BSA M21 Transmission in 45 Solo Frame
BSA M21 Transmission in 45 Solo Frame

Photos: courtesy of enigmas


How to do this? Click here for my booklet: British Transmission Ideas for the Harley-Davidson 45.

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Matchless and AJS Restoration
BSA Gold Star and Other Singles
BSA Singles Restoration
BSA Twin Restoration
BSA A7 & A10 Twins 1947-1962 Repair Manual
Haynes BSA A50 & A65 Twins 1962-73
BSA Unit Singles Owners Workshop Manual 247-499cc 1958-72
BSA Pre-unit Singles Owners Workshop Manual 350-600cc 1954-61
Norton Commando Owners Workshop Manual: 750, 850
Norton 500, 600, 650 & 750 Twins Haynes Owners Workshop Manual
Triumph Pre-Unit Twins 1947-62 Repair Manual
Triumph 650 & 750 Twin Owners Workshop Manual 1963-83
Triumph 350 and 500 Twins Owners Workshop Manual: 349-490cc 1958-73
Triumph Owners Workshop Manual: Trident & BSA Rocket 3 1969-75
Norton Twin Restoration
Triumph Singles: Early Days to 1974
Triumph Twin Restoration
Mikuni Tuning for British Twins
British Transmission Ideas for the H-D 45

"Harley-Davidson" name for reference purposes only. Not affiliated with Harley-Davidson Motor Co.

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45, WL, 4-speed, four speed, british, english, Harley, Harley-Davidson, H-D, flathead, sidevalve, side-valve, flat-head, flathead, flat head, gearbox, transmission, BSA, M20, M21, brit, foot shift, footshift, foot-shift, convert, conversion, trans, tranny, Victory, panic, Diamond