Re: Ignition timimg silk 700s m2

Posted by Hendred on
URL: http://silk-motorcycles.221.s1.nabble.com/Ignition-timimg-silk-700s-m2-tp5000871p5000876.html

Just to add a little more to the confusion, my late MKII (engine 126, 38mm carb.) original handbook quotes 0.2" or 5mm advance and seems to go well on this setting.  The bike is dated April 1979 and the handbook is for the MKII dated May 1977 with many hand revisions.  If you have the handbook for the bike go for the settings in it - they seem to work!  

The 0.3" advance is equivalent to 37.5 deg. btdc according to the handbook - this hasn't been amended in my handbook book as obviously at 0.2" the advance in degrees will be less.  I'm messing around with trigonometry to try and work out the advance in degress for 0.2"advance.  It's proving an interesting exercise - there is one assumption - the conrods are all the same length in all engines?