| Also known as | 40-242 |
| Diagram | CRANKCASE |
| Subsystem | engine bottom |
| Listed in parts books | Not catalogued by year yet |
Screw, tachometer drive (2 British Association × 27/64" countersunk)
2 BA countersunk screw, 27/64 inch, for securing the tachometer drive at the crankcase.
This is the small screw that secures the tachometer drive at the crankcase, per the catalog listing under 40-0242. It's a 2 BA countersunk screw at 27/64 inch, the size and thread called out right in the parts book entry.
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It shows up in the CRANKCASE figure for this era of engine, holding the tach drive housing or cover in place at the bottom end. It's a small fastener but it's the kind of thing that walks off or strips out over the decades, so if yours is buggered up or missing, this is the one to replace it with.
Our catalog record ties it to appearances across 1969-1970, so double check it against what's actually on your crankcase before you order, especially if your bike falls outside that window.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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