Question about 2004 Yamaha V Star Classic

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Yamaha 650 v star tps,.. how do i find it on a 2004...then how do I test it to see if its the problem??

My son bought this bike recently,..has 40 k miles on it. Has been sitting for a couple of months before he bought it. The throttle cuts out when he's accelerating at higher rpms. It's not the cut out, because it happens in the middle of a gear sometimes. Please help. It's been in the shop twice,..rebuilt both carbs,..valve job. ...etc...still doing it.

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I would still think this is a carb issue. Most techs stink at properly rebuilding carbs because there are so many different kinds.

I however have spent 15 years honing my carb skills to perfection.

If the bike was purchased from a person at a higher altitude, main jet size might be incorrect. Or if it has modifications to the exhaust or intake - also main jet.

Contaminated or old fuel could also be a factor - have you drained the tank?

The TPS has to be set and checked with an olm meter. The TPS controls the CDI second timing curve which may have failed. I have seen this many times!

Posted on Apr 04, 2014

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Posted on Jan 02, 2017

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cape cod bob
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SOURCE: Yamaha V-Star 1100 Custom stalls when downshifting

sounds more like a fuel problem to me. is it cold there did you use stabilizer in the gas? try some berrymans B12 in the gas it cleans everything up internally. it worked for me

Posted on Mar 21, 2009

  • 52 Answers

SOURCE: 2002 Yamaha V-Star Classic 1100 Will not run over 70 MPH

Hi,
The first thing you need to check is the air filter. Sometimes critters can get into the airbox when a bike sits for awhile. Sounds crazy, but it has happened to me. If nothing is blocking the filter, give it a quick clean since you have it out.
Next things to check:
Faulty diaphragm
Improperly adjusted fuel level
Clogged or loose main jet
Faulty fuel pump
You may not be able to check these on your own, but these are the next likely culprits.
Hope this helped

Posted on Mar 11, 2009

  • 112 Answers

SOURCE: wiring diagram for bike

You can go to your local dealer and they usally will copy it out of ther service manuel for you.When you say passing lights do you mean highway lights?

Posted on Mar 29, 2009

  • 53 Answers

SOURCE: R6 hesitation when starting out

Not often i see good questions like this. I would start with riching the carbs a bit. Another possible simple solution is to get your plugs check to make sure they are firing at full capacity, either one can cause the problems you have described. My first guess though would be the carbs, it sounds like the throttle is set a bit off to what it should be at. The fact that your bike runs fine otherwise also suggests this conclusion.

Posted on Jun 16, 2009

herbmeister
  • 7 Answers

SOURCE: Engine cutting out when open throttle. YAMAHA NEOS 50cc MOPED

i had a simuler problem with my honda cr 250 moto-x bike it would start fine and you could keep it ticking over with the throttle(i have deliberatly unscrewed the tickover in case i come off,it will cut out) when i got on it,it would go for about 400-500 metres then splutter and die and not start again for around 5 mins. i immediatly knew it was a fueling problem. so after stripping the carb and giving it a good clean out i was baffled when i got back on and it still done the same. i then dismantled the fuel tap cleaned it all out and put it back together and tested it,it was very very slow so i unsrewed my fuel cap a little and was greated with the familur gush it should deliver. problem solved! the vent in my fuel cap had crystalised up,so the fuel was coming out but the air was not getting in,causing a vacuum and slowing down the flow and basically emptying the carb quicker than it can fill back up!!! clean your carb,fuel tap and any vents in your cap or tank. if this does not work then your bike must be over fueling or low on compression.

Posted on Sep 18, 2009

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