Re: Boyer ignition problem

Posted by Fredvincent on Nov 21, 2020; 6:56pm
URL: http://silk-motorcycles.221.s1.nabble.com/Boyer-ignition-problem-tp5001882p5002096.html

My 2038 has Main Jet 480, Needle Jet 108, Needle 2F1 on second groove from top, Slide 3, Pilot 25 in top of float bowl. This is as the manual for my bike states, except needle in middle groove. The needle was dropped one notch in service. The bike has done 12000 miles so it was running OK up to 2012. May need a bigger main jet now with current fuel available.

I checked my manual for ignition timing. It states 37.5 degrees, 0.3 in BTDC at full advance. This is for a late bike built in February 1979 which is I assume a Peter Green ported bike.

The engine data listed on the forum states 7mm BTDC for Mk 1, 5mm BTDC for Mk2 and 7.6mm BTDC which is 0.3 in for late Mk2’s.