This weekend I finished running in my TM928, all went great, eventually started running 80-90% full, and for the first 2 fuel tanks i was as happy as can be, then I started staling, at least once every lap maybe two laps, the track no it all told me I need to add spacers in my motor and that the compression is to high, my concern is that I ran 2 fuel tanks through it without this problem, how sure can i be that this is the actual problem?