Please help me identify these Commando parts

If you want to restore to a "more original appearance," that is up to you, BUT strongly suggest you keep the vernier Isolastics, the Boyer ignition and the belt drive. Also, if you plan to ride the beast (it is well worth riding!) make sure the brakes have good linings and are properly arced to the drums.
 
solbero said:
@grandpaul Thank for your informative reply and I will take you up on your Excel sheet offer. The bike is a 1970 Norton Commando which has been converted to a cafe racer by the previous owner before my dad aquired it. The bike is able to start and runs well.

Please help me identify these Commando parts


As far as I know the following modifications has been done to the bike:

* Front and rear vernier isolastics
* Primary chain case converted to belt drive
* Boyer MK3 electronic ignition
* H4 headlight and reflector
* Non-standard silencers, I think at least I have another pair which are well used
* K&N air filter
* Resleeved Amal carburettor valves
* Refurbished original tank and seat, not fitted on bike
* Clutch? Since I have a spare clutch basket with parts

Most of the parts I have been able to identify. I have used Andover Norton and the parts manual for that job. But given the nature of the bike and the modifications done to it, some of the parts are from later models and some are custom. So given that I for most of these I might not know the English name (non-native speaker), it takes a lot of time to identify them by sight. The identifications done by the members of this forum has been invaluable in pointing me in the right direction.

My plan is to restore to a more original appearance during the coming fall and winter. My plan is to I create a seperate thread then. Right now my goal is just to catalogue what I have and get an overview.
Click to expand...
You are maintaining an "A-" grade for a new guy here. You get an "A" for including photos and being reasonably thorough, but you get a "minus" because we still don't know your real first name!

hee hee (just joking)

Files sent by e-mail as requested.

The bike is a very nicely prepared cafe racer. As for your personal preference to return it to stock, that is most likely what I would do as well...
 
solbero said:
It looks like a roadster tank, but pictures tell more than thousand words.
Click to expand...

Yes, although that fibreglass tank type was also fitted to the 'S' type, 'R' type, ('SS' and Hi-Rider). The side panel in your first picture is the later type. I can't tell if it has a 1970 type Roadster (or 'S' type) central oil tank or not, and a '70 Roadster would have had a headlamp halo instead of the brackets. Black and the double pinstripes are also wrong for 1970.

 
Is the tank steel or fibreglass?
Fibreglass tanks aren't compatible with modern ethanol 'e' fuel and will slowly dissolve.
Good quality steel tanks are available from Emgo, poor/variable quality ones from India
 
B+Bogus said:
Is the tank steel or fibreglass?
Click to expand...
Almost certainly fibreglass as it has pommels at the rear for the rubber fixing band and a forward hinged filler cap plus there's no weld lip at the front (many 850 Mk3 tanks have no weld lip but it's not a Mk3 tank).
 
(2) exhaust mount bobbin plates, a footpeg mount stud, a gear shifter, and gear indicator for the shifter.

I always thought the latter was a bit funny, you must have exceptionally sharp eyes, and quick reflexes, to peer down at the indicator and see what gear your bike is in, whilst underway...
 
solbero said:
I should have added some measurements for the parts which are not distinct (bolts and such). #24 has a head of 1/2", length of 4" and the body is 5/16"
Click to expand...
Probably cradle / engine bolt: 06.3211, as LAB said in post #30.
 
Yes, and if the OP's measurement includes the head, it's a 3 3/4" bolt.
Part # 06.2663. Bottom crank case bolt.
Not sure where he took the measurement.
 
MichaelB said:
Yes, and if the OP's measurement includes the head, it's a 3 3/4" bolt.
Part # 06.2663. Bottom crank case bolt.
Not sure where he took the measurement.
Click to expand...
It is 4" from under the head.

It could be 06.0940 HEX. BOLT 5/16"UNF x 4". But what part of the motorcycle it belongs to still remains a mystery to me.
 
Hi guys, here is another puzzle. I got two of these brackets with a stash of used Mk3 parts, though I am pretty sure they are not for a Mk3. Black color indicates they were fitted to a British bike!

Spacing between the outer bolts is approx. 2-3/16", for the adjacent screws the spacing is approx. 1-3/16". Thread is 3/16" UNF. Does anyone recognize this part?

Edit: Thanks, LAB. Bracket is seen in Section 012, Electric start. Kind of hard to detect.

- Knut

20250801_160041.jpg
 
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