Got a 87 KDX200. I am having some trouble getting the fuel/carb/plug dialed in.
I have the carb jetting setup per the Fredette recommendations and the reed specs.
I can't get good plug color. The plug sometimes fouls, but mostly has hard carbon build-up and the bike/carb only seems
happy when I am above half throttle. I have gone to a hotter plug (B8ES) with some improvement. I went to the first needle clip position (Fredette specs call for position 2).
And recently went from 32:1 to 40:1. The results are not in from the fuel/oil ratio change. Will the 40:1 hurt the old gal (the bike that is).
Am I trying the right things? What's next? It seems to be OK if I ride it hard, if I play ride it fouls up pretty quick.