Skip to content
  • By Bike
    • BSA A Group
    • BSA B Group
    • BSA Bantam
    • BSA C Group
    • BSA M Group
    • BSA Spares
    • Norton Spares
    • Triumph Spares
  • Parts
    • Air Filters
    • Bolt Sets
    • Brake Cables
    • Brake Levers
    • Brake Pedals
    • Brake Shoes
    • Carbs & Accessories
    • Chain Tensioners
    • Chains
    • Choke Cables
    • Clutch Cables
    • Clutch Levers
    • Decals
    • Electrical
    • Engine & Gearbox
    • Exhausts
    • Footrests
    • Fork Seals
    • Frame
    • Fuel / Petrol Taps
    • Gaskets
    • Gear Levers
    • General Spares
    • Hand Grips
    • Handlebars
    • Ignition
    • Kickstarts
    • Lights and Accessories
    • Oil Filler Plugs
    • Rubber
    • Seals
    • Spark Plugs
    • Speedo Cables & Accessories
    • Sprockets
    • Stands
    • Steering
    • Suspension
    • Tank Badges
    • Throttles
    • Throttle Cables
    • Tyres & Tubes
    • Wheel Bearings
    • Wheel Components
  • Lubricants & Oils
  • Workshop Tools
  • Account
SJ Motorcycle Engineering
Cart
  • By Bike
    • BSA A Group
    • BSA B Group
    • BSA Bantam
    • BSA C Group
    • BSA M Group
    • BSA Spares
    • Norton Spares
    • Triumph Spares
  • Parts
    • Air Filters
    • Bolt Sets
    • Brake Cables
    • Brake Levers
    • Brake Pedals
    • Brake Shoes
    • Carbs & Accessories
    • Chain Tensioners
    • Chains
    • Choke Cables
    • Clutch Cables
    • Clutch Levers
    • Decals
    • Electrical
    • Engine & Gearbox
    • Exhausts
    • Footrests
    • Fork Seals
    • Frame
    • Fuel / Petrol Taps
    • Gaskets
    • Gear Levers
    • General Spares
    • Hand Grips
    • Handlebars
    • Ignition
    • Kickstarts
    • Lights and Accessories
    • Oil Filler Plugs
    • Rubber
    • Seals
    • Spark Plugs
    • Speedo Cables & Accessories
    • Sprockets
    • Stands
    • Steering
    • Suspension
    • Tank Badges
    • Throttles
    • Throttle Cables
    • Tyres & Tubes
    • Wheel Bearings
    • Wheel Components
  • Lubricants & Oils
  • Workshop Tools
Account
Item added to cart. View cart and check out.
Welcome to SJ Motorcycle Engineering. BSA Specialists.
Home › Vehicle Parts & Accessories:Motorcycle Parts:Drivetrain & Transmission:Gearboxes & Gearbox Parts

Vehicle Parts & Accessories:Motorcycle Parts:Drivetrain & Transmission:Gearboxes & Gearbox Parts

BSA A7 A10 B31 B32 B33 M20 CLUTCH HUB MAINSHAFT LOCK WASHER 65-3822
BSA A7 A10 B31 B32 B33 M20 CLUTCH HUB MAINSHAFT LOCK WASHER 65-3822
Regular price £2.95
View
BSA BANTAM D1 D3 D5 D7 D10 D14 GEARBOX DRAIN PLUG  90-0115
BSA BANTAM D1 D3 D5 D7 D10 D14 GEARBOX DRAIN PLUG 90-0115
Sold Out
View
BSA BANTAM D1 D3 D5 D7 D10 D14 GEARBOX SPROCKET NUT LH THREAD 90-0172
BSA BANTAM D1 D3 D5 D7 D10 D14 GEARBOX SPROCKET NUT LH THREAD 90-0172
Sold Out
View
BSA BANTAM D1 D3 LAY SHAFT BUSH 3 SPEED 90-0083
BSA BANTAM D1 D3 LAY SHAFT BUSH 3 SPEED 90-0083
Sold Out
View
BSA C15 C25 B25 B40 B44 B50 A50 A65 TR25W GEARCHANGE SHAFT REPLACEMENT
BSA C15 C25 B25 B40 B44 B50 A50 A65 TR25W GEARCHANGE SHAFT REPLACEMENT
Sold Out
View
BSA D1 D3 D5 D7 D10 THREE 3 SPEED BRONZE CLUTCH THRUST WASHER 90-0283
BSA D1 D3 D5 D7 D10 THREE 3 SPEED BRONZE CLUTCH THRUST WASHER 90-0283
Sold Out
View
BSA Triumph C15 B25 B44 A65 3TA etc Gearbox Sprocket Nut 40-3051 57-1434
BSA Triumph C15 B25 B44 A65 3TA etc Gearbox Sprocket Nut 40-3051 57-1434
Sold Out
View
BSA TRIUMPH GEARBOX CHAINCASE FILLER CAP 57-2166 70-8231
BSA TRIUMPH GEARBOX CHAINCASE FILLER CAP 57-2166 70-8231
Sold Out
View
TRIUMPH 4 SPEED PRE UNIT & 650 UNIT GEARCHANGE SELECTOR PLUNGER 57-0406
TRIUMPH 4 SPEED PRE UNIT & 650 UNIT GEARCHANGE SELECTOR PLUNGER 57-0406
Regular price £13.15
View
TRIUMPH T120 T140 TR6 TR7 BONNEVILLE TIGER GEARBOX LEVEL PLUG ASSEMBLY 57-3668
TRIUMPH T120 T140 TR6 TR7 BONNEVILLE TIGER GEARBOX LEVEL PLUG ASSEMBLY 57-3668
Sold Out
View
TRIUMPH T140 T150 T160 BONNEVILLE TRIDENT GEARBOX INDEX PLUNGER SPRING
TRIUMPH T140 T150 T160 BONNEVILLE TRIDENT GEARBOX INDEX PLUNGER SPRING
Sold Out
View

Pages

  • Search
  • About Us
  • Terms & Conditions
  • Contact Us
  • Privacy Policy

Follow us

  • Facebook
  • Instagram
© 2025, SJ Motorcycle Engineering. Made by Glaze
Payment methods
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa