has anyone done any special porting on a stock flat reed top end?
are there any gains to enlarging the "boost" port, or 3rd transfer rather?
also who has a really ripping modified 50cc derbi?
has anyone done any special porting on a stock flat reed top end?
are there any gains to enlarging the "boost" port, or 3rd transfer rather?
also who has a really ripping modified 50cc derbi?
Want to post in this forum? We'd love to have you join the discussion, but first: