Re: Head stud kit
Your engine is not unique as far as the studs being different threads on each end. In fact the majority of the 2 strokes I've worked with have had 8mm studs that had a 1 thread on one end and a 1.25 on the other. The fine threads went into the case and the course thread was on top, at the cylinder head.
As long as you're replacing those studs you might as well toss those stupid acorn nuts and replace them with shouldered hex nuts too. The acorns are notorious for bottoming out before they are tight against the head. My experience anyway.
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