ys fz110 (not the s version)
if any one can help here is my problem.i have an fz110(remember them).i got it second hand and when i ran it in the stand the rear bearing gave way.so i rebuilt it with new bearings,o rings,gaskets,front oil seal,piston ring,diaphram the lot.i have run about 3 tanks through it.i have since run it on yamada mix and bekra 30.it idles sweet on either mix.transition seems to be ok.though there is a little bit of spitting from the carb.holds steady 4000rpm.but top end i cant seem to get any more than about 7500 rpm.have ran it wot and try to lean it but it gets to about 7400 and the starts to die likes its to lean.started with the high end about 1 3/4 out.this is with a master airscrew k series 15x8 prop.when i look at others on the forum they are getting into th 9000.have looked at the valve clearence and its good so i dont think its that.if the reg is a little rich would this affect top end?