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Measurement between swingarm fork legs N15

Norton Models (not Commando or P11)

Measurement between swingarm fork legs N15

Postby Norton46 » Tue Feb 14, 2017 10:01 am

Hello
I am having a bit of bother with this N15 rear wheel, seems to that the distance between the forks is greater than the stack up of the bearings and distance pieces?
Image
Image

Anyone have the measurement for between the forks?
Seems like a lot to just tighten it down.
The inside measurement on these fork legs is 8 3/8".
Other swing arms I have are 7 3/4" (Ranger) and 7 7/8" (early Atlas, I think)

I have contacted Andover Norton for the measurements of the distance pieces for 03.0017 and 03.0018 to confirm those.

Norton46
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Re: Measurement between swingarm fork legs N15

Postby BillT » Tue Feb 14, 2017 7:22 pm

I believe 8-3/8" on the swing arm is about right. Same as my '67 G15CS. You may be missing a piece.

I looked through my assembly pics, but didn't take any of the rear wheel assembly. I seem to recall a spacer inside the brake backing plate.
'73 Norton 850 Commando - 3030xx
'69 Norton Ranger 750 - P11/1289xx
'67 Matchless G15CS - G15CS/1235xx
'61 Matchless G80CS - 61/G80CS/41xx
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Re: Measurement between swingarm fork legs N15

Postby Rohan » Tue Feb 14, 2017 9:43 pm

BillT wrote: I seem to recall a spacer inside the brake backing plate.


Yes that could well affect the run of the chainline too.
Thats one aspect that can be eyeballed and seen to be reasonably accurate,
with the chain fitted...

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Re: Measurement between swingarm fork legs N15

Postby Norton46 » Wed Feb 15, 2017 9:07 am

Hello
Received the measurements 03.0017 = 43/64" or 0.671" and 03.0018 = 1 5/64" or 1.0781".
This still leaves 23/64" to be accounted for.
I will fit up and check rear sprocket to counter shaft sprocket alignment again, but will really need to install engine and plates and snug everything.

Norton46
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Re: Measurement between swingarm fork legs N15

Postby pierodn » Thu Feb 16, 2017 8:05 am

Hi.
I can say that Andover supply both the spacers for N15.
Piero

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Re: Measurement between swingarm fork legs N15

Postby pierodn » Thu Feb 16, 2017 8:11 am

Hi.
Please, coul you post a picture of the bottom rear mudguard fixing brackets?
Thanks
Piero

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Re: Measurement between swingarm fork legs N15

Postby Norton46 » Thu Feb 16, 2017 3:33 pm

Piero
Here is the best I can do right now. When I take apart again I will take more. Ciao!
From the side.
Image

Looking down.
Image

Norton46
Posts: 97
Joined: Sun Jan 09, 2011 5:28 pm

Re: Measurement between swingarm fork legs N15

Postby pierodn » Thu Feb 23, 2017 12:09 am

Norton46 wrote:Piero
Here is the best I can do right now. When I take apart again I will take more. Ciao!
From the side.
Image

Looking down.
Image

Hi.
Thank you so much.
Is very clear.
Piero

pierodn
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Location: Gaeta Italy

Re: Measurement between swingarm fork legs N15

Postby Norton46 » Mon Mar 20, 2017 5:30 pm

Just some closure information.
I messaged a owner on an ebay listing for a N15CS swingarm and his inside measurement from plate to plate was 8".
I assembled with correct distance pieces and tightened it up and it runs true, aligns with the front wheel and the secondary drive chain is aligned.
Not sure why it is sprung out??

Norton46
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