just finishing

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Hi all

Just finishing off my mk2A and have a couple of questions.

1. any idea where this bracket goes? ah, cant upload photos. bracket is about 70mm long x 20mm wide shaped as 'S' and has a 10mm hole one end and 12mm the other. breather tube support?
2. does the mk2a have an oil separator, as the mk3?
3. what is the routing of the breather system?

thanks

Stephen
 
stephen said:
ah, cant upload photos.

But you probably can upload them to Photobucket (Photobucket.com) and then insert the photo's individual IMG code into your message.

technical-information-how-post-photos-t2357.html

stephen said:
bracket is about 70mm long x 20mm wide shaped as 'S' and has a 10mm hole one end and 12mm the other. breather tube support?

Sounds like it could be the rear brake light wire support bracket (attached to the lower footrest mounting)?
just finishing


stephen said:
2. does the mk2a have an oil separator, as the mk3?

According to the 2/2A parts supplement it does, however the 2A separator arrangement doesn't seem to have been exactly the same as the Mk3.
 
great thanks, yep thats the bracket. cheers
just the breather system to sort out now
Stephen
 
NORBECER said:
Hi, Click on the link and you will find a diagram with the routing of the oil and breather lines.

The breather/separator lines shown in the diagram are for the 850 Mk3, however, the Mk2A appears to have had a different oil separator arrangement (if fitted?) and the separator part numbers for Mk2A and Mk3 are also different.
From what we know so far, it would seem at least some 2A models had their oil tank breather hose connected directly to the (black plastic) airbox and at a different location to the Mk3 separator connection.

2A
B+Bogus said:

Mk3
just finishing


Perhaps one of our forum members will be able to post a photo of a 2A with the separator in position?
 
Unfortunately on my Mark IIA the oil separator was long gone before I even bought my bike. My breather was hooked up like the previous photos depict. Looking at the Mark IA Parts supplement there was apparently no oil separator on that model. So I am sure that the oil tank breather hook up is exactly like what is shown above. If you want to hook up an oil separator I am sure you can get the Mark III oil separator to work. I am pretty sure that the oil separator would have been mounted in the same place as in the Mark III. The reason I say this is because the hose from the oil tank to the oil separator and the hose from the oil separator to the inlet manifold T fitting are the same part numbers. Of course you would have to figure out a hose arrangement from the oil separator breather hose to the air box because the hose fitting location on the Mark III and Mark IIA air boxes are different. So maybe someone with a Mark III that has the oil separator still installed can supply some pictures. That would probably be a big help for you.
 
PeterJoe said:
I am pretty sure that the oil separator would have been mounted in the same place as in the Mark III. The reason I say this is because the hose from the oil tank to the oil separator and the hose from the oil separator to the inlet manifold T fitting are the same part numbers.

However, the actual Mk2A separator body had a different part number to the Mk.3 item. [Edit] Also, the metal tube that connects the separator to the airbox and the grommet it passes through on the Mk.3 (065497 "Tube, Metal", and 067709 "Grommet") are not listed for 2A.


PeterJoe said:
Of course you would have to figure out a hose arrangement from the oil separator breather hose to the air box because the hose fitting location on the Mark III and Mark IIA air boxes are different. So maybe someone with a Mark III that has the oil separator still installed can supply some pictures. That would probably be a big help for you.


Mk.3 airbox, with the separator hole in the usual MkIII position:
just finishing


Either the oil separator was mounted in a different position on the 2A (as we haven't as yet seen a 2A airbox with the hole where it is on the Mk.3 airbox) or, perhaps it wasn't fitted at all, or not to all 2A models, even though the oil separator parts were listed for the 2A, however, I vaguely remember seeing a photo of a Commando, with the separator, but not in the usual MkIII position?

PeterJoe said:
Of course you would have to figure out a hose arrangement from the oil separator breather hose to the air box because the hose fitting location on the Mark III and Mark IIA air boxes are different.

Stephen did only ask if a 2A had one or not, so it seems hardly worth the bother of fitting the original separator parts-unless of course he is aiming for a 100% original restoration?
 
L.A.B. said:
Stephen did only ask if a 2A had one or not, so it seems hardly worth the bother of fitting the original separator parts-unless of course he is aiming for a 100% original restoration?

Well according to the parts book the Mark IIA's did indeed have an oil separator. It's hard for me to imagine that they would put an oil separator on some of the Mark IIA's and then not on some of the other IIA's, and then later use them on the Mark III. However, Norton was not very good at their documentation especially for the year 1974, so I suppose anything is possible.

Why were oil separators installed anyway? The Mark II's never had them. It seems nowadays nobody wants to bother putting them on anyway, favoring catch bottles instead.
 
thanks to everyone whos helped here.

i've do want to get close to 100% correct, but it seems correct is a bit vague. its even worse on laverdas and ducatis.

anyway put a pipe from the oil tank into the top of the airbox.

thanks

Stephen
 
one last question....

does the speedo go on the left or right if your sitting on the bike?

ive seen pictures of it on the left but the cables a bit tight.

thanks

stephen
 
thanks

does the cable go under the frame and up the down tube or cross under the bike and up?

thanks
 
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