my m8s rd125lc is loosing power in top gear. pulls nice all the way to 5th put into 6th and it just keeps dying until your down to crawlin speeds, then your havin to nock the gears down to get back up to speed, and it all starts again any help i no he will appreciate...

it could be similar to some dt models, there may be a reed switch which restricts its top speed to 65 or so, usually found in at the speedo

nice1 how do you switch off.

what set up are you running ie tuning