I have Pentora 250cc racing sport .
here is a list of mods I have done
PWK28 Nibbi carb
Nibbi manifold
Nibbi high-performance air filter
Everbright LED lamps P15D
Nilight ZH084 12" light bar
I am also getting a carb jet kit..20 pc. 10 slow 10 main
The PZ30 carb only allows setting your idle that's it. Bye bye POS30
This is only the start.
next is CDI, coil, chain and sprockets..
Got all off amazon.
I hope this helps you down the long mod road.
Oh . the carb size is 33mm by 44mm. 44mm is the air filter side
Also deleted the PAIR valve