rich/lean

For adjusting mixture and seeing the real picture don't forget to try the 
Colour Tune transparent spark plug. You can see the color of the combustion 
and figure out if the mixture is OK at different RPM 's. As you rev up the 
engine , you can watch the flame color change. This tool will tell you right 
off if the mixture is alright or not. It has solved several SU problems for 
me.        BOB in Kansas