1972 Honda CB175. If both plugs fire off one set of points and one coil why (with using a timing light) can I set the left side on the "F" and the right side be off?
That's an interesting point. In the fitting instructions for Charlies Place electronic ignition they state something very similar. The two magnets in their replacement rotor are spaced equidistantly, so you'd expect both sides to fire at the same point. They say that in practice this may not happen, and blame the cam chain for this variance.I also have an idea that with an engine like the CB175 uneven wear of the cam chain could cause it.