not good

[nestor1018]

ok so me and my wife are riding shes on her blaster and it stops running and and wont start back up so i pull the plug it def. was done so i put in a new plug and right away it starts up so i let it run for a min and i hear a bad scraping in the motor....dose anyone have advice??

[houle54]

Sounds like u need to rebuild the top end bore and hone the cylinder. new piston If the piston has come up and banged the head or there is a hole i would throughly clean the lower crankcase and check the bearings condition of piston rods and crankshaft. Just to be safe. mine did almost teh same thing and I didn't check the lower engine out my top end rebuild lasted 20mins before the bearing gave out and sent the piston up too high.

[nestor1018]

ok so i tore down the bike looked in the cylinder and the walls were fine the piston looks fine is there anyway all the sounds could have been the crank barings and if so will i need a new crank??