| Diagram | Fig. 5 — GEAR CLUSTER · ref 107 |
| Listed in parts books | 1969–1970 |
BSA Spring, gear control plunger
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This is the gear control plunger spring, PN 40-3155, a small piece inside the gearchange mechanism. It works with the plunger that presses against the selector cam or quadrant, giving the gear change its detent feel so the box holds each gear cleanly instead of drifting between positions.
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It shows up in the gearbox parts-book figures for gear cluster and gearchange mechanism assemblies, appearing across catalog listings from 1969 to 1970. It's a small, inexpensive part to have on hand if your gear selection has started feeling vague or if the plunger isn't seating with authority.
We don't have more detail on this one beyond its place in the gearchange mechanism. Call the shop and we'll confirm fitment before you order.
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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