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New Amal carb for 850 problem (solved!)

 
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Dennis T
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PostPosted: Tue Apr 20, 2004 6:32 pm    Post subject: New Amal carb for 850 problem (solved!) Reply with quote

Putting last things together after full motor and tranny rebuild on '73 850 but had a problem with right cylinder/carb not running right. Did process of elimination (switched coils, plug wires, etc. has new wiring harness) and finally came down to the new Amal carb. Plug showed foul and muffler spitting, running rough and crapping out at 4k rpm. Now remember, brand new Amal carbs all set up for the 850. Pulled top off of the right carb and the needle out. Found that the needle circlip was in the wrong slot, resulting in way too of a rich mixture. This one was placed in a different slot than the left one which was correct. Boy, talk about an easy fix. One clue to carb problem was that when adjusting the right carb mixture screws it took a lot of turning to get any response from the carb at all. When needle put in correct slot, carb responded immediately to any little adjustment. That was a clue to watch out for when you are trying to tune your carbs. Bike now runs smooth, no cutting out and the plug looks perfect. Just one very little error can cause big running problems.

Dennis
Vancouver, Washington
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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.