Parts Questions

dennisgb · Mar 16, 2014

I bought a small lot of NOS Norton parts and have a couple of questions.

Are there different length swing arm bushings between Commando years? Which is which?

I found this part and have no idea what it is. Maybe a vent on the oil tank?

Any help appreciated.

olChris · Mar 16, 2014

dennisgb said:
I bought a small lot of NOS Norton parts and have a couple
I found this part and have no idea what it is. Maybe a vent on the oil tank?

Any help appreciated.

2nd photo maybe be an "adaptor" plate for the timing chest breather.... Ive only seen a few pics here and it looks the right size...

pete.v · Mar 16, 2014

olChris said:
dennisgb said:

I bought a small lot of NOS Norton parts and have a couple
I found this part and have no idea what it is. Maybe a vent on the oil tank?

Any help appreciated.

Click to expand...

2nd photo maybe be an "adaptor" plate for the timing chest breather.... Ive only seen a few pics here and it looks the right size...

More like a gearbox vent.

dennisgb · Mar 16, 2014

pete.v said:
More like a gearbox vent.

Yes that looks right. Sorry I should have put a measurement up...it's only 2" in diameter.

Must be a racing part. There were a few racing parts in the lot. Amal Velocity stacks and extenders (straight tubes that screw onto the carbs but longer than the stock ones).

Mostly fasteners, bolts, rubber parts, cables, bearings and seals. Most had part numbers and descriptions so pretty easy to figure out.

Thanks.

rvich · Mar 16, 2014

Looking at different years on the Old Britts web site, the same bush is listed up through 1974 (pre-Mk2a), 06-0447 at 1.5 inches long. For 1975 it shows bush 06-5320 for the Mk2a and the Mk3 at 1.25 inches.

PeterJoe · Mar 16, 2014

Well, the Old Britts website isn't quite correct. The short swingarm bushing was first used on the 1974 Norton Mark II and IIA's I believe around engine number 314xxx. They are the 'lube for life' bushings and those swingarms are easily identified by having a welsh plug on the end of the swingarm pivot with no grease fitting. This is one of the number of continual changes that happened to the Mark II and IIA's that is not listed in the parts book supplement. I am not aware of any revision sheets for the Mark II/IIA parts book supplement.

dennisgb · Mar 16, 2014

rvich said:
Looking at different years on the Old Britts web site, the same bush is listed up through 1974 (pre-Mk2a), 06-0447 at 1.5 inches long. For 1975 it shows bush 06-5320 for the Mk2a and the Mk3 at 1.25 inches.

Those are the ones...thanks!

dennisgb · Mar 16, 2014

PeterJoe said:
Well, the Old Britts website isn't quite correct. The short swingarm bushing was first used on the 1974 Norton Mark II and IIA's I believe around engine number 314xxx. They are the 'lube for life' bushings and those swingarms are easily identified by having a welsh plug on the end of the swingarm pivot with no grease fitting. This is one of the number of continual changes that happened to the Mark II and IIA's that is not listed in the parts book supplement. I am not aware of any revision sheets for the Mark II/IIA parts book supplement.

Thanks!

Hobot · Mar 16, 2014

The plate with the fitting would not find that much flat area to put on AMC shell but sure looks like made to order for the flat blanking plate timing chest crank case vent.

Parts Questions

Similar threads