Motorcycle Sputters At Full Throttle








	The tach doesn't do anything abnormal at 7000. I paid the extra money to have it come fully assembled. Thicker gloves and an extra down jacket under my now warm, toasty, dry motorcycle jacket for me, and a full all-weather suit for Gregor. If your Buell Motorcycle is experiencing problems and you could use some friendly advice to help diagnose/troubleshoot the issue, please first review the extensive listings of issues already documented below; if none match your particular Buell troubleshooting issue, then please initiate a new thread here and post a thorough description of your particular Buell Motorcycle problem. If I shut it off for 20 minutes, the scoot will fire up, run great, but at full throttle it will die again after just 2-3 house lengths. I know of a couple Suzukis that had the top throttle sensor go bad but. 6L 16V transplant. Weed eater stalls when given throttle. While riding my totally stock 97 Honda CBR (11K miles), it occasionally acts as if it's running out of fuel (even with a full tank of gas) and will quickly sputter to a stop. Anyhow, after I got it cranked and warmed up, I used it to pull the lawn mower out of the ditch and decided to ride a bit. Air filter dirty. Low Idle Adjustment Move the mechanical throttle to the engines slowest speed and perform the same procedure on the low idle valve that. Engine misfires at full throttle! Unit looked brand new except for the tires being almost worn out. Make sure the battery cables are nice and tight first use a socket or a wrench. If I hold 3/4 to full throttle, it sputters at first, then after a few seconds it will just "catch" and the rmps will go up. About 4 months back I was. when out of water it will run fine, but when the motor is pushing the boat in the water it has hardly any power. A carburetor is a device that controls both the amount of air and fuel that is allowed into the cylinders. As for the throttle, if it's running well, it's fine at all throttle levels, and if it decides to spit and sputter, it idles great, but acts up on full throttle, all the way down to about 1/4 throttle. 	Diagnosing Problems / Causes / Intake Boot (Das Boot!) This is a summation of several posts on BadWeb (thanks to all). I have a rm 125- 2 stroke dirt bike, that when you give it full throttle, sputters and loses power. One of the more frequent problems with modern vehicles is a bad throttle position sensor (TPS). I recenlt switched to non ethonl gas. The tiny thing that keeps your car working, often falls prey to regular wear and tear, and therefore must be taken care of. Sputtering at high RPMs Does anyone else have issues where if you go WOT as in throttle pulled back as far as it'll go, it starts to get sputtery? Around 10k RPMs, it starts to sputter a little when I have the throttle all the way back but if I roll it forward just a little so it's not all the way, it goes smoothly. As I roll on the throttle the engine boggs down and sputters as I ride and looses power. You can hear what I am talking about 15 seconds into the attached audio file. The issue could also be an incorrectly adjusted throttle stop. The idle circuit and idle speed is adjusted with a screw. I just replaced the vent tube on the top of my gas tank (the gas cap itself is not vented). Mercruiser 4. " If I open the throttle full the engine sputters. Finally after cranking it over a couple hundred times, with the battery almost run down, it fired back up and I headed straight home. The throttle blades may not go fully open until the engine is actually above a certain RPM, or some other parameter is met. Hi all, 1st time post here. Needle jet/jet needle - Mid range circuit. 		Its main problem is right off idle. No acceleration w/o babying throttle and/or choke & then still very bad Choke opens/closes freely Babying choke does not prevent stalling while in motion Brakes release fine Rolls fine in neutral If gets to speed it sputters and/or backfires Sometimes will seem to run better for ten feet & then sputters or backfire thru exhaust annoying. Vacuum leaks can disrupt the air-fuel flow because of an imbalanced airflow, which can cause throttle body pressure problems. While motorcycles are as different from one another as their riders are, there are some common trends as to why your motorcycle won't start or isn't working properly. How to Start a Sputtering Snowblower Engine. JimSTer Motorcycle "rider"!! MOTM. I have a 2006 150cc gy6 Sunl scooter. For example, using too large of a main jet will cause more fuel to enter the combustion chamber than it can efficiently burn. It's got an Akra pipe, Power Commander USB, and K & N air filters. I did a few things myself recently. screw) until the engine either begins to sputter or begins to slow down again. Dave got you figured out. Don't take the chance. Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. com My bike is sputtering whenever I give it full throttle The problem of having an engine “sputter” is typically caused by a fuel system issue. If I go beyond 1/4 throttle, it works beautifully. 	My motorcycle stalls when I open the throttle, but runs fine when idling in neutral. " The problem; I started noticing it at red lights or stop signs. While riding my totally stock 97 Honda CBR (11K miles), it occasionally acts as if it's running out of fuel (even with a full tank of gas) and will quickly sputter to a stop. I have a sputtering problem on a 400ex? I have a 400ex that at half throttle starts to sputter but when i give it full throttle it will go. Bike idles perfect, but dies when given the slightest amount of throttle. Frequently asked questions for Honda Power Equipment, including Honda Generators, Lawn mowers, Tillers, Trimmers, Snowblowers, and Water Pumps. Idle Circuit - for idle and off idle. The buggy still sputters and tries to die after a run at full throttle. 3) Replace the power valve. This video shows hot to fix it in a. Harley carburetor jetting can be accomplished with minimal mechanical knowledge. PNW Riders is a motorcycle rider enthusiast community for all types of riders in Washington, Oregon, Idaho and the surrounding areas. When the main jet is severely rich the engine will sputter in the high RPMs and have a lot of trouble making power up top. Throttle Body Assembly Any ideas on how to fix my throttle by wire issues on a 10 Street Glide? When you turn the key and hit the run position it goes click click click real loud, now the C. I have a 27hp vertical shaft kohler command on a husqvarna zero turn that sputters under load at full throttle. After 5-10 minutes of starting and restarting I can get it to take the throttle and after some hefty throttle use it will idle ok without the choke. 		As it warms up, it gets progressively worse from spitting and sputtering at 5k to 4k then finally all the way down to 3k which is the cutoff. im gonna change the plugs to see if it helps. I own a 1995 LS650, for some reason at random times when I am accelerating (in any gear) the engine kinda lags out or 'sputters' and is unresponsive Stuttering/Lag when applying throttle please help =( - Motorcycle Forum. Re: sputter at full throttle thanks charlie - fuel pump and carbs rebuilt 2 weeks ago -float set and it does it no matter which tank i use - tanks were new as of 2 years ago -bulb stays firm - i can nail the throttle from a stand still and all is good until it gets up to about 5400 rpm at steady speed. Hey guys, Im currently touring on a nighthawk 750- Ever since hitting colorado my bike started slightly sputtering when i accellerate from 2-5k rpm. I have a 88 Samurai with a 94 Sidekick 1. what is causing - Answered by a verified Motorcycle Mechanic. I am trying to tune out a hesitation in the off idle part throttle range. If I happen to release the throttle the speed will drop and if given more throttle it will stay at that lower speed and not go faster till I pull over. Hi all! I don't often ask for advice here but now I'm stuck. Low rpm operation is controlled by the intermediate jet (#11). I assume the bike is properly jetted since I had a shop do a full tune up shortly after purchasing it. if i give my bike full throttle it spitts and sputters, i'm guessing there is too much gas, and not enough air, but i dont understand why my motor would just be like that when my buddy's engine runs fine and everything is the same between them. Just like many on here way to lean from the factory. PW50 sputters at full throttle : Danny said 2006-08-16 20:02 : OK, I re-jetted till I was blue in the face, decarbonized the exhaust and exhaust port, checked the reeds, used 5 different plugs, cleaned the carb several times, clewaned the air filter, changed the spark plug cap, checked resistance on all the electrics, per the manual, and I\´m still at square one. Buell Blast Motorcycle Discussion Forum. 	Yes the load does make a difference. Higher effect at lower RPM's with decreasing effect to full throttle. Honda brought their all-new NT700V touring motorcycle to the United States last autumn. A carburetor is a device that controls both the amount of air and fuel that is allowed into the cylinders. After a short ride, we stopped for her to get gas. Honda CBR600RR 2003 – 2006 Motorcycle Service Manual The Cyclepedia. then immediately sputters out?  Instead of a throttle cable to the throttle body, the. If I was in second gear at low RPM and gave it a little throttle, the bike would missfire some more and buck a lot. hey everyone thanks a lot for the help! Process is slow-going on this bike thats why my replies take some time we may have figured out a. My bike is sputtering whenever I give it full throttle. Scooter sputters and dies. I had a total power loss from 70 to 55 mph while i was WOT (wide open throttle). Fuel for the bikes, filled to the brim. This bike will accept full throttle cleanly from 2500 rpm A +4 degree ignition advancer is recommended and will sharpen throttle response throughout the rpm range with no penalty to top end power. My boys RM 85 did the same thing, and I changed plug, plug cap, tried diffent brass, cleaned the carb, new carb hoses, cleaned carb, checked the power valve, the reeds, the ignition (it has a vortex ignition) different plug heat ranges. December 8, 2009 at 1:35:00 PM PST. They also have a throttle to reduce the intake airflow (and pressure) to control engine speed. 		Its main problem is right off idle. Gas in tanks, valve open. I haven't done a full throttle plug chop with a new plug but I have changed the plug and changed the main jet from 182 - 188 it doesn't make a difference, it still cuts out. Perform full throttle “drag strip” runs through the gears reaching the top gear and pulling for a few seconds in that gear (don’t go to top speed at this point just in case you are too lean). Sputters occur when riding solo or with my lady on the back. I hate to guess, and in most cases diagnosis is a process of elimination. The carburetor adjustments include idle speed, idle circuit mixture, mid-range and high-speed circuit mixture. Pull the throttle handle hard to about half way and release. There is a MAP sensor on the top of the TB that could be the problem but you should get a DTC if that goes bad. then immediately sputters out?  Instead of a throttle cable to the throttle body, the. It is also commonly caused by the accelerator pump inthe carb not squirting enough fuel before the main jets start working. QUOTE] I'm not sure I understand this part. After cleaning The bike ran great with no sputter , no backfire, very quick and easy start. when you hold it full throttle 38 to 40. So, I'm not sure where to look next. Use a toothbrush if needed. If the engine has a flat spot, or is popping/sneezing in the air cleaner, it can indicate a lean condition. 	Stumble at full throttle About 70K on the bike. Starts again ok. can someone please. Suzuki V-Strom Motorcycle Forums > V-Strom Forums > Feedback to Suzuki  I synched my throttle bodies and adjusted my. I think it is your gas. QUOTE] I'm not sure I understand this part. Sunday afternoon after I filled up with gas it started sputtering. Example 1: A Steady Throttle test showed a surging symptom, indicating a. Main jet replacement should be reserved until after the slow idle jet is replaced and mixture is tuned unless a lean condition is apparent during full throttle. 850 sputters upon acceleration????  for a split second until rpms rise and the throttle is opened more to mid or full. Brass nozzle tip can be cleaned when fuel bowl is removed. They have a dyno so that's no problem. Made me think of carbon'ed up plugs and I dismissed it at that. This bike will accept full throttle cleanly from 2500 rpm A +4 degree ignition advancer is recommended and will sharpen throttle response throughout the rpm range with no penalty to top end power. To evaluate the needle/needle-jet performance, run the motorcycle in second or third gear. Thicker gloves and an extra down jacket under my now warm, toasty, dry motorcycle jacket for me, and a full all-weather suit for Gregor. i have had a bug in this thing for sme time and so far no luck figuring it out, here is a list of everything done. Perhaps the only part of a motorcycle that is taken for granted more than tires are the spark plugs. it is jetted correctly nice chocolaty brown plug, no smoke when it runs all out, just sputters. 		With the CV, when you twist the throttle, all you do is open a butterfly valve and the resulting vacuum then causes a rubber bellows to lift which lifts the throttle slide, thus giving more air. when hitting full throttle starts to spit and sputter. Now when I open it up to full throttle and get going over 35 she acts like she is running out of gas and sputters jolting the bike and I I ease off throttle and she cruises at 35 fine I called my mechanic and he said I need to re jet my carb with a size bigger to compinsate for the extra air ANy ideas would be great. Which leads me to believe I'm not running too lean. How to Start a Sputtering Snowblower Engine. I paid the extra money to have it come fully assembled. If you get really close, just tweak the screw a tiny. The throttle Valve is the big slide that opens and closes your throttle has a bevel angle cut in one side of the big round (can be flat, too) slide, toward the air cleaner. This is also in line with Al Ghazzali’s assertion that there is a limitation to the full awareness of knowledge of the Divine Essence. i got a 05 raptor 350. I disconnected and capped all vacuum lines. This angle comes in several sizes and helps control the fuel mixture from idle to about 35% open throttle. The first bit of the throttle is fine, then there's a section that sounds like its going to die, keep twisting and it breaks out of it in the high rpm range. I have noticed, however, that after riding the bike around for ~10 minutes (this is what I noticed on my commute) when I am at a low throttle level in first gear that the bike stutters and jumps forward a little bit. Backfire's through the exhaust on off throttle deceleration are minimal. 	Is the fuel injector bad or clogged and. only thing i can think of is i had to disconnect the throttle and choke to. The battery is a few months old, but I'll charge it today, just to make sure that it's fully charged. If your car is an auto, the throttle position sensor is also wired to the auto transmission (A/T) computer. If I take it off the choke too early (5-7min) she dies. If I disconnect the fuel line just past the filter I get a nice steady flow of fuel. After doing some riding, it's pretty clear that the bike surges and sputters when I maintain a constant throttle. If you own a motorcycle, chances are you've experienced a backfire in the exhaust, which can cause quite a jolt for an unsuspecting rider. Sometimes, internal combustion power equipment (lawn mowers, chain saws, string trimmers, leaf blowers, etc. I have a problem with my 2003 Vulcan 800A. But even now, I still getting lots of sputtering and jerks at higher RPMS, say like in 3rd gear for example. International. Stumble at full throttle About 70K on the bike. victory crosscountry sputters when reving up, victory kingpin sputtering in second gear , victory kingpin vacuum cause sputtering , why does my victory cross country run with vacuum lines unplugged, why my motorcycle is all of a sudden sputtering at low throttle. The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust: Rigid_EVO 883 spits/sputters at full throttle low rpm. My 98 SH got a new paint job when pulling it out of storage this year (stored it last year like before using fuel stabilizer). The employee will be responsible vehicle scheduling, including picking-up/returning for all shop and video test vehicles, supporting, testing product installations and design of new products such as mufflers and exhaust systems, transmission shifters, differential covers, suspension components and other types of automotive related. 1K ohms, when at full throttle it should read 4. Throttle Body Assembly Any ideas on how to fix my throttle by wire issues on a 10 Street Glide? When you turn the key and hit the run position it goes click click click real loud, now the C. During the week in the Outer Banks, I did notice one time that there was a slight hesitation and sputter during one of our evenings out. 		Motorcycle Shock Preload Adjusters. I have a 98 M900 that I have been trying to sort out for the past year. I have checked all the fuel hoses, changed to a new performance plug , and now I am looking for further advise. It was the first time I really got on the throttle on my 03 CRF 450 since break in. Just like many on here way to lean from the factory. I rode it hard one day, up a steep power line trail, full throttle in first and second. However, the one area that I am still having problems with is that it will sputter and/or bog when I have the throttle at 1/4 travel and belowsuch as when crusing along in 4th gear at around 40 MPH. I figured it was altitude at first but the more i think about it- a lean jetted bike should be running better at higher elevations. They can be approx $170 new. Put it back together and it should run great. My motorcycle stalls when I open the throttle, but runs fine when idling in neutral. Upon initial startup in the morning, the bike runs fine for a few blocks (3 or 4) then sputters to a stop. It starts & idles fine, then sputters around 1/4 throttle. When at apx 3/4 throttle the motor would sputter, sort of micro shut-downs, w/ loss of power thrust, barely could sustain flight. When we started it wouldn't idle if you pushed the throttle half way, it would sputter but it wouldn't die, and if you gave it full throttle it would rev up and sound like normal. When I pulled it back out it was sputtering badly and would die on me unless I had it full throttle. Total Motorcycle Forums. 	Suzuki V-Strom Motorcycle Forums > V-Strom Forums > Feedback to Suzuki  I synched my throttle bodies and adjusted my. 004 feeler gage blade (do not use a razor blade or knife blade as tip will be damaged) and pass it through nozzle slot. Stumble at full throttle About 70K on the bike. Last Sunday I:. If you spit the instant you blip the throttle it is probably the accelerator pump in the carb not working, plugged up or out of adjustment. Do you live where alcohol is a pump fuel additive? And are we talking about a carburated engine, as opposed to something with a fuel pump?. The largest problem with the information about performance mods on this bike stems from the fact that many shops use an inertia dyno and can really only tune for wide open throttle. when hitting full throttle starts to spit and sputter. I was riding the other day and it just seemed to not want to rev up. FZ6S 2006 throttle problem I have bought fz6 s from 2006 sone 11 months ago, and after few months it would, after some wormup start to sputter and shake badly when throttle is twisted a little more. I have a 2006 150cc gy6 Sunl scooter. it has 28k on it and has never run poorly except after sitting for a while, and i know it is the gas gumming up the carb. Rolling the throttle easy up through the rpms there’s no issue. JimSTer Motorcycle "rider"!! MOTM. Technical Discussion - Sputter at full throttle - Ok, hope someone can point me in the right direction. This happens even if I'm on partial throttle anything over 3k rpm after the car has come to full operating temps and its spit, sputter and backfire city. (93' GS500E Hey guys, i recently blew the engine on my gs500 and bought/ installed a used one from the same year bike. I was able to hold a little over wake speed and limp back under a halting idle. With the CV, when you twist the throttle, all you do is open a butterfly valve and the resulting vacuum then causes a rubber bellows to lift which lifts the throttle slide, thus giving more air. Thread starter Mountain Mike;  First Prev 5 of 7 Go to page. 		We replaced the plug, bent the reed values shut, checked the fly wheel (to make sure the keys not broken), cleaned the carb, and put fresh new 32:1 premix into the tank. Yamaha G1 Only Runs with full choke and full Throttle The problem is that it wouldn't start with out using starting fluid, so I took the carb off and cleaned it completely with carb cleaner including removing all the jets and adjustment screws and cleaned them making sure I could see daylight through each hole. There is a MAP sensor on the top of the TB that could be the problem but you should get a DTC if that goes bad. How does it accelerate with the choike on full? If it's OK using the choke, then I would be looking at the fuel system. I'd be cruising on the highway and step on it and it would cough and sputter and then clear up. Then using the carbs pump rod, pump fuel through nozzle by hand until a good stream is obtained. This circuit is controlled by 2 things: the Main Jet, and the main air jet. However, in this study the factors only explained 72% of the effect. It really slows down, not just an occasional miss. Hey all, can anyone help me figure out a problem I’m having with my 2012 350 XCF? Side note, I’m meticulous with this bike! I absolutely love this bike, but recently I’ve encountered a sputtering at about 1/4 throttle. Hesitation at full throttle (not necessarily high RPM) can be due to excessive plug gap (worn plugs - plugs open gap as they age due to. hesitation,spluttering on acceleration. Harley-Davidson Fuel Injection basics It is a sad day in Hogville. I totaly forgot that my camera is on and this is what was cought on 'tape'. Milwaukee at full throttle. The first bit of the throttle is fine, then there's a section that sounds like its going to die, keep twisting and it breaks out of it in the high rpm range. 	When driving the bike at a constant throttle position between 4000-5000 rpm the engine starts to sputter and cannot keep constant revs and the bike starts to jurk. I have a 2006 150cc gy6 Sunl scooter. After 2500rpm bike is 100% normal. today my bike started to sputter all of a sudden on my way back home. only thing i can think of is i had to disconnect the throttle and choke to. Find the Standard Motor Products Electronic Throttle Position Sensor - MC-TPS1 at Dennis Kirk. Hi, i need help i bought a 2002 GSXR 1000. We are going to mimmick open throttle by jumping the relay behing the glove compartmnet and then put a fuel gauge on the shrader valve for the fuel rail. Sputter at full throttle Any way down to business I got home, Put a set of ape hangers on my Heritage and have been doing a lot of riding. Total Motorcycle Forums  it now only runs good at an idle or very low throttle. When I backed off the throttle it seemed to run fine. If the engine has a flat spot, or is popping/sneezing in the air cleaner, it can indicate a lean condition. If it "bogs", or temporarily sputters and then revs, adjust the mixture screw until there is no hesitation. I have a 1975 z1 that I just rebuild recently, I had 1974 carbs on the bike about 2 weeks ago and the bike ran perfect But then I put on the correct 1975. I haven't done a full throttle plug chop with a new plug but I have changed the plug and changed the main jet from 182 - 188 it doesn't make a difference, it still cuts out. As for the throttle, if it's running well, it's fine at all throttle levels, and if it decides to spit and sputter, it idles great, but acts up on full throttle, all the way down to about 1/4 throttle. It didn't die or anything and still idles fine but when put in any gear, it sputters badly above 20 mph as if it's misfiring. L is on all the connections at the unit and ECU are good, I disconnected the power commander and the throttle pack and same problem. You need to unclip the throttle linkage from the TB (see tips above regarding not breaking the clips), unclip the idle/full throttle switch plug, disconnect the two vacuum lines and the 3 in rubber hose, unscrew the three nuts holding the TB on. What To Do When Your Motorcycle Won't Start. 		Bike idles perfect, but dies when given the slightest amount of throttle. I have a rm 125- 2 stroke dirt bike, that when you give it full throttle, sputters and loses power. If the engine has a flat spot, or is popping/sneezing in the air cleaner, it can indicate a lean condition. I'm trying to fix a friend's Yam o/b. The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust: Rigid_EVO 883 spits/sputters at full throttle low rpm. I know a Yamaha dealer that told me they replace them on Yamahas very often. So if you are riding along at middle rpm in 3rd gear, and whack the throttle full open, what happens? Does the bike just instantly bog, gradually work through the bog and then accellerate to high rpm?. If I disconnect the fuel line just past the filter I get a nice steady flow of fuel. The battery is a few months old, but I'll charge it today, just to make sure that it's fully charged. The mighty Harley is slowly loosing its carburetor. There is a MAP sensor on the top of the TB that could be the problem but you should get a DTC if that goes bad. The TPS is used to monitor the position of the throttle butterfly valve. I disconnected and capped all vacuum lines. This happens even if I'm on partial throttle anything over 3k rpm after the car has come to full operating temps and its spit, sputter and backfire city. Showing 1-25 of 25 messages. The carb I am using is a NOS Holley 9834-1 Here is what happens: Car starts fine hot or cold. Ask a Mechanic Online! Free Auto Repair Advice by Professional Mechanics If you are a do it yourself 'er then you have found the Online auto repair and maintenance source that can help you achieve your goal. Engine sputter or misfires (1/8 - 1/2 throttle) This generally indicates a lean fuel mixture. can pull over shut down and restart and problem usually goes away. Pilot Circuit - small effect on idle. 	butdo the simple stuff first. What's wrong?  it turned out to be the petcock full of rust. The Main circuit is responsible for throttle openings from 3/4 throttle - Wide Open Throttle (you'll see me refer to this at WOT later on). php on line 143 Deprecated: Function create_function() is. Keihin CV high RPM carburetors are installed on small displacement, single-piston motorcycle engines. when you hold it full throttle 38 to 40. The bike idles way better, doesn't die with he choke too, but under load it still bogs down around 5-7k from, bogs down alot on full or half throttle too - Iqbal Khan May 29 '16 at 21:47 From what I've read people at its a jet issue or something being dirty or clogged it seeing that I've cleaned it so much I doubt this. Hi all, I just bought my bike about 2 weeks ago and for the most part it runs well. any Ideas will be entertained, photos of gals optional, I need something to smile about. We are going to mimmick open throttle by jumping the relay behing the glove compartmnet and then put a fuel gauge on the shrader valve for the fuel rail. I am at a loss, if I work upto speed she runs just fine, if rpms drop too low she starts surging sputters and dies. Having gained popularity and selling pretty well in Europe for years, Honda’s mid-sized V-Twin is claimed. acceleration Sputtering and popping was the first indication of trouble with mine (see: Another one not running). Now when I open it up to full throttle and get going over 35 she acts like she is running out of gas and sputters jolting the bike and I I ease off throttle and she cruises at 35 fine I called my mechanic and he said I need to re jet my carb with a size bigger to compinsate for the extra air ANy ideas would be great. Hesitation at full throttle (not necessarily high RPM) can be due to excessive plug gap (worn plugs - plugs open gap as they age due to. VW Carburetors 102: VW Carburetor Jetting After springing for a set of carburetors, some people bolt them on, and are "pleased" with the results. 		I pull to the side of the road, wait a few minutes, choke the carbs and the bike starts right up again. 30 to 45 mph. If I slowly accelerate it is fine, but if I floor it it bogs. Almost always sputters at 2600 rpm. Hesitation at full throttle (not necessarily high RPM) can be due to excessive plug gap (worn plugs - plugs open gap as they age due to. Back when John Cena was a rapping thug who wore a dog chain and spoke in rhymes, he managed to come across the path of The Undertaker, leading to an eventual "fight for respect" at the Vengeance 2003 pay-per-view (PPV) event from the Pepsi Center in Denver, Colorado. Total Motorcycle Forums. On FI bikes DO NOT "blip" the throttle when decelerating. How to Start a Sputtering Snowblower Engine. One of these band-aids was "ported spark", which moved the vacuum pickup orifice in the carburetor venturi from below the throttle plate (where it was exposed to full manifold vacuum at idle) to above the throttle plate, where it saw no manifold vacuum at all at idle. Higher effect at lower RPM's with decreasing effect to full throttle. Although we focus on regional Pacific Northwest riders, we often have members from the Midwest, East Coast and overseas enjoying the site. That's all I did, changed the pipes. First and foremost - when you slow down let go of the throttle completely. It pops and backfires coming off full throttle. The sync wasn't off by much. The carburetor automatically adjusts the mix across the entire throttle range. To keep it going and a roof over our heads, we run events (25 this year!. 	Have selected the BEST main jet for full throttle power (not just a "good" main jet - we mean "the BEST main jet" for power at. I paid the extra money to have it come fully assembled. Echo Blower Bogging / Lack of Power at Full Throttle Problem Solved!  How To Clean a Throttle Body ~ The RIGHT  HumbleMechanic 268,947 views. I kept rolling the throttle but it just kept jerking badly. My dog bone was pretty weak (stock) and the engine was turning/rocking enough on the pend. sputter while rolling throttle at lower rpms I bought my fiance a leftover 09 at the end of the season last yr. Now when I open it up to full throttle and get going over 35 she acts like she is running out of gas and sputters jolting the bike and I I ease off throttle and she cruises at 35 fine I called my mechanic and he said I need to re jet my carb with a size bigger to compinsate for the extra air ANy ideas would be great. Your compression must be higher than 50-60psi in reality if the engine is running. S&S ® Cycle, Inc. As long as I let off the throttle it stays running with clutch in or in neutral. QUOTE] I'm not sure I understand this part. Many customers who come to us learn that, despite a previous diagnosis, they don't need a new engine, only certain repairs or adjustments. Riders already know that the U. The Main circuit is responsible for throttle openings from 3/4 throttle - Wide Open Throttle (you'll see me refer to this at WOT later on). It pops and backfires coming off full throttle. To keep it going and a roof over our heads, we run events (25 this year!. it's strange, the bike is a beast, runs perfect, until you hit full throttle. Main Jet - Wide open. 		L is on all the connections at the unit and ECU are good, I disconnected the power commander and the throttle pack and same problem. Which leads me to believe I'm not running too lean. While the management is willing to bear the pain, the investors are finding it. The problem is that most people don't always ride at wide open throttle and should care about how the engine is performing at all throttle positions. hey everyone thanks a lot for the help! Process is slow-going on this bike thats why my replies take some time we may have figured out a. I disconnected and capped all vacuum lines. But unless you check everything, you'll never really know what youre dealing with. When driving the bike at a constant throttle position between 4000-5000 rpm the engine starts to sputter and cannot keep constant revs and the bike starts to jurk. I know of a couple Suzukis that had the top throttle sensor go bad but. I pull to the side of the road, wait a few minutes, choke the carbs and the bike starts right up again. My 06 GSXR 1000 has been giving me major problems. I figured it was altitude at first but the more i think about it- a lean jetted bike should be running better at higher elevations. How many turns out should the air/fuel screws be? I think I am at 1 1/2 out. See pics for details. Turns out I had a bad main ground from the chassis to the transmission. Hey all, can anyone help me figure out a problem I’m having with my 2012 350 XCF? Side note, I’m meticulous with this bike! I absolutely love this bike, but recently I’ve encountered a sputtering at about 1/4 throttle. 	Half to full throttle runs good. was full of rust cleaned that all off. NOTE: This is not a comprehensive list, giving every possible. Make adjustments the way I mentioned before on the tps to achieve the correct resistance readings. While riding my totally stock 97 Honda CBR (11K miles), it occasionally acts as if it's running out of fuel (even with a full tank of gas) and will quickly sputter to a stop. next, also in diag mode, play with d_01, which shows the value for your tps. 12- Always be sure to attach the hose to the overflow tube fitting (#6) and route it towards the back of the engine. I can pull on the choke to keep it going enough to get it to a parking lot. I am at a loss, if I work upto speed she runs just fine, if rpms drop too low she starts surging sputters and dies. Realistically, I tend to do this procedure every 24,000 miles as part of a full-service tune-up. I did all of the normal things to solve the problem, I could not solve the problem and was beginning to hate my motorcycle and Harley Davidson. 4 Reasons Why Engines Lose Power Over Time And How To Win Your Horses Back. I had a total power loss from 70 to 55 mph while i was WOT (wide open throttle). won't idle, goes into fuel saving mode under throttle and fires on 1 cylinder only and I can smell gas when this happens by the way. A couple of days later I fired it up, but it ran horribly.