Missing Loop on MkII Swingarm

Cammy66

Cammy66

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Hello All,

I've just picked up my frame and associated parts from the sandblaster, and I finally noticed some interesting weld marks on the swing arm. Looking at the parts diagram, there should be a 'loop' welded on this spot on the swing arm. Can anyone advise what that loop is for, and whether I should replace it?

On a related note, is the general consensus that the additional gussets on the inside corners are worth doing? Seems like a good time as any to have them welded in.
 

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  • Missing Loop on MkII Swingarm
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Yes , weld in triangular gussets.
Don't try to straighten up the swingarm itself beforehand.
They were intentionally fabricated up to be bent a bit. L.A.B. can you check on that please ?
 
Torontonian said:
Yes , weld in triangular gussets.
Don't try to straighten up the swingarm itself beforehand.
They were intentionally fabricated up to be bent a bit. L.A.B. can you check on that please ?
Click to expand...

I've had no need to fit them (because the Mk3 has a box-section cross-member) so I can't comment.
 
L.A.B. said:
I've had no need to fit them (because the Mk3 has a box-section cross-member) so I can't comment.
Click to expand...
Same here.
Perhaps someone knows if the factory used a jig set up to weld up the earlier swingarms offset ?
 
Torontonian said:
Same here.
Perhaps someone knows if the factory used a jig set up to weld up the earlier swingarms offset ?
Click to expand...

The original (approx. 1/8" - 3/16") swingarm offset would need to be maintained when the gussets were welded in place.
 
When welding gussets onto a C15 swingarm I used all thread stud plus nuts and washers on the axle end to keep these at the same distance apart and negate any twisting during welding.
 
MichaelB said:
It's for the chain guard bolt.

andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
Click to expand...
That would make sense. No chain guard on the bike when I took ownership. Thank you!
 
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