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??
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!
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