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Messages - smellybeard

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1
Frame, Suspension and Tinware / Re: Swinging Arm issues
« on: June 13, 2024, 03:13:43 pm »
I've reassembled the swing arm without new bushes or sleeve.
On the advice of an older Manx Norton hand, I've shimmed up the end float. (The design of the assembly and the construction of the swingarm itself is remarkably like a featherbed Manx.)
With the grease nipple in place, this should suffice for the limited use it gets these days. Time will tell if I need to replace the bushes; if I ever do, they will be bronze.

I'd regard the addition of a grease nipple and regular greasing as an absolutely essential modification to this machine even if it is in apparently perfect order.

2
Frame, Suspension and Tinware / Re: Swinging Arm issues
« on: June 07, 2024, 04:10:33 pm »
Hmmmm....

Some silliness on my part: the swing arm wasn't worn, the bolt was loose.

...but why was it loose?
Possibly because the sleeve was seized in the bushes, rusted solid and the cupped washers weren't refitted by the previous owner (and the bike's restorer). Instead he took up the endfloat with with flat washers that were a bit thick for the job. The only way that swingarm was moving was on the spindle and that wore away a bit of clearance inside the frame, letting everything get loose. I haven't ridden the bike regularly in 15 years.

Anyway, the first item of business was to fit a grease nipple and fill it up with grease. It was after that I discovered the loose spindle. Tightened that up and took it for a run up and down a gravel lane. No suspension worth talking about.
Two: take the swinging arm out - which I managed without taking the mudguard off. There are little squares welded to the inside of the frame, shims where the spindle bolt holes are.
Three: pressed the sleeve out. I pushed it back and forth a few mm to begin with, giving it a squirt of penetrating oil each time and then got it moving about a third of the way. I cleaned off the exposed surface with a file and gave it a smear of grease and pushed it back out the other side. It's pitted but the centre wasn't rusty. It was really tight to start with and I had to use the long handle on my press. It fell out when I got to about two thirds through.

3
Frame, Suspension and Tinware / Re: Swinging Arm issues
« on: May 30, 2024, 03:04:11 pm »
Thanks,
Works starts tomorrow.

4
Frame, Suspension and Tinware / Re: Swinging Arm issues
« on: May 29, 2024, 06:07:12 pm »
Quote from: banquo on May 29, 2024, 04:28:05 pm
If doing another, and I do have another, I might drill for the grease nipple first, and try to inject some rust dissolving fluid into the annulus before attempting disassembly.
Excellent suggestion.
My (red) paint is in excellent condition, so I want to avoid as much abuse as I can. Heat is out of bounds. I do have a 10 tonne press and making up tools on the lathe to fit the job is also an option.

5
Frame, Suspension and Tinware / Re: Swinging Arm issues
« on: May 29, 2024, 02:38:34 pm »
So, four years later how is it working?
Would you change the way you did anything?

I ask as I'm about to undertake the same job.

6
Newbies say hello / Re: Hello
« on: September 05, 2018, 05:51:00 pm »
My NF 500 is a very early Carabinieri example. At this stage it's red, has lost its legshields (they're in the shed) and has gained a BSA Gold Star exhaust.
The 1000SP is a handful at the moment. Some work is required before I take it out again. I think I might have a rotten wheel bearing in the back. I'm not happy with the handlebars either - I think Eldorado or NF500 ones would be the biz. I think I'd also like to try a seat like the NF 500s.

Facebook is something I've heard of but have never felt inclined to use.

7
Newbies say hello / Hello
« on: September 01, 2018, 01:09:39 am »
Greetings.
1969 NF 500 owner for many years. Recently acquired an 1000SP sidecar rig.

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