Carb jetting

I have a 1966 VNC 150 Super with Sprint exhaust and SI 20/20D carb.
I 've had a new cilinder and the carb installed by a „professional“ shop.
My scoot now only goes 70km/h.
Cilinder is properly broken in (1500km) and the ignition is set right.
I’ve checked the main jet in the carb and i’ts a 95. Isn’t this too small for this setup, to what size can i change?

try a 100

what cylinder was it?

Stock 150 cc 2 port. It was originally a 125cc engine.