Factory Parts 57-0023 to 57-7083

Triumph used the letter T as the pre-fix for transmission parts until they computerised their system around 1973.

The T then became the number 57- and shorter suffixes were converted to 4 digits by adding leading zeroes.

Therefore, a part designated T23 becomes 57-0023 and a T1607 becomes a 57-1607

The parts referred to under either system are generally interchangeable

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  • 57-4289 Spring Support
    Leaf Spring Support
    4 Speed
    aka: T4289
    NZ$ 2.15
    NZ$ 1.90
  • 57-4290 Plate
    Leaf Spring
    Top Plate
    aka: T4290
    NZ$ 2.15
    NZ$ 1.90
  • 57-4291 Locktab
    Locktab Plate
    Leaf Spring
    aka: T4291
    NZ$ 1.35
    NZ$ 1.20
  • 57-4338 Spring
    Kickstart Spring
    Triumph BSA
    Unit Construction
    Singles
    aka: T4338
    NZ$ 13.10
    NZ$ 11.80
  • 57-4342 Stop
    Kickstart Stop
    B50
    NZ$ 10.20
    NZ$ 9.15
  • 57-4356 Cotter Pin
    Kickstart Cotter Pin
    aka: T4356 2-2579 02-2579
    T1222 57-1222 75-3143
    S52-1
    NZ$ 9.80
    NZ$ 8.80
  • 57-4396 Nut
    Sprocket Nut
    5 Speed models
    NZ$ 21.05
    NZ$ 18.95
  • 57-4400 Housing
    Index Plunger Housing
    aka: T4400
    NZ$ 23.60
    NZ$ 21.25
  • 57-4403 Plunger
    Gearchange Plunger
    5 Speed models
    NZ$ 28.00
    NZ$ 25.20
  • 57-4439 Lever
    Clutch Operating Lever
    aka: T4439
    NZ$ 8.05
    NZ$ 7.25
  • 57-4445 Spindle
    Gearchange Quadrant Spindle
    Rocket 3
    NZ$ 48.30
    NZ$ 43.45
  • 57-4459 Spring
    Index Plunger Spring
    aka: T4459
    NZ$ 4.75
    NZ$ 4.30
  • 57-4575 Bush
    3rd Gear Bush
    Mainshaft 5 Speed
    aka: T4575
    NZ$ 24.90
    NZ$ 22.40
  • 57-4588 Lever
    Clutch Operating Lever
    aka: T4588
    NZ$ 22.10
    NZ$ 19.90
  • 57-4589 Plate
    Clutch Thrust Plate
    aka: T4589
    NZ$ 20.75
    NZ$ 18.70
  • 57-4612 Dipstick
    Gearbox Dipstick
    TR5T Trophy Trail Adventurer
    NZ$ 25.25
    NZ$ 22.70
  • 57-4644 Spring
    Clutch Spring
    Triumph 750 Twins
    aka: T4644
    NZ$ 4.30
    NZ$ 3.90
  • 57-4656 Bush
    1st Gear Bush
    Layshaft 5 Speed
    aka: T4656
    NZ$ 21.45
    NZ$ 19.30
  • 57-4662 Bush
    2nd Gear Bush
    Layshaft 5 Speed
    aka: T4662
    NZ$ 25.30
    NZ$ 22.80
  • 57-4674 Bush
    Starter Shaft Bush
    T160
    NZ$ 8.05
    NZ$ 7.25
  • 57-4676 Screw
    SCREW
    Length UH: 7/16 inch
    Thread Form: 2BA 31.36tpi
    Head Style: Fillister Posidriv
    Finish: Plated
    NZ$ 1.60
    NZ$ 1.45
  • 57-4699 Bush
    Cross Shaft Bush
    Gearchange T160
    NZ$ 9.95
    NZ$ 8.95
  • 57-4754 Stud
    Clutch Spring Stud
    aka: T4754
    NZ$ 8.80
    NZ$ 7.90
  • 57-4793 Bush
    4th Gear Bush
    Layshaft 5 Speed
    B Range
    aka: T4793
    NZ$ 12.90
    NZ$ 11.60
  • 57-4794 Washer
    Clutch Nut Washer
    aka: T4794
    NZ$ 10.55
    NZ$ 9.50
  • 57-4861 Spring Plate
    Kickstart Spring Plate
    T160
    NZ$ 14.25
    NZ$ 12.80
  • 57-4876 Bush
    Breather Bush
    Clutch Housing
    T160
    NZ$ 5.35
    NZ$ 4.80
  • 57-4881 Quadrant
    Gearchange Quadrant Knuckle
    T160
    NZ$ 57.45
    NZ$ 51.70
  • 57-4909 Lockwasher
    Sprocket Locktab Washer
    5 Speed models
    aka: T4909
    NZ$ 7.80
    NZ$ 7.05
  • 57-4916 Locktab
    Locktab Plate
    Clutch Mechanism
    T160
    NZ$ 2.15
    NZ$ 1.90
  • 57-4927 Bush
    Support Bush
    Gearchange Cross Shaft
    T160
    NZ$ 10.75
    NZ$ 9.65
  • 57-4929 Lock Plate
    Locktab Plate
    Gearchange Cross Shaft
    T160
    NZ$ 2.70
    NZ$ 2.45
  • 57-4978 Bush
    Gearchange Spindle Bush
    T160
    NZ$ 50.75
    NZ$ 45.70
  • 57-4979 Dust Cover
    Gear Change Lever
    Dust Cover
    T160
    NZ$ 8.05
    NZ$ 7.25
  • 57-5000 Bush
    Gearshift Fork Bush
    T160
    NZ$ 27.00
    NZ$ 24.30
  • 57-5086 Adaptor
    Neutral Switch Adaptor
    T160
    NZ$ 16.10
    NZ$ 14.50
  • 57-5089 Link
    Gearchange Shaft Link
    T160
    NZ$ 7.45
    NZ$ 6.70
  • 57-5352 Spacer
    SPACER
    But what's it for...?
    NZ$ 2.70
    NZ$ 2.45
  • 57-7008 Bush
    Gearchange Bush
    Outer Cover
    Left Shift
    Triumph Twins
    NZ$ 11.25
    NZ$ 10.15
  • 57-7009 Bush
    Inner Gearchange Bush
    Left Shift
    Triumph Twins
    NZ$ 10.75
    NZ$ 9.65
  • 57-7011 Spindle
    Quadrant Spindle
    Triumph Twin
    Left Shift
    NZ$ 13.55
    NZ$ 12.20
  • 57-7015 Plug
    Cover Plug
    Inner Gearbox
    NZ$ 2.15
    NZ$ 1.90
  • 57-7016 Retainer
    Plug Retainer
    Inner Gearbox Cover
    NZ$ 0.80
    NZ$ 0.70
  • 57-7020 Plunger
    Gearchange Index Plunger
    NZ$ 23.50
    NZ$ 21.15
  • 57-7041 Pin
    Neutral Switch Pin
    NZ$ 2.70
    NZ$ 2.45
  • 57-7046 Spacer
    Neutral Switch Spacer
    NZ$ 1.05
    NZ$ 0.95
  • 57-7051 Spring
    Gearchange Spring
    NZ$ 4.85
    NZ$ 4.35
  • 57-7055 Bush
    Gearchange Bush
    Primary Cover
    Left Shift
    Triumph Twin
    NZ$ 9.65
    NZ$ 8.70
  • 57-7076 Locktab
    Mainshaft Locktab Washer
    Late 5 Speed models
    NZ$ 3.45
    NZ$ 3.10

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