Finally a viable 4 speed competition option to the old BSA unit single gearbox.
All designed and manufactured in house.
Using our splined mainshaft to go with our clutches for optimum performance.
| 1st gear | 15 | 20 | 1.905 |
| 2nd Gear | 18 | 17 | 1.349 |
| 3rd Gear | 19 | 15 | 1.128 |
| Top Gear | 20 | 14 | 1.000 |
PES 4 SPEED RACE GEARBOX BSA B50 NEEDLE BEARING GEARS A100
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