Need help

I have a Gilera runner with a 70cc naraku kit and it runs like shit
the carb is dellorto 17.5 phva
Giannelli shot v4 exhaust i think
stock air filter
do i need to change the carb or something?

 

A bit more info might help ! What's it doing or not ?

 

The Naraku kit isn't much better than stock to be honest.
Make sure the carb is clean, jetted to the kit and pipe.

 

Runs like shit because it's Naraku