| Also known as | 41-603 |
| Diagram | Fig. 5 — OIL PUMP, GEARBOX SPROCKET · ref 11 |
| Subsystem | gearbox |
| Listed in parts books | 1969–1970 |
BSA Oil pump driving gear
An oil pump driving gear that turns the pump off the engine, listed under both the oil pump and crankcase figures.
41-0603 is an oil pump driving gear, the part that turns the oil pump off the engine's timing side so lubrication keeps moving whenever the motor is running. It shows up in the catalog under both the OIL PUMP, GEARBOX SPROCKET and CRANKCASE figures, which puts it right at the junction where the pump gets its drive.
Read more
The catalog also lists it as 41-603, an alternate form of the same number rather than a different part. Our records tie its appearances to 1969-1970, though we don't have more detail beyond that on which specific models it was fitted to, so confirm against your engine before ordering.
If you're chasing an oil pump drive issue or doing a bottom-end rebuild, this is a small gear but it's not one to guess on. Have your engine in front of you or your parts book open so you're matching tooth count and fit correctly.
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.
Sorry if we got something wrong here. If you think this information isn't correct, .