So I reccently rebuilt the top end on my 2013 YZ450F. It has a ported head and stage 2 cams with an akrapovic header and tail.
The first ride I had the motor lock up, I stripped her down again and noticed the cam chain was binding at the bottom.
Replaced the cam chain and rebuilt the motor with the same gasket (had less than 10 minutes)
Yesterday I took her up the rode to check and noticed oil dripping out the head, only to notice the head gasket is blown.
This is the second time its done it, although both times I didn't replace the head gasket as it was always right after replacing.
I'm hoping this is just because I used the gasket twice, the coolant level never dropped and I didn't see any smoke.
Any other signs that I should look for?