Triumph TR6/7 Tiger T120/140 Bonneville 5-Speed Five Speed Gearbox PN# TBS-6600 57-4403


Out of stock

SKU: 633726167926 Categories: , Tag: Brands:

This is the kit we’ve all been waiting for! For a limited time and with very limited quantities we are pleased to offer these brand new, late version, Triumph 5-speed gearbox / transmission assemblies. Yes, we said brand new. We recently negotiated a great deal on these. No more trying to make worn parts function or putting up with chipped / worn teeth and dogs! For those of you with the appropriate skill set you’ll know that this assembly can be retro-fitted to both unit 650 engines and pre-unit 500 & 650 alike. Will also fit T150, T150V, A75, A75V, X75 triples but will need the 5-speed mainshaft for triples, PN# 57-4370.

Attention! These units must be installed by a knowledgeable, skilled technician!

Includes the following part numbers:

Mainshaft and gears

  • 57-4396
  • 57-4909
  • 57-7077
  • 57-4779
  • 57-4376
  • 57-4377
  • 57-4653

Layshaft and gears

  • 57-4900
  • 57-4647
  • 57-4657
  • 57-4654
  • 57-4661

Selectors and shaft

  • 57-4364
  • 57-4366
  • 57-4660
  • 57-3989
  • 57-4889

Gearchange plungers

  • 57-4403 x 2

For gearchange quadrant click here.

For right shift gear shift quadrants click here.

For left shift gear shift quadrants click here.

For gearchange index plunger springs click here.


LF Harris motorcycle spares are produced to the highest quality standards possible utilizing original Triumph tooling, dies, factory blueprints & materials combined with modern manufacturing equipment, tolerances & techniques.



There are no reviews yet.

Be the first to review “Triumph TR6/7 Tiger T120/140 Bonneville 5-Speed Five Speed Gearbox PN# TBS-6600 57-4403”

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

You may also like…

Shopping Cart
Scroll to Top

Shop By Vehicle