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Rear isolastics

 
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Roy
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PostPosted: Thu Aug 05, 2004 3:46 pm    Post subject: Rear isolastics Reply with quote

Could anyone tell me the correct lenght of the rear tube that houses
the isolastic mountings, as the one i have seems to have 35mm
to the engine plate one side and 40mm on the other.this would offset the
swingarm and engine plates by 5mm from centre of frame , or is this correct.

Thanks Roy
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illf8ed



Joined: 30 Dec 2003
Posts: 475

PostPosted: Fri Aug 06, 2004 5:04 am    Post subject: rear isolatic position Reply with quote

Hi Roy,

I can't understand your reference point origin, but I just measured my '72 roughly from the outside of the alloy "Z" plate to the engine plate. It's about 4 1/8" on the timing side (right side) and 3 3/4" on the drive side (left side). Looks like Norton offset the whole thing to the left assuming the frame wasn't made offset.
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Roy
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PostPosted: Fri Aug 06, 2004 10:36 am    Post subject: Isolastics Reply with quote

With the swinging-arm and engine plates removed from the frame (in one piece) We now have access to the isolastic mounting . The tube that houses this , is the one i need to know the lenght of , with the isolastics
removed and end plates removed . then measure from the end of the tube to the engine plate (both sides) , rest as in first posting.

Thanks david , Roy.
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illf8ed



Joined: 30 Dec 2003
Posts: 475

PostPosted: Fri Aug 06, 2004 11:26 am    Post subject: rear isolastic Reply with quote

I can't help you with this measurement as my Commando is assembled and running. However from the measurement I posted it appears normal that the left side is shorter than the right for the dimension you have in question. The measurement I did would be a function of tube end to engine plate.
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illf8ed



Joined: 30 Dec 2003
Posts: 475

PostPosted: Fri Aug 06, 2004 11:27 am    Post subject: rear isolastic Reply with quote

I can't help you with this measurement as my Commando is assembled and running. However from the measurement I posted it appears normal that the left side is shorter than the right for the dimension you have in question. The measurement I did would be a function of tube end to engine plate.
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PostPosted: Wed Aug 11, 2004 9:40 am    Post subject: Reply with quote

Roy,

I can confirm - that on my collection of 1970 Commando bits - that the tubes extend 38mm (right side) and 33mm from tube to the outside of the cradle.

I hope that lets you rest easy.

Phil
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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.