Even if it does go BOOM every three runs, it's a damn SOHC block... Dime a dozen motor.. Hell I think I have a few that have been in the backyard so long they have actually become part of the landscaping back there. That's the only reason I would work with SOHC motors... blow the **** out of it running twice down the track, pick up another one for $100, rinse, wash, REPEAT.