The idle jet on the 32/36's are easy to get to. They are located on the side, there is a brass cover screw/holder covering the jet. Identify what you have currently installed. At a guess im going with 55 /60 being stamped on the jet. 40 /45 is probably more in the zone. An air /fuel ratio gauge would be the only real way of knowing if the mixture is on the money. U-ego make a cool digital one which uses a bosch wide band o2 sensor that needs to fitted to your exhaust, or pay for some dyno time. Maybe you mechanic has a gas analyser.