XT 600e not running right (2003 Model)
Hi all. I'm new to the single cylinder biking scene. I've got myself a 2003 XT600e. When I first got it it seemed to hesitate a little low down in the revs, below 4000, but it wasnt really noticable. As time went by it got worse, and lurches below 4000 and also developed a flat spot around 4000. It even lurches when you let go the throttle and coast down to a stop (in Gear) coming up to traffic lights. The only time it runs right is full throttle and just below that. Ive had it down the Yamaha dealer and they had the carbs apart several times and cleaned them thouroughly. I also had it Dyno'd and this showed lean fueling below 3000, which Yamaha then fixed. But after all this, its still not right. I think its time to look elsewhere on the bike, not the carbs. I've serviced it before yamaha got hold of it, changing everything to new, even the air filter, so there's no external blockages. Spark plug was changed again by Yamaha just to be sure. Do I have a lemon?
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