my engine died this weekend. during a main on a muddy track something stopped flywheel on the spot after landing a double and hitting the throttle for the next one. conrod snapped at the strongest spot. either too much mud or I hit a rock. poor engine. everyone was amazed with it.

will pick up a new one on my US trip next week. will try race prep this time so I can compare and it it is too harsh for a buggy i will be back in the US in June to get a full mod again

one question - when I took the engine apart to see what went wrong I noticed lot of dirt between the crankcase and head button. Is it because of shimming for 30% nitro leaves there a small gap?