They dont really make many aftermarket parts for our ignition system other then the advancer. We dont have a system like the older bikes. Each one of our plugs has its own coil that sits on it. With this you dont have high power coils for it..
You can get stuff like a revlimiter... what are you trying to do with it?
Dude theres a company out called direct hits.(Directhits.com)They have a amplifier that screws on to your spark plugs so that it can amplify the voltage running to the plugs.Drag bike tested them on a bike and got 5 hp ofcoures they had to go up on the jetting to compensate for the fatter spark and also they used a non resistor plug C9E for suzukis. I personally run them on my f4 jetted with no air filter and i've run a best of 6.73 @ 105.2 with that in the 1/8 mile.On my 96 750 I run Nology plug wires and Nology coil amplifiers I picked up 1 mph in the 1/8 mile switching to that set up.