Question about Harley Davidson Motorcycles

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Bike starts when you pull out the choke and runs but dies when you give it throttle

Posted by Anonymous on

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  • Harley Davidson Master
  • 3,506 Answers

What year? Could have a fueling problem or just an accelerator pump system problem depending on whether or not it completely dies of it just sputters and then runs. Give more details please

Posted on Oct 18, 2014

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Posted on Jan 02, 2017

  • 91 Answers

SOURCE: Suspected problem with choke.

hey apparently and did are two different stories draining the float bowls and cleaning the carbs are two different things the fact that the choke dosent change suggest the carbs are stopped up after sitting for 1 year clean the carbs let them soak in carb cleaner and blow them out with high pressure air, keep notes of the adjustments befor you dissasemble them (air screws)

Posted on Jan 11, 2009

  • 48 Answers

SOURCE: will only run with full choke and absolutely no throttle.

Carbs gummed up. Need a serious cleaning or a full ruubers replacement/rebuild kit. Gas turns to gummy when left stting in the fuel bowls.

Use a couple of cans of Sea Foam.. best stuff in the world.

Posted on Mar 20, 2009

  • 3567 Answers

SOURCE: bike bogs when throttling

Quitting is a no-no. Move the needle clip down one notch and also remove and clean the carb if it has been dieing..

Posted on Apr 11, 2009

adnanbhatti
  • 1188 Answers

SOURCE: bike only runs with choke on or giving it

There are two possible solutions:

1. If you are sure the engine is OK then you can increase the throttle screw to increase idle race. The throttle screw can be found where the throttle wire connects with the carburetor.


2. If the bike is old or if you have not changed the engine oil on time then the bike needs piston ring replacement. This should be done as soon as possible to avoid more engine damage and effect savings on cash.

Posted on Aug 09, 2009

  • 13 Answers

SOURCE: Engine dies when choke is taken off or when throttle is applied.

where the valves set cold or hot? could make the world of a difference...is there intake leaks? bad floats perhaps....its a problem that will take some time cancelling out problem by problem

Posted on Oct 09, 2009

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I can start my bike up, with full choke on, but after a few minutes it will die. Also, whenever I give it gas with the throttle, it immediately dies.


Something has to be fubar with the main jet circuit of carb. That explains why it starts and then shortly thereafter shuts down. Also explains why when you give it gas it cuts out cold.

U have ignition but NO engine will run without proper fuel flow.

Jul 31, 2015 | 1995 Triumph Triumph Thunderbird

1 Answer

My e series 142 spins the chain and idles insanely fast when I have the choke pulled out. Then when I give it throttle it calms down and then I can barely keep it idling. with throttle all the way pulled...


Check air filter- clean or replace, Make sure you have fresh fuel, A new spark while you are giving it a service, Do you know how to tune the saw? Start with basic settings 1 turn on the low and 1 turn on the high And adjust from there, You might have turned the idle up too high. The choke should always be fully in when saw is running. Hope this is a good start

Oct 04, 2013 | Husqvarna Garden

1 Answer

2003 yz 250 starts and idles but runs rich and bogs as soon as the throttle is applied


Hi, Anonymous and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Intake system air leak.
4. Vacuum piston malfunction.
5. Accelerator pump leaking or no output.
6. Plugged bowl vent or overflow.
7. Fuel level in bowl too low.
8. Restricted fuel supply passages.
9. Plugged jets or passages.
10. Worn or damaged needle or needle jet.
11. The enrichner valve not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2002 yz250 idles fine but bogs and tries to die when twisting the throttle...
Bike dies when you give it throttle
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Mar 19, 2012 | 2003 Yamaha YZ 250

1 Answer

I just bought a 2004 Honda Shadow 600cc that had been sitting for a while. When I pull the choke the engine will idle but as the choke hits the middle the bike dies. also once its running I have to ride...


Sounds like you have a float sticking in your carburetor, is this a single carb or a duel carb? , also gas can go stale and your bike will run like **** if it also has been subjected to tank condensation and water in your gas, that also maybe your problem, I would drain the tank and drain the carb or carbs, and start off with fresh gas and would use 89 octane or better, also pickup some StarTron Enzyme gas treatment, it will stabilize your gas for up to 2 years, and remove the ethanol from your gas, that is a bad for your motor, try it you will never go without it. Good luck, Rick.

Aug 06, 2011 | 2004 Honda VT 600 C Shadow

1 Answer

I have a 2003 ttr225 I can get the bike to start with the choke on ihave to let it warm up for an extremly long time before I can push in the choke . once the bike is warm and I hit the throttle hard ,...


Sounds like the idle circuit in the carb is restricted. The engine is running on the choke only. When the engine reaches a certain temp the fuelthat does get is more readily burned allowing you to back off the choke. The choke probsbly can't be completely opened? right? Fuel quality is also something to consider Oil content in fuel affects combustion temps and volatility. _good luck_Ned_



Nov 16, 2010 | 2003 Yamaha TT-R 225

1 Answer

Need to drain gas from 86 intruder has been sitting for over a year and will start and run but when give it throttle it will miss and die. have to keep choke out to keep it running but will still miss....


Once a bike sets for a year the fuel breaks down a little and dirt and silt settle out of it and create this nasty sludge that will completely clog your carbs. The choke creates an area of low pressure inside the throat of the carburetor that helps to pull additional fuel through the jets and such. When you turn the choke off your fuel flow is once again restricted by your clogged jets that it cant get enough to run. Your going to have to pull your carb and go through it with pipe cleaners and B12 break cleaner. Hope it helps.

Jul 25, 2010 | 2001 Suzuki VS 800 Intruder

3 Answers

Went i star the bike i open the choke to warm the bike after a few sec close the shock the bike die runs only with the choke open what can be


This is a classic example of a clogged pilot jet in the carburetor. You need to clean the carburetor circuits and jets.

Jun 25, 2010 | Motorcycles

2 Answers

When i give my pit bike throttle it cuts off, when it first starts its real low rpm and when i give it throttle it makes a grinding sound and dies, i can restart it but it keeps doing it


Check first your carburator settings to make sure that it is running properly and not choked. If that doesn't solve it then there could be something broken or messed up anywhere from in the clutch system to the gearbox depending on what the drivetrain is.

Jul 28, 2009 | Pit SSR 110CC Pro Beginner Bike

1 Answer

Engine starts but dies when I pull throttle trigger


you need to adjust the high speed needle turn it out in 1/4 increments as you throttle it, low speed may have to come out alittle but do high speed first. I had to answer this as I use to have a pastor john in sturgeon bay, miss him alot.

Jul 22, 2009 | Ryobi Garden

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