| Listed in parts books | Not catalogued by year yet |
SERRATED WASHER
A serrated lock washer, part number 42-4075, used under a fastener to resist loosening from vibration.
42-4075 is a serrated washer, a small item that shows up in the hardware end of the catalog rather than as a headline part. Serrated washers like this one bite into the surface they sit against, helping keep a bolt or nut from working loose under vibration.
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We don't have detailed fitment history on this particular number, but the catalog reference does connect it to a gearbox mounting lock bolt, so this washer likely does its job holding a gearbox mount fastener secure. Beyond that, our records on this one are thin.
If you're chasing down the exact application for your bike, give us a call and we'll confirm fitment before you order.
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