I blew up my BRP about a year ago. Broke the timing chain and bent a valve. Al Bakers XR'x only did the valve job, new valves springs and seats. New piston, rings, timing chain, guides and tensioner, HRC Cam, Stainless exhaust and head pipe. Started on the third kick. Run's pretty good for not being dialed in. Problem , runs about two minutes and blows the rubber cam cap off like a champagne cork and spew oil everywhere. Tore it back down looked at everything , still scratching my head. Ideas where I screwed up ???????