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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
} 28.6%
} 14.9%
} 10.2%
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
} 38.1%
} 24.4%
} 19.4%
2nd 1.640:1
3rd 1.240:1
4th 1.000:1
Overall reduction 1st – 4th 62.3%

BSA B50 4 Speed Gearbox

Price £1625.00

+VAT (if applicable) & Carriage.

Nova assembly: 13

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
} 28.6%
} 14.9%
} 10.2%
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
} 38.1%
} 24.4%
} 19.4%
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

Price £86 .00 each

+VAT (if applicable) & Carriage.

Nova: 02102-000