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Motorcycle Discussions => British Bikes => Topic started by: A65rider on November 13, 2016, 09:32:22 AM

Title: Help identifying a Triumph gearbox
Post by: A65rider on November 13, 2016, 09:32:22 AM
I've recently acquired a Triton that is based on a 1960 T110 engine and 1961 slimline frame. The gearbox, which I've been told is Triumph, doesn't match the drawings in the 1961 manuals. Can anyone tell what type / year it is (see photo).
Title: Re: Help identifying a Triumph gearbox
Post by: L.A.B. on November 13, 2016, 10:11:37 AM
I've recently acquired a Triton that is based on a 1960 T110 engine and 1961 slimline frame. The gearbox, which I've been told is Triumph, doesn't match the drawings in the 1961 manuals. Can anyone tell what type / year it is (see photo).

It's a pre-'58 type gearbox.

Title: Re: Help identifying a Triumph gearbox
Post by: mini-me on November 13, 2016, 10:55:02 AM
its a  mix up of many parts and years.

You will be very familiar with lots of manuals soon :o
Title: Re: Help identifying a Triumph gearbox
Post by: A65rider on November 13, 2016, 11:23:02 AM
Gents - thanks for comments. I've found the gearbox in the 1955 parts manual. Is there any way to tell exactly which one it is. The number stamped on top f the gearbox is 70912. Rgds
Title: Re: Help identifying a Triumph gearbox
Post by: L.A.B. on November 13, 2016, 06:39:48 PM
As I understand it, the original engine and gearbox numbers didn't match, and although the VMCC or TOMCC may be able to tell you what year/model the gearbox is from, after around 60 years the gear ratios may not be the same as when it left the factory.     
Title: Re: Help identifying a Triumph gearbox
Post by: mini-me on November 13, 2016, 08:58:21 PM
I wouldn't worry over much about it, Triumph gearboxes of that era are much of a muchness.

Have you a problem with it?
Title: Re: Help identifying a Triumph gearbox
Post by: A65rider on November 13, 2016, 10:33:51 PM
Not really, at present the gear lever is reversed for the rear set foot pedal. This gives 1 up and 3 down. I prefer 1 down and 3 up as per my BSA A65. Someone mentioned that the gearbox may have a reversible quadrant or whatever so that is why I wanted to pin down the exact model aswell for any spares I might need to get in the future. Rgds
Title: Re: Help identifying a Triumph gearbox
Post by: mini-me on November 13, 2016, 10:45:39 PM
all bearings and bushes are easily availiable, the actual gears should not give much bother. The guts are interchangable over many years, given a bit of common sense, selectors wear the worst, but pretty long lived.
I have a feeling a reversable camplate may once have been an option. How rare, or if they exist I don't know.

Personally down for up  I found made for quicker gearchanges.

Have you consider a different rearset arrangement that would put the change as you want? rather than the simply reversed lever?

The long kick start looks to be off a later unit 650, but that cotter should be the other way round, and its too long, worth checking, if its a soft crap one it'll give trouble.
Title: Re: Help identifying a Triumph gearbox
Post by: L.A.B. on November 13, 2016, 11:44:23 PM
The long kick start looks to be off a later unit 650, but that cotter should be the other way round

Not in a unit kickstart lever.