Early BSA Transmission Parts

We're closed now for the Holiday break, we'll be back on deck from January 12th, 2026

Any orders received between now and then will go into the priority queue for immediate processing upon our return

Happy Holidays

Pre Unit Construction BSA Transmission Parts under Factory Part Numbers
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  • 15-2419 Clutch Plate
    Clutch Friction Plate
    Fits BSA Empire Star
    and M20 models with
    single spring clutch
    up to 1947 or so..
    Inside Diameter: 90.5mm
    Outside Diameter: 125mm
    NZ$ 27.85
    NZ$ 25.05
  • 15-4139 Spring
    Main Spring
    Gear Change Pawl
    BSA M & B Singles
    NZ$ 5.35
    NZ$ 4.80
    Out Of Stock
  • 15-4141 Pawl
    Gear Change Pawl
    BSA M & B Singles
    NZ$ 10.75
    NZ$ 9.65
  • 15-4142 Pawl
    Gear Change Pawl
    BSA B & M Singles
    NZ$ 10.75
    NZ$ 9.65
  • 15-4308 Clutch Plate
    Clutch Sliding Plate
    Fits BSA Empire Star
    and M20 models with
    single spring clutch
    NZ$ 107.35
    NZ$ 96.60
  • 15-4312 Clutch Nut
    Clutch Spring Nut
    Fits BSA Empire Star
    and M20 models with
    single spring clutch
    up to 1947
    NZ$ 38.90
    NZ$ 35.05
  • 15-5664 Nut
    GEARBOX ADJUSTER NUT
    Pre-Unit BSA
    A B & M models
    NZ$ 14.50
    NZ$ 13.05

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