Misc: Everything Else Norvin Rebuild

oexing

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Chris, did you try that before ? I imagine there is a lot of tension on that ring from the spokes. So I guess that ring had to be very massive. I was thinking about special welding but magnesium is a bit problematic and it would not be done at acceptable price most likely. Instead I´d go for just a new hub, still in production from Molnar and other sources. Actually I don´t need to repair that pictured hub, got a perfect one from a friend, the golden painted in the photo. But then there is no active project to include the Fontana for a while, may go onto a 750 Laverda. In my eyes a Fontana is great for Eglis but not quite in the spirit of more standard Rapides or Shadows so I will keep the twin drum set albeit my own design I think.

Vic
 

vibrac

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In among the drivel one reads in bike papers was a nugget of interest about the new Brough Superior SS100.
Yes I know what's the market for a £60K bike with a nod to a 1930 design? (and this from a country with a 50mph limit on single carriageways)
Anyway tucked away in the specs was the front brake which is a 4 (yes 4) X230mm dia discs front on a cotton reel hub arranged on each end with 4 pot calipers, braking distances are not quoted on road tests nowadays, but the hack said they were "stupendously powerful " lets see 230mm is about 9 inches in real money OK I could live with 180 to keep the profile near the original 7" drum it said they were based on Aircraft brakes, not for use on Bramptons though methinks
 

BigEd

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In among the drivel one reads in bike papers was a nugget of interest about the new Brough Superior SS100.
Yes I know what's the market for a £60K bike with a nod to a 1930 design? (and this from a country with a 50mph limit on single carriageways)
Anyway tucked away in the specs was the front brake which is a 4 (yes 4) X230mm dia discs front on a cotton reel hub arranged on each end with 4 pot calipers, braking distances are not quoted on road tests nowadays, but the hack said they were "stupendously powerful " lets see 230mm is about 9 inches in real money OK I could live with 180 to keep the profile near the original 7" drum it said they were based on Aircraft brakes, not for use on Bramptons though methinks
I looked closely at these a few years ago when the new Brough Superior appeared at the motorcycle show and researched on the internet to see how they worked. I can see that it is a way to increase the braking area without increasing the diameter but other than that I saw it as an unnecessary complication and a bit of a gimmick. There are lots of incredibly good brakes available without the extra complication used here.
Note: The speed limit on single carriageways in the UK is 60 mph unless otherwise posted not 50 mph as posted above.
I'm not much of one for originality. A Norvin is a special and what made specials special was the diverse components that they were made up of. The more diverse the more special they were.
 
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Chris Launders

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Apparently early Oldani's were prone to breaking the spoke flange and they later changed to a steel spoke flange, I've seen several. there's not that much tension on spokes and they operate in opposing directions, look how thin a standard Vincent spoke flange is. I have a Fontana with a couple of spokes broken out and intend to re-flange it.
Chris.
 

Spqreddie

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This is the magnesium 250 Fontana replica, on wich i am working to for adapting it to my Rapide. The rim is a flanged alloy type WM2, and the Tyre a Speedmaster MKII, I have been told by an Avon engineer that the Speedmaster was actually disinged for a WM2 rim witdht. It's a bit larger then than the original rim, but i hope this will give slightly more tyre contact for the bigger brake. I am still thinking on where to fix the torque bar. i dont want to drill the balades, so i must make a clamp or have a rally long torque arm up to the fork links spindles.
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vibrac

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I

Note: The speed limit on single carriageways in the UK is 60 mph unless otherwise posted not 50 mph as posted above.
.
According to the rag I read the SS100 is made in France and I know this year from the waves of boredom on the single carriageway to Dunkirk 80kph is a good as it gets. Any side road or farm track intersection and its less. Not a problem next year, I have no wish to join a queue for an international driving license to sample that pain again.
 

Rixon

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Update. Bought the TZ brake with wheel for what I think is a decent price, around the same as a replica Ceriani. As a bonus I also got a new old stock Goldie silencer in the deal.

The brake looks in decent condition and should turn out well, going to strip it down and have it vapour blasted.

I was intending to use either a Goldie silencer or straight through pipes but I thought they would probably be too noisy for road use. I've seen the push-in baffles but it seems rather contrary to have a straight through exhaust and then put a baffle in the end. Anyone had any experience ?

My only experience is with a classic Jaguar exhaust system where a reducer near the head was ok, but the same reducer near the end of the exhaust dropped the performance.
 

Bill Thomas

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For me the Armours Stainless Vincent, Is the best for performance, Not too much noise.
The hole inside WAS bigger for the Stainless, But I was there a few months ago and they told me they now
Fit the same size Baffle in the Chrome one.
I had a Goldie one years ago, And it had a very small baffle hole, So have a look inside, What ever you buy.
Cheers Bill.
 

Chris Launders

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I have a straight through Goldie on my Norvin, it's a bit louder than my straight through "standard" silencer on my Shadow but not at all anti-social, by straight through I don't mean empty, they have at least a perforated tube inside.
 
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