I wasn't so much trying to second guess Yamaha's torque spec,as thinking that with the amount of experience you guys have with this motor maybe you'd found a foot pound or two more or less was better.I really should have known better than to re-use the head bolts.I've got new ones on order, and I'll also use the copper coat Rich recommended,I put the gasket on dry last time.As far as studs go,would it be worth it to call someplace like APE or Orient Express that sells heavy-duty studs for drag bikes,and seeing if they have the correct size studs for the YZF? With the amount of attention the crank needs in this motor, thaking it out of the frame every once in a while shouldn't be too big of a problem.If this motor were converted to studs and nuts would the torque setting change depending on the stretch of the studs?Sorry so many questions but I'm trying to learn all I can about this motor ,I plan to keep this bike a long time. Thanks again.