Help on frame ID

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Frame, yokes, rear fender, gauges suggest 1969-1970 machine. Motor, tranny, controls and frame plate are for a later machine. Does your frame also have the mounting tab for the tire pump on the rear loop? My first guess (and its just speculation based on the few bits of info we have) is that it is not the original frame for that motor and transmission, and you have an earlier frame that someone has swapped.
 
I have a '71 also, it has the box type oil tank, front drum brakes, no turn signals, fiber glass fuel tank. I think you have what we call a bit bike, bits and pieces from other bikes. The part from Japan is a dead give away. What does the "20M3S" mean before the 14xxxx? I have this with 140707.
 
Nortasaki said:
What does the "20M3S" mean before the 14xxxx? I have this with 140707.
Click to expand...

"20" is the model code for the 750 Atlas, and "M3" is Mark 3, thus 20M3 = Atlas Mk3.

Commando models which had the camshaft driven points were prefixed 20M3S.

The prefix was no longer used after 1971.
 
Just for clarity, an 'Atlas Mk3' was the early Commando.
And called a Commando....
 
On the rear of the of the frame loop there is a spike like piece of steel, but the problem is what is it ?. The rivets that hold the tag on are quite unusual, should i be looking for a special type ?. The feed back I have had has been most welcome and a big thanks to everyone who has posted and please keep it up and if there is any photos needed to ID the bits and or bike just say. What I Want at the end is a nice original bike that is reliable and capable, I have a engine man who is very proficient with Triumph engine and gearbox rebuilds but I wish to do the rest and hope to have the bike ready by our next summer (must make a plan,dont tell wife) Thanks Jeff.
 
kiwi46 said:
On the rear of the of the frame loop there is a spike like piece of steel, but the problem is what is it ?.
Click to expand...

Never owned a bicycle? That's the retainer for the tyre pump (early frames only).
http://www.nortonproject.org/1969Commando7.jpg


kiwi46 said:
The rivets that hold the tag on are quite unusual, should i be looking for a special type ?
Click to expand...

They are "hammer drive" screws/rivets, part 061287 (x4) available from your Andover Norton parts supplier (as well as a new certification plate if required?).

http://www.nortonmotors.de/ANIL/Norton% ... &Plate=010 Item [3]
 
Most parts are available British Spares in Motuaka or jcmiller@xtra.co.nz carry a good range, the oil tank you have is 71 or later where most other chasis parts are 69-70, it may pay to find the earlyer one-
Help on frame ID

I have rebuilt a 70S so know the differences quite well.
Help on frame ID

I suggest you look at www.nocnz.org.nz which is NZ Norton Owners Club web site.
Al
 
If he's got the 71 oil tank, he may have the 71 battery tray too. I don't think the 71 oil tank will go in with the 69/70 battery tray. If your battery sits in the bike front to back, you have the 71 tray. Here's the earlier 69/70 oil tank and battery tray. Only diff is where the breather hose spigot is. Notice the battery sits side to side in the 69/70 models.

Help on frame ID


Here's both 69/70 rear mudguards.

Help on frame ID


I'm sure one could take the battery tray/oil tank/air filter parts for a 69/70 and swap them out with the parts for a 71, the frame isn't any different except where/how the prop stand mounts and the centre stand mounts.

Dave
69S
 
Are you saying the blue fender is from a '69. Here is a pic of my '70 alongside a '74 (I think) later fender:

Help on frame ID


I've got the later battery tray, backing plate, oil tank, and fender. Just need a few little bits if I decide to switch over to the later style. Never had an issue with the central tank, although many seem to think the later ones run cooler.

Al, Love the Fireflake Purple! Its pictures like that one that seriously make me rethink me Converting mine to an Interstate tank.

RSR
 
Here's what I know about rear mudguards, which is not much. The blue one is from my APR 69 'S', the one on the right is one I purchased as a 69/70 rear guard, and as I have gleaned is a later version of the 69/70 guard and the mounting is down by the horn, not like the blue one which mounts between the shock tops and off the horn mounting plate from the battery tray, the left one is one I bought from Old Britts purportedly as a chrome 71 style which I bought as a temporary replacement until I decided what to do, and I had to drill 2 holes in it to make it work on my 69. It fits fine, but doesn't have the C section, rather it has a flat area or D section which is kind of hard to see in the pic plus it has the dent in it for the oil lines towards the front. The two 69/70's have the indent for the tyre pump. Probably more information than anyone wants to know.

Help on frame ID


Dave
69S
edited to show mudguards all from the front.
 
That brake master cylinder is a Tokico part, typical Kaw/Yam/Suz/Hon bit, depending on the model/year. Thier newer 4 & 6-pot stuff is pretty nice with tiny master cylinders and full floating rotors, but purists will DEFINITELY frown!
 
DogT said:
Here's what I know about rear mudguards, which is not much.
Dave
69S
edited to show mudguards all from the front.
Click to expand...

Thanks for the info. It's always good to learn more about these machines. My bike is a May 1970 build, and the mudguard on the right in my pic (matches yours) is from it. The two upper holes mount to a secondary curved plate that attaches to the frame gusset near where the rear loop starts. Not sure if this is present on later machines: You can see it just below and behind the gusset in this not so good pic:

[EDIT: May 1970 dispatch according to NOC records, frame plate stamped D/69]

Help on frame ID
 
rightstickshift,

If you have or can get some pics of the later 69/70 rear guard mounting, I would appreciate it. My early rear guard is in bad shape, the blue one and it has a lot of bondo on it, the other one is in fairly good shape and if I could put it on my bike with the later mounting, it would be easier to get the later rear guard chromed. I'm not sure what parts I need to get the later guard on, mine mounts between the shock tops. Then I need to get the parts to mount it, which from what I've seen is a plate that attaches to the frame down by the horn, below the battery tray?

I have a friend not too far away, I need to go and see what his mounting is like, it's after mine.

Dave
69S
 
Hi Matt Spencer so if the forks are Roadhoders how are they identified and are they salable ?. I want to run a TLS front brake so do I change out the lower legs on the forks and fit new ones to suit or is it better to start fresh. have been thinking about the frame not being the right type so maybe the bike had a accident at some stage and changed out the frame and front end , so someone made a good attempt with the ID plate and rivets ,well done, or can the bike be CORRECT other than the front end ? did Norton on the off chance do this type of thing ?.( The idea of a twin disc is nice through 8) ). When i brought the bike it was to be matching numbers and a Norvil front disc arrangement , the bike was complete and all assembled but was told it was a project and the bike had been in that form for a long time.
 
Theyre DEFINATELY ' Roadholders ' ( NORTON , the worlds Best Roadholder :D 8) ) Hence , factory designation ' Roadholder'
Suspension . The ones with steel covers have wee ' ROADHOLDER ' brass badges . I think I epoxied on mine , along with the
' Norton ' engraved gear box inspection cover , the 2 in round one , two screws & breather 1 mm hole .

DO NOT discard the forks ,

He has done a coustom bearing spacer tube in the front hub , Id think , to take the Norton Axle . Theres ' a wee few '
variations in lower ( alloy ) legs . Youve got some ' Twin disc ' ones there . IF youre throwing them out , throw them at ME.

Serially , :? ' One ' needs to acertain the use to which the machne is to be put . A drum will only slow you down a bit over
80 mph , One Stop from 120 and its a bit frazzled . Heated use in mountain passes could result in flying lessons overshooting
a bend over the revine , 20 + stone + baggage .

That Cowboy's ( :p :lol: ) Purple people eater , is to me the Ideal Steve McQueen Hoon Mobile ( NZ definition of Hoon, Not Aus .( Aww , That was a Hoon ( of a ride )) . So , Youve got the Coveted Early Triple Clamps , Ordinarilly fitted with rubber
boots , to keep the grit anhileateing the seals / bushes / staunchions .


The front wheel is NO ISSUE for the moment , BAR being robbed of Four Spokes ( Dang Japs ) ( countem , 36 ?? )

Early sidecovers are those hard edged things fit inside the rear seat brace area ( like Purple )

A flash Italian master cylinder would be an upgrade . Drum only superior if ALL youre rideings on Gravel .

Early spec is 3.00 19 Front ( Bar SS which is 20 ) IF youre finding a rear rim , Id find a WM3 18 , ( Yokohama 4.70 Knobbly )

A keen Kiwi could knock up a set of side covers from Fibreglass , between Beers .

Fairly difficult to scrape the two pipes up there . The SS has one Ea Side .

Late iso rubbers , dust covers , ( probly allready fitted ) Carbs if Junk , IGNORE . FIT NEW .( Scoured bodies / slides Loose )

I prefer Points , BSA A 65 30 deg 6MCa . ( marked " 15 " , norton marked " 12 " )
And if you ever want to see another BEER , If the COILS are marked ' 6 V ' , Throw them in the Tide .Worlds worst coils .
Possible to develop severe coplexes running 6 volt coils ( marked on base )

Pretty Basic . No Big Hammers , No Tantrums ! 8) :idea:
 
Yeh its real Bert Munro territory down here, its a great week down in New Zealand's Mainland, true Southern Man Territory not for the faint hearted or north islanders. Yeh it wasn't that long ago when the dust blew down the main street and a persons mother and father where brother and sister or so the rumor has it :lol: but seriously the towns only mildly backward but thats Auckland, we in the City of Invervagus are a highly intelligent society of friendly,fun loving,evolutionary, forward thinking bunch of good buggers, thats why i choose this forum of like minded enthusiasts to help myself through this fun time of restoring a true English classic on the other side of the world or just a good yarn no matter where your from. :lol:
 
Third Line , sounds like ' the Media ' . :D , used to be viewed , early seventies , that the world ' was going downhill with
the throttle stuck & the brakes didnt work ' , but was unaffected down in those parts . Everyones ' Affected ' in the E.C.B.
these days , the smart ones were planning to get out then , to avoid the steamroller A.R.C. and Amalgamations .We had
a election sign , with " Say NO to Fat Cats & Beaurocrats " up the hill come election time .Hows young Tim the Mayor ,
his concreteing days are past , or has it evolved to another level . Cold snap at the moment according to the weather fivecast , and in Mid Summer too . Must be a Conspiracey , there all complaining its not snowing in the U.S. Theyll think
you lot have made off with it . :lol:

Check your P.M.s ?
 
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