I'm trying to assemble the fork tubes on a '78 b750. A book I have says to apply thread sealer to the threads and shoulder of the bolt that attaches to the piston, and torque to 35 to 40 ft/lbs. What type of thread sealer do you recommend? And does 35 to 40 ft/lbs seem to be too much for a small bolt like that? And if that is the correct torque spec, how does one keep the piston from spinning while torquing? Thanks.