| Diagram | GEARBOX SHAFTS AND GEARS |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
Layshaft c/w high gear (18T)
A gearbox layshaft fitted with its high gear (18 teeth), per the 1970 catalog record.
This is a layshaft complete with high gear, the tooth count on that gear given as 18T in the catalog record. It lives in the gearbox, specifically in the shafts-and-gears layout, where the layshaft carries a set of pinions that mesh with the mainshaft gears to give you your ratios.
Read more
The manufacturer tag on file for this part reads Lucas, but Lucas made electrics, not gearbox internals, so that tag looks like a mismatch rather than something to take at face value. Our record only shows this part turning up once, tied to 1970, and doesn't name a specific model or engine family, so we can't tell you off the bat which gearbox casing or which bike this shaft belongs in.
If you're chasing a layshaft for a rebuild, bring in your existing shaft or the casing itself so we can match it up. Call the shop and we'll confirm fitment before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .