Norton Commando
Jerrydoe.com  Forum Home  Norton Commando Forum  Photos  [FAQ]  [Search]  [Memberlist]   
 [Profile]  [Check your private messages]  [Register]  [Log in] 
Commando Drive Chain

 
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles.
View previous topic :: View next topic  
Author Message
Nortoncommandoneil



Joined: 09 Jun 2004
Posts: 4
Location: England, UK

PostPosted: Wed Jun 09, 2004 12:06 pm    Post subject: Commando Drive Chain Reply with quote

Hi,
I have recently purchased a new Renold Motorcycle Chain for my Norton Commando 850 MK2A Interstate. The problem i'm having is that the chain is hard to adjust to keep the correct amount of tension, it is either tight or slack when checked in different positions around the chain. I have put this down to a worn chain. I am not certain of the condition of the drive sprocket but have been told that when fitting a new chain it is advisable to change it. Can anyone advise me on this and what sort of task is it to change the sprocket if needbe.

Thanks,

Neil
Back to top
Jason Curtiss



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

PostPosted: Wed Jun 09, 2004 3:53 pm    Post subject: Reply with quote

Neil,

You can't go wrong installing new sprockets with a new chain. A worn sprocket will wear the drive chain prematurely. However, most people do not change the sprockets when they install a new chain because of the effort and money. The drive transmission sprocket will show wear before the rear wheel sprocket, owing to its smaller size. So, an economical compromise would be to repalce the transmission sprocket with the chain.

Having said all that, it doesn't sound like you have sprocket problem. Instead, it sounds like your chain is rusty and stiff in some places and loose in others. You should be able to check this by looking. Also, you need to check how much wear you have in the chain.

First clean the chain thoroughly with gasoline and a brush. Let it dry and check the stretch, which is a good indicator of chain wear. To do this, compress the chain and measure its length. Then stretch the chain out and measure its extended length. The difference between the two measuremts should not exceed 2% of the chain length. For your chain this percentage is about 1-1/8". If your chain is stretched beyond this limit, it's time for a new one. And if your chain is worn to this extent after only a few thousand miles, then it sounds as if you need new sprockets.

Hope this helps,

Jason
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles. All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

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.