Gearbox STD 2

[Billybream]

On another forum somebody advised Super Rocket gearbox has different ratios to standard A10 and should be marked STD 2, I thought STD 2 denoted scrambler option.
Can anybody please clarify

[JulianS]

From BSA

[JulianS]

And this.

[Billybream]

Thanks Julian for your prompt and informative reply, looks like later 1962 models of Super Rocket had the STD 2, certainly mine is a 1960 and 99% sure gearbox is orginal and marked STD

[trevinoz]

I think that you will find that the STD2/STB2 box was fitted to the Big Valve Super Rocket which was mostly exported to America.

[JulianS]

I think the modified gear ratios came on the 1962 season Super Rocket models. Below is what the factory sent UK dealers about improvements for the 1962 season in August 1961.

[JulianS]

A this is what the US market got, from the 1963 US East Coast catalogue.

[Bsareg]

Whilst on gearbox markings, has anybody else come across a CA T2 marked gearbox. Looked original stamping and was fitted to our Dbd34. I can't find any info other than might be for Catalina bike.

[sean]

This is on my 62 export model

[Lindsay S]

Those letters are never in a straight line and you sort of feel that they must have been stamping them as they went by on a conveyor belt! Another thing I have noticed is that the ’T’ looks like it has come from a different set and size of stamps than the other two! What is going on there?

[berger]

it looks very normal to me i have some the same

[JulianS]

Yes that stamping is fine.