swooshdave wrote:Seems like there are a crapload of Ducatis down there.
And a few Nortons. You guys have good taste.
A lot of it is due to ' Japanese Imports"
The Japanese like non Japanese stuff....but after a few years they get new stuff....the old stuff comes to New Zealand..... sadly a lot of our cool old stuff goes overseas......thats the nature of stuff
Probably more Nortons these days than Bevel Ducatis.How are you finding the Ducati?
Have not sealed the deal on the Cagiva yet.
Stil sorting out the 860. Turning it into a proper bike by putting Norton parts on it.
(front the Beveheaven forum)
Obviously has seen better days.
Someone (name withheld to protect the guilty) said that he had used Norton intake manifold insulators on his 750. At a couple bucks each they are significantly cheaper than the Ducati ones. Norton didn't use rubber based insulators like Triumph or Ducati, instead its a phenolic insulator (phenolic materials can be engineered to have extremely low thermal transfers, ideal when protecting the carb from the head heat). While the rubber blocks do they same thing as you know they tend to shrink and leak.
The challenge with the Ducati manifold is the spigot and I believe pins holding the blocks in place. I think there are pins, I don't know for sure as there aren't any on my bike.
While the intakes are the same on the 750 Norton Combats and the big Ducatis (32mm) it's the spigot that throws the next roadblock in place. The options are to mill off the spigot or opened up the insulator.
By opening up the insulator with a Dremel I was able to get them to fit over the spigot. Because the phenolic insulators are so efficient typically you only need one thin one, but because of the spigot I just used two insulators. I had not anticipated having to use two for each carb and had just bought three (incase I messed up one carving it up) so for now I just did the front carb as it was the worse (and easiest to get to).
Lastly the bolt spacing in slightly different, so I elongated the holes in the insulators a smidge. Maybe a millimeter.
Then assembled with Yamabond (actually I think it's Threebond but you know what I mean) and since that was about midnight last night I didn't fire up the bike as I'm quite sure all of the neighbors would have called the cops on me.
So the test will be in a little bit and I'll let you know what happens. I definitely had a bad leak so it should be apparent.
If you're wondering you can get the insulators from any Norton dealer. I use Old Britts and they are wonderful to deal with. Well, except their website uses frames which is a pain to link to.http://www.oldbritts.com/alt_067842.html
(what you are looking for is a Gasket, Heat Insulator, 32mm for a 1972 model (they also used them on the later 850s).
The Norton part number is 18-063458 and the cost for one insulator is about 1/10th the cost of a single Ducati rubber one. So, like I said, I can afford to experiment.