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BSA B50 4 Speed Gearbox
Supplied as a complete assembly with selector forks, (requires only shaft support bearings). As standard we supply a mainshaft designed to accept the NEB clutch and is designed with an outrigger bearing arrangement for additional support. We also have a standard tapered mainshaft available on request.
1st | 15 – 20 | 1.833:1 |
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2nd | 21 – 20 | 1.309:1 | ||||
3rd | 21 – 17 | 1.113:1 | ||||
4th | 22 – 16 | 1.000:1 | ||||
Overall reduction 1st – 4th | 45.5% |
1st | 2.650:1 |
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2nd | 1.640:1 | ||||
3rd | 1.240:1 | ||||
4th | 1.000:1 | ||||
Overall reduction 1st – 4th | 62.3% |
BSA B44 & B50 Standard Replacement Selector Forks
Billet machined selector forks which fit the BSA B25, B44 and B50 engines. Made from EN36 steel and then Tufftrided to give a tough and durable finish.
1st | 15 – 20 | 1.833:1 |
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2nd | 21 – 20 | 1.309:1 | ||||
3rd | 21 – 17 | 1.113:1 | ||||
4th | 22 – 16 | 1.000:1 | ||||
Overall reduction 1st – 4th | 45.5% |
1st | 2.650:1 |
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2nd | 1.640:1 | ||||
3rd | 1.240:1 | ||||
4th | 1.000:1 | ||||
Overall reduction 1st – 4th | 62.3% |