interstateOz wrote:ive been scouring the internet for photos of 1970 roadsters and half have the fork ear style and half have the other halo style i wish there were a way to find out what came out genuine original?

Norton model year starts in August so a 1970 registered bike may already belong to the 1971 specification. Check your VIN, mine is 1370xy (don't remember exactly) and according to Joe Seifert of Norton Motors it was shipped in May 1970.

If the upper yoke of your bike has threaded inserts on the underside then most likely it was equipped with a halo. The 1971 model has completely different yokes.



Tim

interstateOz wrote:I just got an email back from RGM and they told me the only bike with the halo setup was the S type not the roadster????????????

That's easily falsified by looking at the 1970 sales brochure http://www.classicbike.biz/Norton/Broch ... Norton.pdf That is a roadster and it has the low pipes.

You should definitely check your VIN and maybe even get it dated by the NOC. The records aren't 100% perfect but the three bikes I bought recently all were in and I have a shipping date on all of them.

Once you know what you have you should get the corresponding parts list. Unfortunately there are no drawings in the 1969-70 supplement so if you really have a 1970 Roadster you'll still need a bit of detectives work but thanks to Dave's excellent documentation of his 1969 750S most special bits can be identified here.

The 1971 model year was very different so have a look at the oil tank as well: The 750S and the early roadster have a completely different oil tank which is a square box with rounded edges and a corresponding different oil tank and battery carrier which mounts the battery laterally rather than longitudinally, Dave took pictures so you can find them in one of the two threads already posted here.


Tim

Its definately 69-70 although i should confirm via frame numbers, the centre stand is located on the frame not the rear swing arm and the 2 steering stop lugs are in the position of the old frame, later models just have the centre one lug.

Thanks for showing the link to the brochure as it does show a roadster with the halo on there! I will get numbers to confirm.

I will have to take some pics and post i think will be easier so u guys can see.

Thanks heaps
Adam

That is my original halo and brackets. It measures 8 1/4" center to center diameter. Here's a picture of that special nut and the plastic bumper on the bottom mount. The nut has grooves in it to catch a rim on the inside of the bumper. As you can see, my bumper has seen better days. You will never find those parts, but you could make something up.



Probably sometime in the late 70's they started producing the 'eared' headlamp mounts and changed the fork mounting, so an 70 Roadster could probably be either headlamp type. I have an old list I found somewhere years ago (home.cfl.com/limeland/norton.html but it does not exist any more) and it lists the last 'S' as June 1970 #135088. Mine is 132031 and the GB, Frame and engine all match.

You might want to look at the left side 1/2" iso nut at the top of the Z plate. Usually that nut will be worn on one side from the 'S' exhausts banging on it and wearing a flat on it, at least I have seen it on a couple of bikes, that would never happen to a Roadster.

Dave
69S

check out the oil tank in this link 1970-roadster-references-and-detail-pictures-t5389.html?hilit=halo if you have this type of oil tank then you should have a halo, R types had the panier oil tank and headlight ears like a 68-69 fastback IMGhttp://i753.photobucket.com/albums/x ... ndo003.jpg[/IMG] the later style ears were not intraduced untill the 71 model year when there were significant changes made, oil tank centre stand side stand etc.
Al

Al,
I am always confused about the 'R' model. It is listed with the 'Commando spares List', but is very sketchy. I am not sure what model the spares book with supplements for 69 and 70 is basically about because they have the 69 'R' , 69 'S' and 69 Fastback and the last page lists the ''70 Roadster Only' in the last pages as addendum. There must not have been many 'R' models made? Is the basic 'Commando Spares List' about the 67-68 Commando which looks like a fastback to me?

Confusion reigns again.

Dave
69S

You're correct...there were very few R Types built. Good guess is around 300.

The early 20M3 Commando was not known as "Fastback" until 1970 I think. The "S Type" and the "70 Roadster" are the same except for the exhaust. I believe the 70 Roadster was available with more colour choices.

For an "R Type" use the '69 spares list and supplement the 20M3 "Fastback" with the "R Type" pages. It's basically a 20M3 with "S Type" fueltank, seat, tailpiece and fenders.

If'n yer agoin' to Lumby you'll prolly see this one there...



Tony

R Model Tony wrote:For an "R Type" use the '69 spares list and supplement the 20M3 "Fastback" with the "R Type" pages. It's basically a 20M3 with "S Type" fueltank, seat, tailpiece and fenders.

Take a look at this contemporary pic from the Andover site: http://www.andover-norton.co.uk/NCRModel.htm which proves that Tony's pic shows a pretty correct bike.

The "R" also has the early exhaust and the early "featherbed fork ears". That might actually explain the original "fork ear" question but then the bike in question is not a Roadster.


Tim

I beleive the R only had like the 68-early 69 Fastback the rev counter driven from the end of the cam and points where the magneto would have been. I came across one some years ago and it slip through my fingers.
Al

possm wrote:I beleive the R only had like the 68-early 69 Fastback the rev counter driven from the end of the cam and points where the magneto would have been.

That's what Tony referred to as 20M3. The points-on-cam-cover-Commandos are 20M3S.


Tim

Just wanted to say thanks to everyone for all the input and help, thanks heaps!

hi all, i just thought id let everyone know that i managed to source all the parts for the headlight halo and assembly from Fair Spares America just in case anyone else is also looking for the same parts, thanks.