Maybe. I think what might have happened is that when i had it in the shop we took a look at the top end and we saw some scaring on the left pistons exhaust side. I asked if we needed to rebuild it and they said it would have no problem making through the season. I think the rings were worn and it was letting air through because the piston has black down that skirt side. i only had a problem when the bike got hot after running down the drags a couple times in a row. Either way i am rebuilding the whole thing with Jasons (from the forum) he is a mechanic. Then we will adjust the mains and pilots. Ill post up all mods pretty soon. but i usually ride in the imperial sand dunes, ie glamis, gordons, super, buttercup, oglby, ect.