Britbike forum Forums British Motorcycle specific Brands Ajs & Matchless forum gearbox cover seals

Can anyone tell me if the kickstart shaft seal and the shift shaft seal on my 1962 Matchless G12 are the same as a Norton Commando? The kickstart seal leaks badly and needs to be replaced. I would like to have both seals on hand before I tear into it.

Do you have the part numbers in your parts book ?
That would say for sure.

AMC boxes changed about that year, and in that area, so its possible you
have the earlier version. ? Not being entirely familiar with what that involved,
I'd be reluctant to even put my 02 cents worth in.

And by the time of the Commando, about everything was just that little bit changed/different ?
Whether that would prevent them being fitted I know not ...

I had a lot of trouble keeping oil in the gearbox as it was leaking out of the kickstart spindle. This is a 1961 G80CS. Long story short, I had the cases machined to take a lip seal for both gear and kickstart spindles. No more leaks. If your seal is just an "O" ring as mine was, spend the time to get the lip seals fitted.

Part numbers for the Matchless and Norton are the same in the documentation I have found. 04-0006 is an o-ring for the shift shaft. 04-0005 is the kickstart seal. It is called an o-ring, but the one I am looking at on ebay is definitely does not have an "O" cross section. That's where I am going. If it leaks after replacement, so be it!