I am having trouble sealing the head gasket.. it keeps leaking after about 2 hours running. I have 175 psi, use new gaskets, and VHT copper adhesive sealant. I am using about 12-13 ft lbs torque. Can I use much more with the standard studs? How do you re-torque these motors? Hot or cold?? Help Jack....

 

Are the head nuts loosening?

 

Yes, they do seem to be a little less tight on the right hand rear... does this mean that the studs are pulling from the case???
Can you tell me the procedure you use to torque and re-torque the head?
I have only just started getting this problem since the last rebuild... it was fine all last season. Your motor is still smoking the opposition... 5 wins from 5 at the last mx event.... I have reset the squish band and now it pulls 9800 all day long!
Thanks for your help..