I have a 98 600 mm with smart carbs and need some help. When I run it up to to high rpms and let off on the throttle and pin it again it falls on it's face. I've jetted it, cleaned the carbs. Any ideas?
Yamaha 600 mm smart carb trouble
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If Your jetting this smart carb u shouldnt be if its all hooked up. I've had two of these sleds and one delt me fits the other ran fine the first thing i found wrong was the bolts were coming loose in the crankcase halves. I forget exactly how many sensors there are, believe there are 7 or 8 total 4 in the carbs and the rest are up around the are box i finally replaced all the sensors to fix the way it was running sometimes it would smell rich cause it wouldnt lean out then at times it ran like what ur describing. the main jet should be #160
If Your jetting this smart carb u shouldnt be if its all hooked up. I've had two of these sleds and one delt me fits the other ran fine the first thing i found wrong was the bolts were coming loose in the crankcase halves. I forget exactly how many sensors there are, believe there are 7 or 8 total 4 in the carbs and the rest are up around the are box i finally replaced all the sensors to fix the way it was running sometimes it would smell rich cause it wouldnt lean out then at times it ran like what ur describing. the main jet should be #160
Those smart carbs cost me 2 engines, wouldn't compensate fully didn't know they were till I was on wot pulls and it was too late, swapped to lectron carbs and enjoyed the machine till it was sold
