Backfire and crappy running after bottom end replacement

GoldenMotor.com

Super

New Member
Sep 19, 2011
39
0
0
Texas
My chain jumped off the sprocket and wedge in between the sprocket and motor housing. It tore a hole in the housing and quit running. I assume this is because the housing needs to be sealed in order to create the suction it needs to pull fuel from the carb. I bought a new bottom end and put it on last night. I haven't adjusted anything sense the original bottom end was on. I figure it should run the same without any adjustments. But it's not. It is backfiring every few secs while I rev it up at a stand still. When I try to ride it, it has hardly any power and I couldn't even get close to full speed. It's not bogging down just sounds different and has no power.

What do you guy think I need to do?
 

Super

New Member
Sep 19, 2011
39
0
0
Texas
As a matter of fact yes. There is fresh oil on the top seal part of the top end piece. The metal gasket one. The gasket is new but I did put it on and take it off once without running it.