66cc, M7 or M8?

DanielMaia

New Member
Hey there guys!

Another engine i have here, and, one day..i just tighten too much a stud, resulting on a stripped off stud (we only learn by the bad way)

Im going to put a Helicoil..but have a doubt, it is M7 or M8? the stud it self it has 7.60mm, on the side of 1.0 thread. But the hole in the crankcase, has 6.6 or 6.7mm

What size of helicoil should i buy?
 
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