I just cleaned & rebuilt my carbs. I used a combination of simple green MAX and canadian tire spray carb cleaner. The spray carb cleaner was great at taking off grime on the outside, and when it didn't seem to be doing the job, I soaked parts straight in simple green. Then I sprayed them with carb cleaner to get all the water/simple green off. That seems to be the method that my mechanic and machinist friend use: use any solvent that won't damage the rubber, then rinse it off with carb cleaner to ensure no corrosion occurs later. I was actually pretty surprised that my mechanic friend just started spraying carb cleaner all over my carbs before I had pulled off any of the rubber bits...
I also took apart the pilot and choke pins in the carbs, and cleaned & replaced the o-rings inside the pilot. I was rather surprised that the o-rings in the pilot screws were a strange mix of thin and thick o-rings. I guess a previous mechanic hadn't bothered to find proper replacements...
Now my bike doesn't leak gas.
The overhaul worked *really* well. Now I'll need to get everything properly synchronized and tuned up. Unfortunately, the vacuum tool is 150$ here in Canada... so I'm not out for buying one right away.
I also wanted to mention that the K&N carb kits come with all the o-rings to replace the o-rings in the fuel and air tees between the carbs. I didn't realize that when I started out, and was fairly confused as to where I could purchase the o-rings for the tees.
Francis
ps. The front brake pads were down to the metal on the inside-right caliper. That was pretty aggravating to find out, as I had asked my mechanic if they needed changing at least 4 times last season.
At least now they're in perfect shape & I checked the runout and thickness of everything, and it all looks fine.