head

Hi, Just wondering what is a good piston to cylinder head clearance, and piston to valve clearance? And which cams offer the best valve clearances? ie. 01, 53, 55, 08, X1, X2, etc. Also, what is the thickness difference between the thick and thin head gaskets offered for the 01-03 motors...

I've done an event today good event very fast going,after it finished I noticed a berg being towed back it belonged to one of the sponsored riders I went across and asked him what had happened and he pointed to a hole below the plug side exhaust port right on the edge of the head face and head...