Best way to torque crank bolt
I just take a 1 1/4 socket & 1/2 drive ratchet, tighten the bolt till the crank turns...then whap it real hard with a lil sledge hammer a couple of times.
I've never had one come loose, no loc tite.
And I wind these motors up past 7k, and also keep good pulley alignment.
Flame away, ha ha ha