Norton from Australia

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grandpaul said:
Shoot, I don't think any Commandos with 60+ HP could even pull ONE dead Shetland pony for 10 feet...
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We obviously now know what happens at a Texas bike rally.
 
Nice piece of workmanship.
As most people here I have been involved with Norton's for decades and is something that just can't be explained to rational people.
This is another example of how 'Bent' the mind can get on Nortons. :lol: :lol:
Most of us in the community totally get it and I for one am a little envious as he has accomplished what has been dreamed of.

I say job well done. :!:
 
15073jrmd said:
seems tintin has a bee in his bonnet about this bike. why so negative fella?
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Well, I like the bike (except for the headlights) and to a certain extent appreciate the engineering and machining- I just don't like the bragging.


Tim
 
I wonder what you are referring to as JS's turned pistons. As far as I know all pistons are turned to finish them. Diamond tooling and a CNC provided "cam grind" is state of the art as are the JE pistons that Jim Schmidt uses. Jim Comstock
 
That is a pretty cool bike. I'll agree with Tintin saying the headlights kind of suck but the work that went into everything is mind blowing.
 
comnoz said:
I wonder what you are referring to as JS's turned pistons. As far as I know all pistons are turned to finish them.
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Depends on what you refer to as "all pistons". All Norton aftermarket pistons? Yes, I'd agree. All RPE pistons? Well, turned yes but on pretty fancy machinery and not on a std lathe -even very high dynamic CNC lathes are not really good at producing the ovality needed. As you'll probably know a "latest engine technology" piston is slightly oval (from top) and convex (from the side) for wear pattern and heat expansion (well, latest is a bit misleading, they are oval and convex for quite some time). I'd be (postively) surprised if the JS and Village pistons are convex and I'd consider it amazing if they machine them oval - which would mean they must have some pretty decent machining capacities at their hands. The picture which JS has on his homepage looks at least as if the pistons are not oval judging by the wear pattern.


Tim
 
Yes, even Norton aftermarket pistons are now contoured on nice modern machinery and the fit and wear are very good. And JE pistons such a Jim is using are very high quality pistons manufactured on state of the art CNC machinery that contour the piston skirts. JE is one of the leading high performance piston manufaturers in the US and produce very nice stuff. Jim
 
comnoz said:
Yes, even Norton aftermarket pistons are now contoured on nice modern machinery and the fit and wear are very good. And JE pistons such a Jim is using are very high quality pistons manufactured on state of the art CNC machinery that contour the piston skirts. JE is one of the leading high performance piston manufaturers in the US and produce very nice stuff. Jim
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So what is he (or Village) machining then exactly - just the valve pockets and compression height? Take a look at the picture on Jim's hompage:

http://users.gotsky.com/jimschmidt/pispinused2.jpg

The wear pattern looks a bit questionable - like these are not really oval I'd say. And how do you determine how oval and convex you want them etc.? But however, all these pistons are way better than the stock stuff.


Tim
 
Tim,
Jim Schmidt sells the pistons as they come from JE. I see in the picture of his bike that he has drilled holes in the skirt and it looks as though he may have worked on the skirt with a bit of emory paper. From the wear pattern it looks as though there is more piston to cylinder clearance than is needed. Extra clearance is not a bad idea when there are some unknowns involved. Jim
 
I wonder if drilling those holes might affect the expansion of that area also, Just a thought.
 
Drilling would likely affect the expansion. I mentioned it to JE one time and they said I was on my own. Jim
 
comnoz said:
Jim Schmidt sells the pistons as they come from JE. I see in the picture of his bike that he has drilled holes in the skirt and it looks as though he may have worked on the skirt with a bit of emory paper.....
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Yes, you're right there, that's not a standard piston and he says this in the text so I shouldn't give that too much attention probably. Furthermore I have to say that I find the level of engineering and redesign on JS' stuff more interesting than what I can see on the other bike. Well, I'm actually thinking of buying some of his stuff..... :wink:


Tim
 
comnoz said:
I wonder what you are referring to as JS's turned pistons. As far as I know all pistons are turned to finish them. Diamond tooling and a CNC provided "cam grind" is state of the art as are the JE pistons that Jim Schmidt uses. Jim Comstock
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Pistons used to be ''ground ''on specific machinery, the machine normally had about 3 different profiles for different use, air cooled water cooled etc. , but they are slow by todays standard,when they started cam turning pistons some manufactures put a very coarse finnish on them we were told at the time that it was to prevent sesiure on newly rebuilt engines,it held lubrication and cut down on surface contact, as JIM points out nearly all piston are turned these day but on specific machinery to get the taper and ovality correct, and from what I have seen over the last 25 years the sizeing tolerance has improved a lot on mass produced sets.
Nice looking work though, don't like some of the styling but thats only my opinion, and remember 20 years ago John Britten built a bike in his shed and made the rest of the world look stupid
 
Yes I don't care much for the styling either. 120 hoursepower-well maybe.
I was racing at Daytona the year Brittain showed up with his beautiful machine. Blew everybody away until the race. Then reversed connections to the alternator caught up and ruined the day. But what a show. Jim
 
I've noticed our brethren from the penal colony have been very quiet on this topic, is it all new news to you to ?
 
swooshdave said:
As many derogatory terms that have been tossed back and forth I doubt it will even get noticed.
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"The sheep is a liar!"


SCNR


Tim
 
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