From:Mutt Electronic:pigstye13 -A-
Subject:RE: RE: engine timing Date:Thu Aug 4 21:16:57 2011
Response to:16170
Keep in mind that if the points mounting plate has ever been changed, it's a good chance the marks won't be right. It is best to time the motor off of the frame, then mark the point plate yourself.
In your case, pull the head and gasket. clean gasket surface. Roll piston forward till TDC is reached. Use a dial caliper and measure from the gasket surface edge to the top outer edge of the piston.Write down that number; lets say it is .030" now add 13/64" (.203") to that +.233" push the piston back down into the cylinder about 1/2". Lock the dial caliper at .233" and hold it back in the same spot you used to measure the piston measurement. Hold the caliper firm and using the generator center bolt, turn it clockwise until the piston edge touches the dial caliper. This is the exact spot where you want the ignition to fire. Use a 6 volt test light or a ohm meter to check opening of points. The light should go out exactly when the points start to break (or the ohm meter will show a "open circut") Rotate points plate forward or backwards to achieve this.
On a magneto model, it's measurement is 7/32" (.218")


the original factory timing mark is scribed into the base plate and the plate which holds the point, the two lines should line up, if you have a Rider's Handbook there is a good photo in it which shows that. Looking into the inspection cover the lines are at about the 3 oclock position towards the front of the bike. Kicking back is usually the result of timing that is too far advanced, so retarding it may correct the problem. Make sure you set the point gap first, before adjusting the timing, gap should be exactly .020

Engine kicks back often when starting, but runs good. Should I advance are retard the timing?