ok, I'm looking at a few different CBR F2s right now, one thats a bit of a basket case, needs a carb synch, and some minor stuff cosmetically to be street ridable. what I need to ask, is how hard is it to do a carb synch on the F2. I've never done one before on any bike, other than my EX500, which really wasnt terribly hard. but how would I synch the carbs on this model? I know a manomometer I think it is, is necessary to measure vacuum pressure from each carb, but I dont know anything beyond that on this particular bike.

 

To do a tune-up correctly on a F2, the carb synch is the last thing you should do. First thing is oil, then air filter, plugs, and valve clearance. What good is synching the carbs if everything else is out of whack??
Anyway, The hardest one to do is the valve clearance... all the others, including synching the carbs, are easy.
You'll need a carb synch tool, a lawnmower fuel tank, a screw driver, and a box fan. Remove the gas tank carefully, being careful to mark which fuel lines connect to which fittings on the fuel valve (obviously turn the valve to the "off" position before removing the tank.
Then connect your aux fuel tank to the bike, making sure that it is high enough that gravity will be able to feed fuel to the carbs.
Now connect the synch tool to the carbs. The setup will depend on how many ports your synch has. Some only have 2 gauges, some have four. Your "zero" carb is the #2 carb (second from the left). The ones you want to adjust use the adjustment screw on the top of the carb. Get the other three as close to the #2 carb as possible at idle speed.
You should be using your boc fan to keep the motor cool when doing this.
After they are in synch at idle, you should adjust them again at a higher RPM.