Re: Boyer ignition problem
Posted by
hendred on
May 01, 2020; 9:57am
URL: http://silk-motorcycles.221.s1.nabble.com/Boyer-ignition-problem-tp5001882p5001885.html
I guess you are strobe timing the ignition on the alternator rotor. If you are, which way does the strobe mark move on increasing engine speed - clockwise or anticlockwise? Got bored with TV last night and looked around Google about Boyer problems. A lot seem to be due to poor electrical connections or suspect batteries. It seems some Boyer systems go to full advance on low volts. Can be a big problem with electric starters - not applicable for Silks! If you can't find anything else wrong have you checked the supply voltage at the Boyer box - it should be the same as the battery if all connections are good.
The Lumenition system was changed in the mid 1980's from the MK16 to the MK17 and not surprisingly the components are not interchangeable. I don't know which model you got from Ebay. Identification of the Lumenition model can be found on their website at:
https://autocar-electrical.co.uk/images/pdf/pdf_optronic/Guides/TB17-Optronic-Ignition-Check-V1.pdfFrom a Silk perspective the main difficulty with the later model is that the optical sensor is different and won't fit directly on the mounting plate. I met Tony Donnithorne at Popham a few years ago and we were discussing Silks. He had a Silk and fitted the later type and kindly sent me instruction on how to modify the Lumenition sensor to fit a Silk. If you have the later type let me know if you would like the information from Tony.