is my speedfight engine broke ?

it could aslo be a main bearing breaking up and rumbling this will transfer the metal parts up through the transfer ports and damage the piston causing lower compession and less power and speed.does it make a metallic scoring noise while its running?and does it get louder with the revs increasing ?

adam bike doctor
May 2010

you need to check your transmission, could be your clutch shoes broken

m
May 2010