98 grizzly 600 flywheel and Woodruff key

mattgerb17 · Sep 23, 2025

Currently doing top end, and timing chain on my grizz. Pulled the flywheel off tonight and saw this is the keyway.

Woodruff key looks fine

And crank looks fine.

What's my course of action from here? File the flywheel so its square again? Id really prefer to not buy a flywheel as they are about 500-700 CAD.

Thanks guys!

reogem · 2025-09-23T06:40:52-0400

Personally I would carefully file back. It is important to torque the nut to the proper ft-lbs

Ridgway81432 · 2025-09-23T10:01:25-0400

I would install a new woodruff key: Too cheap as the old one has an irregular wear pattern.

DrewL · 2025-09-25T18:35:35-0400

I’d file it and install a new key. Dremel might be easier if it’ll reach?

98 grizzly 600 flywheel and Woodruff key

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