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Discussion Starter · #1 ·
unfortunately when i had to replace the top end the only thing i could find were aftermatrket 60cc kits. now the bike has problems with full throttle openings, also, going down hill, the engine cannot keep up unless on full throttle (not always easy to do) and then won't pick up again properly, and either crawls along or dies. i believe the last 1/8 of throttle is controlled by main jet size, so do i need to change it? its currently a 70. The carb is a Mikuni (dt50m) and the bike is the later mx. the only difference being electronic ignition.
PLEASE HELP!!!
 
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