???My ventilator hose managed to work its way and not only pinch its self in between the fuel pump and starter, but it kinked at the other end. this happened over the course of three races this past weekend @ summit point. On the third race, MW superbike am, the pressure was so great that the oil blew out the vavle cover gasket; the tabs where the camshafts are. they flagged me and I pulled off the track.
Now I cant get the bike to start. I checked all the plugs, they were black, no aluminum, so thats good. I checked for spark, and they spark. The engine does crank over and sounds quite normal. The funny thing is that after 3-4 seconds of trying to start it (durring that time I hold my thumb over the case ventilator) it builds up excessive pressure which I feel with my thumb. I haven't done a leakdown test (don't own the tool.. yet). Is it possible that perhaps the piston rings are damaged? can the pistons be forcing the fuel/air gas into the crank case during the compression stroke? I'm confused on this one... The bike is an 89 FZR 600, I have a wiseco bigbore piston kit w/ 1000 miles on it.... what do you think???