Measurement between swingarm fork legs N15

Norton46 · Feb 14, 2017

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?

Measurement between swingarm fork legs N15

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.

BillT · Feb 14, 2017

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.

Rohan · Feb 14, 2017

BillT said:
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...

Norton46 · Feb 15, 2017

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.

pierodn · Feb 16, 2017

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

pierodn · Feb 16, 2017

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

Norton46 · Feb 16, 2017

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

Looking down.

pierodn · Feb 23, 2017

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

Looking down.

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

Norton46 · Mar 20, 2017

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??