Question about 2004 Yamaha V Star 1100 Custom

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My vstar 1100 doesn't throttle down while shifting gears so I am power shifiting. Also while coasting to a stop the idle stays high till I bog it down with first gear. Is this the throttle position sensor? If so what happens if you just unplug it?

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  • Yamaha Master
  • 43,091 Answers

Hi, Prvtpilot199 and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Yamaha Star 1100 Throttle problems
http://www.starbikeforums.com/forums/49-v-star/1194-rpm-slow-return-idle.html
Yamaha XVS1100 Service Manual
OEM parts for Yamaha
YAMAHA XVS1100 Owner Manual

Posted on May 28, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

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fastboyz
  • 674 Answers

SOURCE: QUAD QUESTION! 1998 yamaha warrior 350 bogging down

sounds like fuel starvation
do you have a petcock plugging or a dirty carb?
pull the fuel line and check flow
later paul9477792.gif0e30a9b.gif

Posted on Nov 17, 2008

  • 11 Answers

SOURCE: 2005 VSTAR 1100 Silverado Backfire

Are you running on original pipes or have you installed aftermarket pipes that are louder ?? I had the same problem with aftermarket pipes and come to find out my carbs were not jetted the way they were supposed to have been done when I installed the pipes.Also there are two chrome tubes starting at the front of the engine going under the seat towards the rear--- there is a rubber hose connection connecting each side .You should disconnect these hoses and bypass the tubes-- in other words use one hose to connect the front two tubes together and the other to connect the rear tubes together , its some sort of early emmission thing that will cause some backfire

Posted on Apr 23, 2009

wayneman01
  • 301 Answers

SOURCE: my vstar 1100 dies when in idle. acceleration is

Is the idle speed set too low? If so, adjust it, using the idle speed adjusting screw, to the correct idle speed (900 RPM). If that's not the problem, then check for air leaks between the carburetors and the engine by spraying WD-40 around the intake manifolds with the engine running. If there is an intake leak, the engine RPM will change briefly when the WD-40 is sprayed near it.
Aside from that, there are two other things that can cause your engine to die when it should be idling: the idle speed mixture adjustment, or low cylinder compression. Of course, if it was idling fine before, and the idle mixture adjustment hasn't been changed, then do a compression check, first. To idle properly, each cylinder's compression needs to be at least 140 psi.

Posted on Nov 19, 2009

  • 221 Answers

SOURCE: XVS 1100 idle

at sea level there is 14.7 psi of air pressure, the higher you go the thinner the air. thus, need more air and less fuel. adjuster your idle air screw mixture.

Posted on Dec 27, 2009

mxtras
  • 194 Answers

SOURCE: Vstar 1100 idling rough and backfiring letting off the throttle

It sounds to me that your carbs might be a little gunked up - you mentioned the gas may have been old, so it's possible that the smaller (idle) jets are slightly plugged up. Fresh fuel might do the trick and/or you could try using a fuel system cleaner and water remover. This problem might 'solve itself' with a little time.

As far as the backfire - this might be either from the carb issue or it could be related to that rattle you mentioned - you could have a loose connection at or near the head - this can **** air and cause a backfire.

I hope this helped!

Posted on Jun 10, 2010

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