Re: Boyer Ignition
Posted by gasman on Mar 29, 2014; 9:24am
URL: http://silk-motorcycles.221.s1.nabble.com/Boyer-Ignition-tp5000987p5001018.html
After just replacing the Boyer with twin points and condensers I can say for a fact that the Boyer does cause the unburnt fresh mixture to fire at the bottom of the stroke, on a Scott anyway. The pinking type noise has gone, better acceleration, cleaner running, pain to start. I have now stripped the engine and found the bottom end was full of carbonised oily mess, this was after only 100 miles or so with a completely rebuilt engine. The stresses caused by extra firing i.e pinking type noise has damaged the gudgeon pin holes in the pistons, signs of wear on both big end pins, thrust washers worn etc etc. After finding this I am convinced that my first Silk suffered in the same way as the bottom end was always a dirty black mess. I have rebuilt countless numbers of two strokes in the past and never had this sort of problem. I can confirm without a doubt that my Silk will not be getting electronic ignition with a wasted spark, we will see how well that one runs. I'm saying no more on this subject apart from does anyone want the bag of powder that my old unit has been turned into, made me feel better.
Kev