LARRYD wrote on 06/24/10 at 20:44:23:Ok , I removed both side covers and checked everything that could make that rattle knocking sound , cam chain,trigger coil, checked valves again ect. The tentioner is 16mm 0ut I guess the odometer is wrong. Could the tentioner still be making a knock under load ? If not what is probable the valvetrain , rod bearing, or crank bearing ? Or ? Thanks everyone.
Last thing I know about that could be it... burnt piston.
It made a definite knock. The guy I bought it from said it lost power at speed, then died. listened to it with a stethoscope and sounded like it was in the case. seized up wrist pin, piston melted and seized up the rings. Compression was 106 psi