Normally when I do my head bearings,albeit on my present Gas Gas(and numerous other motos),I would tap the collar washers with a blunt bar...and loosen them off that way.
To know if they're tight enough....with the wheel off the ground tap the bars to see if they will swing nice and smoothly from opposite lock left and right...when they can do that with no play I would tighten the locking washer....
Just another suggestion....
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__________________
The Suit:What would you consider to be your greatest weakness?
Me: Honesty.
The Suit: Honesty? I don't think honesty could be construed as a weakness.
Me: I don't give a f**k what you think.
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