Join Date: Aug 2010
Location: Ontario, Canada
Rep Power: 1
You have to take it apart and inspect/troubleshoot before ordering parts.
I raced two-stroke MX'ers and they are very easy to work on. We did rings every two races and piston/rings every four races, so the motor was apart twice a month. It's really easy stuff.
Seat off, tank disconnected, tank off, pipe off, cylinder head off, carb off, cylinder off, immediately stuff a clean rag in the crank case hole so nothing falls in, inspect.