I just wanna ask around and see if there is any truth to this, but i was talkin to some friends who said that the old 628 hrc kit bikes that ran baja had some issues with case failure and tranny failure. Somethin about the cases couldn't handle the added power and the baja gearset in the tranny stressed the cases and cracked them... He mentioned that the gearing up of the bike caused it to hook up almost too good and stressed it to the point of breaking. Has anyone had issues with increased compression or the big bore kits on there bikes? The only thing i found on the net was they referred to campbells xr600 as "the hand grenade". For being unreliable but it didn't go into datail...Just trying to shed a little light on this story. Thanks guys.