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After 2,000 miles of poor performance, dealers telling me I "don't know how to ride a sport bike", and other such nonsense, I finally found a repair shop that listened and was knowledgeable enough to fix the problem!
Problem: After installing an Akrapovik exhaust and DynoJet Commander V controller - at a dealership where I bought the bike, by the way - the bike stalled randomly when throttle was applied and the engine flooded at below 6000 RPMs (e.g., riding in town).
Background: Yamaha Corp. wouldn't do anything about it and two dealerships said it performed that way because I was an inexperienced rider (despite the fact I've been riding for about 40 years). No, I'm never going back to those dealerships unless forced to do so because of a warranty repair.
Solution: Factory setting for the Commander V was too lean on the low end of throttle application and low RPM cruising speed. The 13.8% air /gas ratio mix ("ideal") was off by a lot at the beginning of throttle application (stalled when throttle applied) and at below 6000 RPMs (too much gas, not enough air).
Manually adjusting the DynoJet air / gas ratio to the desired 13.8% from the factory settings completely resolved the problem. I did everything I could to cause it to happen this afternoon - 3000 RPMs in fourth gear, repeated super slow application of the throttle, etc. - and I couldn't get it to stall or flood.
Hope this helps anyone experiencing similar problems. Good luck and ride safe!
Problem: After installing an Akrapovik exhaust and DynoJet Commander V controller - at a dealership where I bought the bike, by the way - the bike stalled randomly when throttle was applied and the engine flooded at below 6000 RPMs (e.g., riding in town).
Background: Yamaha Corp. wouldn't do anything about it and two dealerships said it performed that way because I was an inexperienced rider (despite the fact I've been riding for about 40 years). No, I'm never going back to those dealerships unless forced to do so because of a warranty repair.
Solution: Factory setting for the Commander V was too lean on the low end of throttle application and low RPM cruising speed. The 13.8% air /gas ratio mix ("ideal") was off by a lot at the beginning of throttle application (stalled when throttle applied) and at below 6000 RPMs (too much gas, not enough air).
Manually adjusting the DynoJet air / gas ratio to the desired 13.8% from the factory settings completely resolved the problem. I did everything I could to cause it to happen this afternoon - 3000 RPMs in fourth gear, repeated super slow application of the throttle, etc. - and I couldn't get it to stall or flood.
Hope this helps anyone experiencing similar problems. Good luck and ride safe!