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Re: Boyer ignition problem

Posted by hendred on Apr 30, 2020; 7:08pm
URL: http://silk-motorcycles.221.s1.nabble.com/Boyer-ignition-problem-tp5001882p5001883.html

I'm still running the Lumention system so have no direct knowledge of the Boyer system.  The Boyer has been used successfully so it can be made to work.  A couple of observations:

The standard Norton Boyer gives max advance at about 3200 rpm.  As it is mounted on the camshaft it actually rotates about 1600 rpm.  Mounted on the crankshaft of a Silk it will give full advance at 1600 rpm which is not much more than idle speed.  This was brought up with Boyer by Clive Worrall and George Silk and Boyer will make a system with an advance curve suitable for a Silk.  If you do a search of this site for Boyer and/or Pazon you will find the threads.

The rotor for the Boyer on a Norton rotates anti clockwise, fitted to a Silk it rotates clockwise.  I don't know how the Boyer pickup works but this may be a factor.  Have you told Boyer what bike you are fitting their system on and the direction of rotation?  May give a clue to the problem and a solution.

Hope this helps.