Motorcycle hesitates when accelerating 

The hesitation is most evident at 45 trying to "just" maintain the speed. It seemed like a fueling issue, so I immediately thought about the fuel pump and fuel filter Nov 25, 2016 · Hi All, I own a 328xi 2011 E90. 2) Kick into 1st, rotate throttle a small bit just to get going. At high speed it runs ok with no hesitation. It's most noticeable in second gear at full throttle. Since the acceleration enrichment is stacked on top of the fuel the… If the fuel height is too low, the engine will display a lean running condition, where the engine typically hesitates before accelerating or bogs as the throttle is opened. Low compression inside the carburetor can cause fuel or air to build up and result in letting your motorcycle backfire. In a long turn – for example, the first two turns shown in these graphs – the flat section of the radius trace shows the rider keeps a near Sep 23, 2015 · SO just got the bike built, new Super E carb, brought to a local Denver shop for the final tune, brought it back to the mtns, and seems to run great that is until reving at high RPM, it chokes / hesitates for a second when under heavier acceleration. Ask Question Asked 8 years, 10 months ago. The klr air cleaner is quite small for a 650 and will get dirty much quicker than you'd think. It seems that it doesn't matter which gear i am in. Apr 05, 2020 · Type of Motorcycle Currently Riding: 2012 Cross Country Tour My 2012 Victory Cross Country Tour sputters and hesitates real bad when I give it full throttle between 2300 and 3000 RPMs, almost afraid to try and pass it is so bad. My '04 RX 330 had a slight hesitation every now and then when I'd floor it, but my driving style didn't cause it to happen that much. Rebuilt carbs. If the whining noise while accelerating is loudest while taking a turn, the problem may lie in the power steering assembly. Jul 01, 2021 · I run 87 octane most of the time, shift around 3K or lower, and never have any hesitation. If your car acts like it’s about to stall when you try to accelerate from a stop, you may need to have your pump inspected. What causes a motorcycle to sputter? There are several reasons why a motorcycle sputters. Re: Engine hesitates at mid rpm You may take a look at your carburator maybe, your high jet orifice is clog by something,clean your carburator and see to it SOURCE: Hesitates and backfires through the exaust when accelerating. org, is the worlds largest automotive enthusiast group exclusively geared towards the General Motors GM J-car platform including the Chevrolet Cavalier, Pontiac Sunfire, Pontiac Sunbird, Pontiac J 2000, Oldsmobile Firenza, Buick SkyHawk and Cadillac Cimarron. 6 months isn't that long for it to be sitting. The same goes for clutch lever operation and gear shifting—smooth, with positive engagement. I just checked the At in town speeds, this hesitation is not noticed until acceleration is given to bike, so I did not notice until I arrived at my home and then took bike out to highway. when. This method is woefully outdated. under the timing cover near. Jul 21, 2021 · The contact owns a 2011 BMW 328xi. Nov 03, 2014 · With the throttle rolled on at a constant level, accelerating after changing gear, the bike pulls smoothly up to 5k revs then kinda hesitates for half a second before pulling cleanly again up to 8k+. The problems causing ford explorer sputtering while accelerating can be many, but one of the most evident and traced ones is punctured or leaking exhaust pipes. 2020-12-13T13:38:19-05:00 Brussels Motorcycle Riders. Could this be a problem with the spark plugs degrading or are there coil packs fitted to the Dec 30, 2012 · Exhaust popping under acceleration Discussion in 'Engine Topic' started by 70RS350, Dec 30, 2012. 7L TBI the pressure should be between 9 However if I try to do a hole shot, motor hesitates, misfires or backfires (can't tell) then accelerates normally. This sensor was causing a rough idle too, after changing it, no more hesitation when cruising and idle became much smoother. 0:1 pistons. Mar 30, 2009 · Hi guys i have 2004 daytona 650 i have just bought the bike and noticed that under hard acceleration the bike seems to hesitate or misfire, you close the throttle and open it again and it pulls ok. In this video I'll teach you Why Does Motorcycle Jerks When Accelerating in hindi. It is usually off center of the main jet. Mar 29, 2006 · Ok, here is the story. Jul 28, 2013 · Tim Watson reviews the Suzuki Boulevard M109R. When it's idleing and I give it gas it will hesitate and then rev. com ) and elected to do the boat thing from Holyhead to Dublin and back. Before this past winter, the bike ran great with these mods, the jetting as recommended on this site worked out pretty much perfect. mrf. Christopher P. In essence, when the passage and jets in the carburetor are clogged with dirt, air andJeep Hesitates when accelerating. 20mm. noticeable to driver and passengers. The R100/7, BMW's big seller. Resembles bucking like you would get with an electical cutout or a clogged fuel filter. There is no hesitation and much less clunking when shifting gears and a much more enjoyable ride. Viewed 23k times 8 2. And the most accurate diagnosis is achieved using an OBDII code checker. Any suggestions. This will cause hard starting, stalling when coming to a hard stop, hesitation in acceleration and loss of power. Bike has only 1100 miles on it. Hesitates on acceleration. 2 clogged Cat or pre-Cat. 47 Posts. It hesitates on initial acceleration. Mar 25, 2020 · In other instances, the bike may fail to accelerate. I've got an 03 DRZ400 which was stock when I bought it and have since installed the FCR39MX carb, did the 3x3 air box mod, E-model header, holesawed the end cap, and MCCT. Jul 11, 2011 · I have a 2007 Vulcan 500LTD which sat for about 12 months. Jump to Latest Follow 1 - 18 of 18 Posts. Most people complain of a flat spot someplace around 5,000 RPM (look at the torque curve). Bradmanks · Registered. An engine that hesitates when accelerating is either sucking too much air, not getting enough fuel, or misfiring. When I accelerate slowly the engine seems to run fine. Pilot jets are generally down in a tunnel and have a regular screwdriver slot. It is becoming very difficult to start, but with a bit of throttle and few tries I can get it to run. on December 24, 2016. It pops on decel and occasionally at idle, but I know that's a product of the exhaust mod. Furthermore, this other post on engine hesitation during acceleration, listed in the Resources section below, expands on this problem and will help you as well, if necessary. While this Motorcycle Troubleshooting Guide is not a complete guide of every possible cause for each problem listed, it will help assist mechanics in troubleshooting some of the most common difficulties they will face. Hesitation when starting and upon acceleration is usually a fueling issue. Why a car won’t accelerate past 40. Location: Richmond, Va. Jan 24, 2020 · Rich Bog - This type of motorcycle bogging on acceleration is caused by too much fuel. Jul 15, 2018 · Bit difficult compared to an automatic transmission. Discussion in ' 4 Stroke ' started by tonycar107, Oct 20, 2010 . I'm still unsure for the hesitation on accelerating I have a new Fuel filter, fuel pump, new battery and new alternator. Hesitation when accelerating. This is best done with the motorcycle supported so that the rear wheel is suspended and the shocks are topped out. 175 km/h / 109 mph. Harley-Davidson’s are no different. com if you need any help, and our technical support team will be happy to assist you) Free 3 Month Parts Warranty ( Value. That would be a good starting point. Sep 12, 2019 · Put a 1/4 gallon or a Litre and pump it through the system. The problem may occur when the engine is hot or cold or when you are low on fuel. Wheel-speed sensors measure the rotational speed of the front and rear wheels, and the inertial measurement unit measures the vehicle’s acceleration and angular rate 100 times per second. ABATEGA. Acceleration calculator estimates acceleration using three different approaches - velocity distance traveled during acceleration the mass of an accelerating object and the force that acts on it. I went through this last season at the end of the year and swapped out the fuel pipes in Feb 18, 2012 · The bike seems run fine for the first 30 or 40 miles before the problem occurs. If I accelerate slowly then it is fine, Aug 12, 2008 · The J-Body Organization, j-body. But the main problem I've got is while the bike is moving. basley said: Hi all ive recently bought a 98 sc33 and have noticed a persistent rattle from the top end under acceleration between 2. Rich or lean running conditions can be caused by any number of things, so you’ll need to first clean, sync, set and balance your carbs before making too many changes. It accelarates as I give it more gas, but acts as if it is not given enough fuel to get the job done. Engine Hesitates. 2,921 Posts. I have a 2001 Suburban (5. Motorcycle hesitates when accelerating. If any of the Admins think it is inappropriate, take whatever action deemed The scooter hesitates upon hard acceleration. S. When I start the engine from cold initially there is a laudable hesitation and then the computer gives it a bit more “gas” so that the rpm rise to 3800 and then back down to 1900 after a second or two. 2002 CR-V EX seems to make a very strange rubbing sound and seems to bog down a bit when accelerating from a stop. Before that and after , everything Jan 01, 2021 · Motorcycle has been siting for a number of months. I have a TATA Nano CX 2010 (19000 kms). Apr 21, 2019 · Inconsistent idle and hesitation from 0-1/8 throttle and severe lack of power from stop are my current problems. This happens anywhere from 15-35 MPH. Andrews b2 camshaft, s&s super e, andrews 4. idle is good, performance is awesome, air fuel The CKP sends data to the motorcycle computer data center about the position and speed of the crankshaft, the ignition and fuel injection. The 2 things that cause a backfire out the intake is a lean condition or spark while a intake valve is still open. Buying a motorcycle is a big investment. When you first roll on, don’t do it in first gear… wait until third or fourth… because it’s going to accelerate much quicker then you are use to. Top Speed. www. Since the acceleration enrichment is stacked on top of the fuel the… Feb 24, 2009 · To evaluate the needle/needle-jet performance, run the motorcycle in second or third gear. I took my car to the shop, and this is what was done. 2) the main jet is clogged (it could also be the main jet is too small but sounds like it was previously fine, so idles fine, dies when trying to accelerate. Depending on the RATE of the throttle change will determine how much our controller will affect the May 20, 2013 · Hi, I do have off-idle hesitation problem, but also hesitation in higher speeds. My idle was so bad it started dieing on its own. As it warms up, it should accelerate with power and without hesitation. I followed factory pro's instructions, verified the main jet size is good by trying the three available sizes and found the best pull at full Feb 08, 2018 · Hi Folks, I was out on a little ride yesterday and suddenly the bike started feeling like it was running out of gas. 4 bad crank sensor (located. Beginners find it more comfortable to ride. The average motorcycle can go as fast as 80-165 mph, and the top speed of the most popular motorcycle categories are as follows: 125cc motorcycles: 60-75 mph. Keep the belt and pulleys clean. The more one accelerates, the more this particular valve A dirty carburetor could also cause your motorcycle not to accelerate. Unusual surges while accelerating. It's a dang shame, mine runs unbelievably smooth above 60 MPH. Apr 18, 2018. I have 52,000 miles on it now. 1. 7l and whenever I start to accelerate it moves slightly and then stops before moving properly a second later. Sometimes "gunk" gets into the bottom and is hard to get out 2) Then put in fresh gas with the proper amount of Berrymans B12 Chemtool. This is on anymore than 1/4 throttle in all gears and is not changing with engine temp. If you like my video please subscribe to my channel, like and share with yCarburetted motorcycle stalls when accelerator is applied. FI engines depend on many sensor inputs to tell the ECU how to respond, by “blipping” you are tricking the ECU into thinking the engine is doing one thing while you are actually doing another. 0L 135hp hesitates when I accelerate. As a rider, you expect your input on the throttle to affect your acceleration as immediately as possible. We can't decide if we're merely content with Honda's new Shadow Spirit 750, or pleasantly surprised by it. Re-Connect the fuel system and restart and run the bike. So of Jan 01, 2006 · May 11, 2008. 15mm - 0. Feb 19, 2009 · Hello all. 5 seconds, and 1⁄4-mile times of under 12 seconds. Jan 14, 2012 · 31 Posts. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Accelerating. Jan 01, 2006 · May 11, 2008. The most common situation to notice misfires is on high gears, low RPM, and the accelerator to the floor. 0 I really good my experiencesuper Apr 08, 2013 · Commonly, in the break-in period, the motorcycle speed remains low, RPM remains low, and the trip is also shorter. You can feel it like the engine is trying to speed up, but something ACCELERATION: 12 AFR - target with GREEN/BLUE mode Getting up to cruising speed or getting ready to pass someone, you usually are looking for the performance to get up and go. Been using 15w-50 since I bought it at 1200miles on it till about 46K, then switched to 10w-40 (I have it in stock and have been using it as it is also a recommended Feb 18, 2012 · The bike seems run fine for the first 30 or 40 miles before the problem occurs. 3 I had recently replaced a distributor due to a oil leak and car hesitating if i try to go over 3000 rpm. `98 VT750 A. Recent rebuild. Jul 27, 2013 · Discussion Starter · #1 · Jul 27, 2013. At the heart of this big Suzuki is a liquid-cooled, 1,783 cc, eight-valve, short-stroke, v-twin engine that revs smoothly all the way up to 7500rpm. We want to make sure you are completely satisfied with your vehicle. Above 2500 rpm the engine performs very well and pulls strong all the way to redline. But, like If the fuel height is too low, the engine will display a lean running condition, where the engine typically hesitates before accelerating or bogs as the throttle is opened. Common Causes of Acceleration Hesitation. The CKP sends data to the motorcycle computer data center about the position and speed of the crankshaft, the ignition and fuel injection. So much so that I wind it out like crazy Jan 05, 2011 · Overall poor vehicle performance; rough idling, stalling, hesitation on acceleration, etc. I went through this last season at the end of the year and swapped out the fuel pipes in Oct 13, 2017 · Acceleration lag/hesitation in 1st and 2nd. It runs really quiet now and doesn't hesitate when I pull out. The bike has always been cold nature an had to warm up before it would run right. wind her up she coughs ,splutters and hesitates then all of a sudden takes off kinda Z1000 motorcycle owners and Sep 30, 2020 · I'm wondering what might cause the bike to seem to be having a slight degree of hesitation when accelerating at modest speeds. Yamaha YZ125 bogs or hesitates when accelerating hard refers to when the motorcycle is unable to make progress, is reluctant or pauses while trying toOver the past few months, I have been noticing slight shaking and hesitating when I accelerate at low speeds. If something other than the rubbing block is touching the points cam, that is shorting out the spark primary, and the secondary fires when the short stops OR the points open. Roll the throttle on from 1/4 to 1/2 throttle only. Difficulty and/or delay in gear shifting. I noticed a slight hesitation from the engine when I accelarated after shifting into 2nd Aug 24, 2017 · 3 Reasons Why There is Poor Throttle Response. Apr 15, 2016 · Re: hesitation during light throttle acceleration. Before we get to why your bike is not accelerating, let us look at a bike’s accelerating system. #12. Discussion Starter · #1 · Oct 8, 2011. P It is like the accelerator pumps on off-road and racing motorcycle carburetors. I was riding it home from the gas station, and under light throttle, 1200-4800rpm the acceleration seems sluggish. Appreciate 0. start with carb adjustment or rebuild. During acceleration it will pause or hesitate and then jolt. Aug 09, 2021 · About Down Engine Bogging When Accelerating [Diagnosis 1:] Check the health of the knock sensor. This is my first cruiser. Location: Newfoundland. The bike will start fine and will accelerate from 1st to 3rd fine and will redline in these gears if you let it. 3) then hit start button once to turn off power. Dec 04, 2020 · When a hesitation occurs, the oft-used solution is to add more fuel with a larger nozzle or with more lift from a taller pump cam. Also, over the past 10,000 miles the fuel mileage has dropped from 41mpg to 36 mpg. It's always at 3000 rpm, most noticable in 2nd and 3rd gear when accelerating moderately. vehicle briefly and repeatedly lurches under acceleration as if driving on patchy ice-covered road surface. It is downright dangerous sometimes; having an unexpected hicup when you are trying to pull out in traffic SUCKS. Mar 06, 2021 · When your engine hesitates during acceleration, it may seem to have lost its power for a few seconds. Jul 29, 2011 · Hi team, I picked up a 2009 yamaha wr250r with 125 miles on it. Jump to Latest Follow 1 - 10 of 10 Posts. hesitation when accelerating. It's fine if I open up slowly and carefully ease into accelerating (which is no fun). 6. When cold, the engine should start right up and idle smoothly. Sep 30, 2020 · I'm wondering what might cause the bike to seem to be having a slight degree of hesitation when accelerating at modest speeds. Re: Hesitation, stumble off idle Post by Ghostrider52005 » Wed Jul 18, 2012 4:32 am At in town speeds, this hesitation is not noticed until acceleration is given to bike, so I did not notice until I arrived at my home and then took bike out to highway. True, the R6's redline is an over-the-top 15,500 rpm, but its power peaks where the remainder of the test bikes top out -- at 12,750 rpm -- although the R6 still produces a whopping 88. When one or more cylinders stops firing, the power cuts, and the vehicle hesitates under acceleration. I have a video i will post link. Hesitates when accelerating in first gear, almost like a cylinder isn't firing, or fuel delivery problem. White or light gray spark plugs. 1; 2 Looks like all this can be avoided by using motorcycle oils. by Miranda Levingston September 22, 2021. Rebuilding or replacing the carburetor may be necessary. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. I have Vance and Hines and k&n filter. Nov 11, 2019 · In the 1979 Goodyear pre-Daytona tire test, I could hear Mike Baldwin’s Yamaha TZ750 engine make a woo-woo-woo sound as its rear tire spun, accelerating between turns 1 and 2. Thanks, litzvic63755 May 10, 2020 · You have hesitation as you accelerate hard, usually in the low-mid RPM range: This is the computer being hesitant to enter open-loop mode. Ed_Cz said: 2014 Bonneville, hesitates coming off idle (when opening throttle), sometimes stalls with clutch full in when the throttle is open (normal launch). Examples of poor acceleration include an absence of response or a delayed reaction when you twist the hand throttle or shift the thumb lever. Car hesitates when accelerating. Posted by richard_r797 on Jan 19, 2010. Jun 01, 2012 · A motorcycle can accelerate from 0 to 60 in 3 seconds what is its acceleration in miles per hour per second? Wiki User. Sep 14, 2012 · 1) This problem is not affected by temperature. Upon starting a machine, you may notice an excessive lurch that doesn’t feel or sound healthy. Only happens sometimes, but lately when I'm accelerating in first from a dead stop or getting up to around 2000 in second it sputters and hesitates a lot. If you can get it to move you need a new clutch. If the back wheel lights up in wheel spin—don’t panic! Maintain constant throttle, lift your vision further down 1. The dealer didn't picked up the hesitation but changed the oil, oil filter, spark plug, air filter Reason #3: Problems in Fuel flow. 1st or 2nd gear, 2000 to 3000 rpm. Feb 24, 2009 · We're torn. Detonation occurs when excessive heat and pressure in the combustion chamber cause the air/fuel mixture to autoignite. At first I thought it was bad gas but after few fill ups the hesitation is more and more. The slash 7 is as at home on the Superslab as it is in crowded city traffic. The hesitation feeling is like the vehicle is jerking somewhat. " "By far the biggest difference I noticed right away was the newly found silky smooth shifting. 208 Posts. I have just got my CBR400RR out driving again. The other day I was out for a ride for about an hour and I was cruising down the highway when suddenly, the engine started bogging down, losing power but not Aug 05, 2009 · My sv with 63k miles has developed a bad hesitation at wide-open throttle. I set float bowl height, synch the carbs (both of which were near perfect) and cleaned out all of the jets (which were quite clean already). Once I get above 50-55 mph I can hit it with full throttle in 5th and it will pickup with no hesitation. Just had timing chain replaced under warranty and intake value cover replaced. Be sure there is oil in the dashpots on the carburetors for a smooth idle and to prevent hesitation on acceleration. 00! Whether you are looking for classic cruiser show off, a fuel efficient commuter, or just flat out fun, you can't go wrong with our Brand New DF motorcycle RTE. There are three main components of the accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Here's the issue. YouTube - 99 ZX9R CARB PROBLEM If I open it up full throttle from idle it will either hesitate and rev up or go dead. Page 1 of 3 1 2 3 Next > Dec 30, 2012 #1. May 10, 2020 · You have hesitation as you accelerate hard, usually in the low-mid RPM range: This is the computer being hesitant to enter open-loop mode. The back story is, 09 510sm I just opened up the stock exhaust (put perforated core and packed it), has power up kit intstalled. In any system if there is a problem, you might as well fix that problem and see where it gets you. orgHesitates when accelerating but idles good. Not sure if you will find one down under but here is a Feb 08, 2018 · Hi Folks, I was out on a little ride yesterday and suddenly the bike started feeling like it was running out of gas. The air screw is the first step to getting proper jetting. The tacometer goes up and down alittle. " Check out the engine and fuel delivery systems with a “cold-start” test drive. singularism · Registered. The motorcycle stability control system uses an array of sensors to register the riding dynamics of the two-wheeler. Jul 11, 2020 · 05 650, 85k miles/136k k’s Cleaned the tank and installed New fuel pump ( because it needed a new fuel pump, not because I thought it would fix this issue, this wasn’t an issue yet) and it ran perfect for 500miles/ 800k’s Now it starts to hesitate and stutter around 5500-6000rpms, and gets Apr 11, 2008 · Discussion Starter · #1 · Apr 11, 2008. 3) When I rotate throttle a small bit (or even a bit more) the bike. the link below helped me to test the sensor Jan 22, 2022 · As a general rule of thumb, use the sparkplug your manufacturer recommends for your motorcycle (same brand and part number). This happened on every upshift. cboahd A forum community dedicated to Harley Davidson V-Rod Motorcycle owners and enthusiasts. W. With that many vehicles produced, there are bound to be some PT Cruiser problems. Could I have a vacuum leak or gummed up fuel injector? I checked valve clearance, spark plug, and cleaned the air filter. Jul 13, 2009 · My engine recently stated to hesitate in the ~1800-3200 RPM range on gentle throttle push. At highway speeds 55 + there isn’t any hesitation. Is this a characteristic of the CVT transmission or is it indicative of a larger problem?Hesitates when accelerating. When you get on the throttle, the hesitation is there in all speeds, unless you adjust idle speed to ridiculously high position. My steps to reproduce. When I open the throttle it resolved. Unfortunately riding can also be dangerous, and not so much fun if you crash or have an accident. 600cc motorcycles: 90-165 mph. Mar 01, 2017 · I noticed that between 10 and 15 mph I have some hesitation on 2nd gear on my 16 Chieftain . The fuel is not supplying high power after the combustion. The problem often means the air/fuel mixture is not being properly enriched or is going lean, or the ignition system is weak and is misfiring when the engine comes under load or the air/fuel mixture goes lean. The symptoms and performance suggested the bike was running lean; exhaust popping when downshifting, hesitation while accelerating, 1stCar engine hesitation is when you step on the gas pedal and your car stumbles or doesn't accelerate right away. top) 5 clogged muffler (caused by. Punctured Exhaust Manifold. My 2008 GT 500 has less than 8000 miles and for the last couple of months has what I call a hesitation issue. idle is good, performance is awesome, air fuel Power Steering Problems. I had on my carb lose jet, and it was giving me all kinds of problem. After driving it for about 15 minutes I come to a stop like at a stop sign or traffic light. 2004 rsvr, had this problem since I got the bike. Yamaha YZ125 bogs or hesitates when accelerating hard refers to when the motorcycle is unable to make progress, is reluctant or My 2010 Jeep Patriot (automatic) seems to hesitate just a little bit when accelerating. This problem was fixed for a moment after refueling then it started happening again. Symptom #6 – Engine Misfiring Aug 12, 2008 · Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. As they step on the gas pedal, the car does not accelerate in a more normal manner. 2) Check that the Needle Jet (nozzle) is installed correctly. Acceleration now stuttering 2 weeks later about 1500/2300 RPM with flashing CEL. Such prodigious over-rev will be a great advantage to Sep 17, 2011 · the bike 05, all stock engine minus yosh pipe, has some driven sprockets -1 +2 i believe, 3900 miles. 6) Problems Switching GearsA lean bog will stop accelerating and sound like the engine is dying; the same as if you were to hold the kill switch down. We refer to any fast turn of the throttle as our ACCELERATION zone. Location: florida. Intermittent CEL. If the problem is with transmission fluid, it means that the engine is taking fuel through a hosepipe, and this is what leads to white smoke coming out of the tailpipe when you press on Motorcycle Troubleshooting Guide. In a long turn – for example, the first two turns shown in these graphs – the flat section of the radius trace shows the rider keeps a near Oct 28, 2017 · Joined Aug 11, 2015. Too much airflow or too little could cause poor acceleration performance, but it could also be linked with other engine issues. Sometimes, motorcycle owners just eliminate the sensors. Harley Davidson Pan America Forum Nov 02, 2010 · The problem: under accelerating conditions between half to full throttle the motor hesitates and lacks power. I know on my Suzuki it use to hesitate because the plugs would foul every now and Again it should be emphasized, the #1 cause of carburetor related problems on a Harley or other V-Twin motorcycle is VACUUM LEAKS. Correcting the TPS then produced a correct idle, and no code. (3) The check valve prevents the fuel backing up through the fuel pump. The little engine is basically a generator engine that was designed to run 3500 RPM all day long, thus the carburetor doesn't have an accelerator pump. The problem might also be from the timing or floating of the valve. 4) then remove foot from accelerator. Or. Bike starts fine, no problems and under conservative riding it accelerates fine. WHAT IS DETONATION? Detonation (also called "spark knock") is an erratic form of combustion that can cause head gasket failure as well as other engine damage. Wish I could give you a more definitive answer but my guesses would be bad gas or that battery. After Jun 30, 2013 · Doing this will cause popping and fool the ECU into thinking you are accelerating thus compounding the problem. I also noticed the tachometer bouncing on me a few times. What Makes A Car Hesitate While Accelerating. Rough acceleration is a typical sign that your engine is misfiring. Feel multiple small dips in power as the engine accelerates between 2250-3250 rpms. Broken rods, pistons or crank bearings, cooling difficulties, and failed or distorted valves may also cause the engine to misfire. Hesitating, surging, and mild bucking would probably be the best way to describe it. At times it makes me thing it's going to stall but once I've driven a few miles it goes away. Why Does My Car Hesitate When I Accelerate? 7 Common Causes