Gearbox outer cover numbers

Hello, I have 1967 N15CS gearbox number NA15221. I believe it has the correct inner cover with the kickstart spring looped round a steel boss but an incorrect outer, cast part number 06 0722.
I am trying to find the correct outer part number.
The parts book says 028535 but can find no reference th this number
What is the part number of the cover I need ?
And is the part number cast into the cover ?
Thanks Richard

This link


xref 02-8535 to 04-0133

Which leads nowhere but at least it gives a useage list

Fits: AMC-type gearbox 1957-1969
Types: Norton 88-99-50-ES2 650SS – Atlas – G15
/ AJS & Matchless 16M-G3L 18-G80+C+CS G9-11-12 33CRS-G15

Maybe one to ask Andover Norton about, even if they only tell you the differences.

kommando said:

This link

Gearbox outer cover, Partno. 04-0133 (02-8535)

Discover the Gearbox outer cover, Partno. 04-0133 (02-8535) by AJS - Matchless|Norton – ideal for restoring your vintage AJS - Matchless|Norton motorcyc...

www.obsoletebikeparts.com

xref 02-8535 to 04-0133

Which leads nowhere but at least it gives a useage list

Fits: AMC-type gearbox 1957-1969
Types: Norton 88-99-50-ES2 650SS – Atlas – G15
/ AJS & Matchless 16M-G3L 18-G80+C+CS G9-11-12 33CRS-G15

Maybe one to ask Andover Norton about, even if they only tell you the differences.

Click to expand...

Hello, thanks for detailed response.
Most common one for sale is 04-0406
Do you know which model this is for ?
Thanks Richard

No idea, you need to speak to AN, they have all the drawings. Maybe just ask them why they only have the Commando version listed on their site.

tribonnie said:

Most common one for sale is 04-0406
Do you know which model this is for ?

Click to expand...

The casting number is NOT equal to the finished item's part number. A cover which exhibits casting number 040406 is likely the correct cover (I have no cover on hand to verify). I don't know of an alternative design made by AMC. You will notice that in the parts book, it was listed as fitted to all heavyweight models (AJS/M + N).

See eBay 186422378247 for instance.

Please note outer covers were susceptible to warpage, so examine samples of interest carefully.

- Knut

Thanks everyone, now I know what I am looking for

I have read about the NXXXX being early 57--62. NAxxxx upto about 1968 and the commando having the engine number. I am looking at a gearbox with an offset N then 15350. this doesn't seem to be an engine number unless somebody tells me otherwise, what's with the 5 numbers please. thanks N

nimrod said:

I have read about the NXXXX being early 57--62. NAxxxx upto about 1968 and the commando having the engine number.

Click to expand...

Correct

nimrod said:

I am looking at a gearbox with an offset N then 15350. this doesn't seem to be an engine number unless somebody tells me otherwise, what's with the 5 numbers please. thanks N

Click to expand...

You have a gearbox shell with serial number N (offset) 15350 ? The serial numbers are for transmissions only, no relationship whatsoever to engine or frame numbers.
That particular shell appears to be for a Norton Dominator or single made up to 1962. It will not fit your G15CS because shells used in Matchless bikes had a forward pointing lower lug, designed so that powerplants were more compact than the rather huge (long) powerplants fitted to the Featherbed frames. However, AMC created a great deal of confusion later on by designating shells for Featherbed frames and shells for AMC frames the same serial number scheme, NA xxxxx .
So, if you are looking for a gearbox shell for your bike, look for one with MA xxxxx stamping and a scallop for the position adjuster at the upper lug.

I don't know the difference between 02-8535 and 04-0142. 028xxx corresponds to a revision for 1962.
Cover for the backward numbered gear indicator used at the G15CSR carries #040630.

EDIT: See discussion here:

EDIT 2: Please note that 04-0142 is the correct part number for the outer cover up to 1962/63, while 04-0133 is the part number for the _inner_ case up to 1962/63. The merchant cited above screwed up. Casting number 040406 is correct.

- Knut

Norton pre-Commando outer covers have the entry hole for the clutch cable further back and threaded for the clutch cable adjuster, We don't manufacture those but probably a good idea for the future.

040142 / 028535 Outer cover modified to take oil seal 06.6145 .

- Knut

Is that modification even still relevevant today? Seeing that internal X-seals have been available for a while now (to fit standard, unmodded covers).

elefantrider said:

Seeing that internal X-seals have been available for a while now (to fit standard, unmodded covers).

Click to expand...

I don't know of any X-ring seal which fits in an unmodded outer cover. The radiused groove is made for an O-ring while an X-ring requires a rectangular groove. Someone is probably offering the machining required for the conversion. Do you have a part number for a suitable X-ring?

Edit: I discovered RGM is offering the X-ring under the same part number as the O-ring. Is the grove for the O-ring actually rectangular? If so, that's good news. Anyone fitted one of these?



- Knut