i have recently bought a 50cc speedfight and it is was compltly standard and topped about 34mph i have just fitted a sport exsaust and now it seems to be goin slower what could be the problem
Some Exhausts have a restricter in them. look down the top of the exhaust at the front and you'll see a small washer, remove it.
Slow running: Make sure the Throttle and Oil pump are set up right, loss of compression, Brakes binding, Air filter clogged.
Hope that helps :)
paul, Dorset
October 2008
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix motorcycles.