Al Smith
Mac Daddy
Well that brings up another thing .On those crotch rockets of the woods they might offer half a dozen piston sizes or at least they used too .Just rebore the thing and sock the next size in it .The old kart engines were the same . Unfortunately on saw engines that option is a little more involved .Thanks Al, yeah I was thinking of true competition saws, you know like the motocross bikes with engines so on the limit that they only last one race meeting.