Question about 1985 Yamaha FZ 750 FT (U.S.)
Clean air filter and set sparkplug gaps at 0.8mm. Replace if overly dirty. Without using throttle or choke at all, set idle at 1000 revs using idle adjuster and then turn air mixture screws in or out to find the higher revs. Reset the idle adjuster back down to 1000 revs. If problem not fixed, move the throttle needles up one notch on each carby. (the link below has an exploded view of the carburetor and name of parts for reference) Failing this you maybe in for a top end service as the valve seats, cam faces or compression rings maybe at their wear limits.
Goodluck and Cheers.
Posted on May 11, 2010
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Posted on Jan 02, 2017
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