Let's Talk Timing

[Slick_Nick]

Ignition timing that is. I've tried all three, and I can't decide which I like best. I did notice with it retarted (stator turned counterclockwise) one degree, I had a bit more over rev, but I didn't notice that much of a loss on the bottom. Was it just me?

Where do you run your timing at, and why do you like it there? Thanks!

[fuzzy]

You are seeing what you're supposed to. I recommend stock (for the purposes of other on here keeping there mits off their static timing). The CDI takes care of the rest. You can hole a piston pretty easy messing with the timing. On the 220 your 'mod' may be a good one...to better match the crappy port timing in the cyl.

[Slick_Nick]

What exactly does the CDI do in order to trigger the ignition? In other words, the magneto charges the ignition stator, which generates voltage for the ignition coil, which stores the energy, and the CDI tell is when to fire the coil?

Sorry, I think I'm a bit confused.

[Julien D]

Right. Think of the CDI like the electronic ignition in your car.

[scheckaet]

in other words, leave it alone...

[Slick_Nick]

how does the CDI know when to trigger the ignition coil? Is there a reference signal from the magneto or something?

[fuzzy]

CDI in between stator/mag/pickup and coil. It can fire direct as if it's not there, or delay (retard), or advance. It's a fixed curve programmed in. For instance a retard occurs that's times with mechanical opening of the KIPS based off RPM of the incoming signal. Not sure what else really happens with the curve as you'd have to map it. The factory CDI could be replaced with a programmable MSD type unit, and then you'd have full control.

[Slick_Nick]

in other words, leave it alone...

Why? The shop manual even states that it can be changed to suit riding preference.

[scheckaet]

in other words, leave it alone...

Why? The shop manual even states that it can be changed to suit riding preference.

. You can hole a piston pretty easy messing with the timing. On the 220 your 'mod' may be a good one...to better match the crappy port timing in the cyl.