Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox up to 1954 / 1955

Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox up to 1954 / 1955


Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox up to 1954 / 1955

For 500cc / 650cc Pre 1955 rigid frames Triumph T120 Bonneville, T110, T100, 5t Speed Twin,  etc.

With TACHO drive. 

Condition of this Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox.

It turns smoothly and it’s very clean inside.

The main case has SM T910 as the cast number. This case also has the tacho drive fitted. These pieces on info suggest that this is a later version of the gearbox. The gearbox number is stamped and the number is shown in the images.

This is a very clean 1950’s Triumph motorcycle gearbox for the rigid frame models. If you are looking for a suitable gearbox for a swinging arm pre unit Triumph motorcycle, please see my other Triumph parts, or ask.

Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox with tacho drive

  • The frame mounts are in good condition
  • The clutch adjustment fixing is good
  • The cap on the outer cover is non-standard. It is fitted just to keep the dust out. You will need the correct cap to sit tightly
  • The outer cover has a variety of fixings.
  • The gear shaft has good splines
  • It has no gear indicator
  • There are no nasty cracks or issues. However, there has been a repair to the inner cover close to the tacho drive. I have shown this in the images.
  • Good keyway and drive shaft threads.

If you are looking for a Pre Unit Triumph Rigid Frame motorcycle 4-speed gearbox, this is a good choice. It’s clean and ready for use. Although I would advise that you check it over yourself.

I have a few standard Triumph Pre-unit swing arm gearboxes but this is the only close ratio one that I have. The others are a combination of swinging arm / rigid frame gearboxes. Please see the selection of Triumph gearboxes here within the rest of the pre-unit parts..

Buyer notes

Shipping is charged ON TOP of the price for the itemThere are too many variables to include shipping in the checkout, so please contact me before you buy and I will give you a shipping price.

I usually ship to most destinations.

International shipping available. Let me know where you are and I will send you a price for shipping with tracking

Combined shipping available. 

Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.

Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.

Payment: Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well. I can accept EUROS. Please ask. 

Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.

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