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Heavy Atlas clutch

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Heavy Atlas clutch

Posted by andrew_windsor at June 17. 2017

Hi All,

I have a Dommie Racer with a 750 Atlas engine fitted. I bought the bike a couple of years ago and never run it up untill now, it has had a full nut and bolt rebuild by JMC everything renewed. The clutch is so heavy and no feel to it , i am wondering if it has been put together correctly any help would be greatly appreciated.

Andrew

Re: Heavy Atlas clutch

Posted by graham_reeves at June 17. 2017

Hi

 

Probably the first thing to check is the fulcrum point of the lever. This should be 7/8" and a different one will result in a heavy clutch. Just changing the lever on my bike made a significant difference.

See previous post on this topic:

http://www.nortonownersclub.org/noc-chat/technical2-heavy-twins-forum/157514837

 

There are many others covering this.

Re: Heavy Atlas clutch

Posted by andrew_windsor at June 17. 2017

Hi Graham,

I have taken the clutch lever off and i take it you measure from the  centre of the clutch lever pin to the centre of the cable where it slots in the lever , if so mine is 1", i will try another lever with 7/8"   and see how i get on.                                                              thanks

Andrew

Re: Heavy Atlas clutch

Posted by David Cooper at June 18. 2017

My PO changed the profile of the lifting cam slightly, and mine is easier than most as a result.  I think it needed to be hardened and tempered again but he was a better engineer than me.  I think I've seen this modification discussed on this board somewhere.

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