PX 80 to 135 (DR Kit) Carb Jetting Advice Needed

I have a PX80 (non autolube) with a DR135 kit and a Sito exhaust.  I'm currently running a 20/20 carb with PX 80 jet spec.  I think I need to change the main jet to between PX125 - 150 which would be either 98/100/102, Slow running jet should be 48 I guess?

Any advice?