Re: Some help with centrifugal clutch install
The L key is simply a standard woodruff key filed down on 1/2 of one side and poorly looks sorta like an L. Grinding a full groove into the clutch hub can be daunting to some and the L key is a workable shortcut to enable you to simply grind a short notch into the hub instead of a full groove. You need to patiently grind the notch and file the key a little at a time, checking the fitment frequently, to end up with a snug fit between the two to obtain the best results.
As rohmell stated though, sometimes you get lucky and the parts fit well enough to forgo the key all together. This is a judgement call that the builder must make during assembly.
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