I have fitted different exhaust(with the tube removed) i have fitted a bigger main jet (from 52 to 78 )i don't want this to go too fast just have a bit more than 30mph,i have replaced the rollers with the same weight but new( the old ones were getting flat in places).
The problem i have is it still only goes at 30mph and it is hesitant until it's warmed up,is there anything else i can do to get a few more MPHs

Gethro, July 2008

A good one for the belt driven bikes is to fit a new belt. They rub smaller and dont give you the top end you want.... I know this reply is 3 years late but posted for other ppl to see...

Miniman, March 2011

Forgot to add there is no restrictor in the variator,so it looks like it has been derestricted before,i have made a couple of holes in the air box cover(which were already there but filled in)
I have now had it up to 38 with a struggle....any advice on my next move

gethro, July 2008