09-09-22, 11:50 PM
(09-09-22, 09:50 PM)b1k3rdude link Wrote: What would advancing the iginition by 4 degrees do to the fuel economy just out of curiosity?
I've got a 4 degree advancer on my FZ6 and I can't say I've really noticed any change.
The reason the ignition is not usually advanced is that bikes have to be made to run on the crappy fuel that's used in some countries (often because it's been adulterated to save a few pennies). This means that it's best to retard the spark to give the best possible chances of a clean ignition.
UK fuel is good quality, so the spark can be advanced to give more power, but it's still burning the same amount of fuel, just at a slightly earlier point in the piston's travel.