I have a suzuki katana LC and im not sure which size i should use as my main jet? My set up is Race crank , high quality seals and bearings , Malossi 70 bore kit, Malossi primary gear up kit , Bmg race manifold , 21mm delorto carb , unrestricted cdi unit , Malossi delta clutch (red springs), Malossi contrast spring , Polini variator 4.9 gram rollers , leo vince tt exhaust Thanks a lot!
Did you fit all the parts yourself? With all the variables of parts, nobody will be able to tell you. I suggest you buy a jet kit and experiment, or go and have a dyno session.
Im running a similar setup and i think the main jet is a 72, cant remember with any certainty, as the above poster said though, you'll really only be able to get it right by expirimenting with a set of them. theres a guide on here somewhere to tell you how to do it yourself.