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Those Things that go up and Down

 
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Scooter62



Joined: 05 Dec 2003
Posts: 166
Location: South Florida

PostPosted: Thu Jul 01, 2004 10:02 am    Post subject: Those Things that go up and Down Reply with quote

PISTONS; It seems there are several choices out there for replacement oversize pistons: Norvil sells a set of cast pistons by the OEM manufacturer for about $180 plus shipping, theres a company in St. Pete FL selling a set of cast pistons (I believe made in Taiwan) for about $100 plus shipping and I seem to recall someone selling forged "racing" pistons
too (J&E ?)
So the question is; Has anyone out there used any of these and what has their experience been? Thanks,

Scooter
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norbsa48503



Joined: 07 Apr 2004
Posts: 1034
Location: Flint, Michigan

PostPosted: Thu Jul 01, 2004 4:07 pm    Post subject: Reply with quote

I run the power max pistons from Norvil and I like them. They have a little extra metal in the tops were the action is. I don't like the cir-clips they use and next time I will find fonalic buttons to replace the retaining clips. I also had mine coated with a baked on slippery grey stuff. I have been in there since and it works well. The rings that come with these are much better than the cheap pistons. norbsa
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Ron L



Joined: 27 Feb 2004
Posts: 1147
Location: Ohio

PostPosted: Fri Jul 02, 2004 4:26 am    Post subject: Reply with quote

I generally stick with the cast AE/Hepolite pistons (OEM), but have used GPM (Italian) with good luck. I have done one motor with a set of Japanese pistons, but with AE rings. These were all street motors, and all are still running.
Friends with vintage racers are either using AE (Powermax) or custom made forged pistons (JE or Wiseco).
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Jason Curtiss



Joined: 14 Jun 2003
Posts: 667
Location: HOUSTON, TEXAS

PostPosted: Fri Jul 02, 2004 9:24 am    Post subject: Reply with quote

Scooter,

I, too, use Hepolite pistons in street motors. And for a racing motor, I would probably install a quality forged piston, such as Weisco.

Regards,

Jason
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norbsa48503



Joined: 07 Apr 2004
Posts: 1034
Location: Flint, Michigan

PostPosted: Fri Jul 02, 2004 1:26 pm    Post subject: Reply with quote

This is the only place I know of that will produce teflon buttons for retaining wrist pins. If I were doing it all over again that and a teflon coating is the way to go. If you have ever seen what a loose clip can do to a bore you would know what I mean. http://www.venolia.com/ norbsa
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The Unapproachable Norton Commando

At the end of 1967 the Norton Commando was announced.

The Norton Commando was greeted with a certain amount of scepticism because on first sight the commando appeared to comprise of the old Norton Dominator twin cylinder engine mounted at an inclined angle in a set of new cylinder parts.

It was not realized that the new Norton Commando Isolastic method of engine suspension damped out all engine vibration and produced a machine which had uncanny smoothness for a vertical twin. In due course the critics were silenced and the Norton Commando had the distinction of being regarded as the first of todays so called superbikes. There can be little doubt that the original design concept of the Norton Commando has proved correct, since comparatively few modifications of any real consequence have been made since production commenced during 1968.

Now nearly 40 years later Norton Commando riders like us are a breed of our own, and as far as we are concerned its still more fun to go for a blat on the old Norton Commando, and fast. As a Norton Commando owner and enthusiast, my goal here is to promote and give credit to those who keep the Norton name going.

It is more deserving to give credit to the Commando itself, for after all these years it continues to be respected. The original Commando designers like John Favill are those who deserve the credit for developing this incredible motorcycle.

The Norton Commando Roadster and Interstate of the late seventies, never died. Although the Norton Villiers factory dispersed the tradition lived on. Today Kenny Dreer in the USA is developing the new 952 CC Norton. What a great looking bike this is, and its engineering is still based on the original layout. It will be interesting to see how the new 952CC Norton does in todays tough motorcycle market. One thing is for sure, I would own one if I could afford it.