UR B-hind Da 8 Ball
Join Date: Jun 2004
Location: East TN
Bike: '03 R6, XR400, 79 GS550
Re: 03 Yamaha R6 idling/stalling issues- TPS or something else?
You are about in the range that valve clearance issues start showing up (18-20k miles, or 30-35kms). Those issues typically start with idle issues when warmed up, then progress to the point where starting up becomes a problem.
Also you need to verify that your coils are good. Spray some water on the headers when it is acting up and see if any of them evaporate slower than the others. Swap the couple on the slow cylinder with a fast drying one, and see if the issue follows the coil, or stays put.
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I find a Soap Box comes in handy to get on my High Horse!