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Shop/Category/Fig. 12 — GEARBOX COVER – GEARCHANGE – KICKSTART CRANK/Screw – outer cover to crankcase (¼" UN.C X 5⅜")
Screw – outer cover to crankcase (¼" UN.C X 5⅜")
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DiagramFig. 12 — GEARBOX COVER – GEARCHANGE – KICKSTART CRANK · ref 21
Subsystemgearbox
Listed in parts books1973

Screw – outer cover to crankcase (¼" UN.C X 5⅜")

Quarter-inch UNC, 5⅜-inch screw securing the gearbox outer cover to the crankcase.

PN · 21-2139

This is a screw that holds the outer gearbox cover to the crankcase, quarter-inch UNC thread, 5⅜ inches long. It's a fastener, not a glamour part, but it's the kind of thing that walks off a bench or snaps when someone tries to force a stuck cover loose, so it's worth having the right one on hand rather than substituting a generic hardware-store bolt of the wrong length.

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Our catalog record shows this one tied to the gearbox cover, gearchange, and kickstart crank figure, with a single appearance in 1973. That's a narrow window in our records, so if your bike is outside that year, check the length against what's actually on your cover before ordering.

Getting the length right matters more than it looks on a fastener like this - too short and you won't get proper thread engagement into the crankcase, too long and it can bottom out or interfere with something behind the cover.

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