This will get you in the ballpark assuming you have a stock motor and are using stock air filter.... 142.5 mikuni main. Needles on middle clip (if you have aftermarket needles) or use 1 shim on the stock needles. 3 turns out from fully in on the a/f screw.
The 142.5 will work, but unless you're at sea level a 140 or even a 137.5 will probably be a bit better. A 17.5 pilot smoothes out the off/on throttle abruptness a touch.
