Hi Vargar,
We are very close to the same mods. Here is what I have on my 220:
RB modded Air Stryker Carb (a 35mm carb bored to 36mm)
RB modded head
VForce 3 reeds
NoToil Air Filter
Air Box lid removed
Wiseco Piston and rings
K-35 FMF Gnarly Torque Woods Pipe
TurbineCore2 Spark Arrester/ Silencer
Fredette torque ring. (now removed, get rid of yours too)
Fly Wheel weight
Running 50-50 premium and VP C-12 Race Gas mixed at 40:1 with Maxima Super M
Now for jetting:
#38 pilot
CEK 3rd clip from the top
140 main
Also, the air screw is between 3/4 turn and 1 full turn out depending on elevation and air temp. I adjust it a few times during a day's ride.
I just changed from a 145 main due to the warmer weather. I have noted more spooge in the last couple of weeks. The 140 was tested on my property at 1800 feet and 85 degrees air temp and ran fine. It was then run at 4000 feet up to 6000 feet from an air temp about 55 to 72 degrees as the day warmed up. It ran great. Spooge is now gone like it was with the 145 during winter.
I recommend you drop to a 145 main and do a WOT plug chop the CORRECT way. (Don't know the correct way? I think it is in the link to Canadian Dave's site). Then if things look good there, leave it. If it still looks rich, then bump down to the 140 main. I don't recommend moving the main to 140 right off the bat. The C-12 tends to go a long ways and allows my bike to be jetted leaner than usuall. When I was running straight C-12, I was down 2 more sizes on the main from 145 at the leanest point without coming close to being too lean. (based on the mixture ring on my plug after several WOT plug chops.)
Get ready for some excitement because once you have that carb dialed in, including the air screw, That bike is going to amaze you. It will easily pull the front end up in 2nd gear from a crawl, no clutch, just wick the throttle from shut to 1/4. Instant lift. Awesome for logs, or anything else you need to clear.
I don't know what gearing you are running, but right now I dropped the front sprocket by one tooth: 12 and left the rear stock. I hardly need first gear now. 2nd is much more range and user friendly for anything but picking up after a crash on a steep hill, or gettng out of a ditch; things like that.
If you have ANY questions on any of this, just let me know. I would be happy to help you get this sorted out. Ron Black is an awesome guy and once you get the carb dialed in, let him know where you ended up. He can use the info for more enhancements to his products.