Mike,
Ian's plugs are what a good plug should look like. Dry electrodes, a light tan or greyish tan insulator, and usually wet around the threads but not always. Your plugs do look to be on the rich side.
Your best bet might be to set the carbs to factory specs and see what happens. You can get the bing specs from CPS Airwolf as Ian suggested.
Ideally, you want the engine EGTs to run around 1150f. at full throttle. 1200f.is the do not exceed temp. Temps should rise smoothly as throttle is advanced.
The WOT temp. is controlled by the main jet alone, the mid range temps are controlled by the jet needle and needle jet, and the idle by the idle jet and idle air screw.
Once you dig into the carb, you'll find that its not complicated. The CPS tech info articles go into great detail on how to adjust the carb. There's an old saying that 2 cycle engines run best just before they melt and the melting temp of aluminum is 1350/1400f. Just don't exceed the max allowable 1200 temp and you'll be fine.
With the oil injector, stick with the suggested oil fuel mix. Also make sure the injector timing marks line up properly. The beauty of the injector is that once you are above idle, the oil is mixed at the proper oil/fuel ratio, but at idle, the ratio changes so that you use much less oil and avoid oil fouling at low RPMs. Once you get the carb set up, you rarely have to change anything except seasonal main jet changes and that is a ten minute job.
If you get a chance, let us know what your EGTs are at WOT and cruise rpm. With those two numbers, we can give you a good idea which way to go.
Bill.
