broken reeds will ONLY casue it to run rich. NOT LEAN! it was either running lean or the ignition timing is retarded. either will cause the exhaust side of the piston to burn. my guess is lean. high EGT's caused the piston to burn. get it rebuilt and check that jetting!also low water level will cause overheating and will be shown as seizure marks all the way around the piston.
__________________ 
Last edited by MysticMotorsports; 05-02-2008 at 05:35 PM.
|