PWK OKO 30mm Flat pumps up the response at first twist of the throttle adding that little bit of torque you get with better air flow.
Simple carb with manual choke that can be modified for cable choke lever. Throttle cable is single.
Stock main jet is 138 so most will be coming down for the Tha Heist or another Cleveland Cyclewerks 250 bike.
OKO carbs can be used on four stroke engines as well as two stroke with great results.
An intake will also be needed if your carb mount is bolt on and not spigot mount. Those from Mikuni , SPI and Stage6 work well.
30mm is stock size of a Cleveland Cyclewerks Motorcycles with 32mm for the more adventurous of us.
The 90 Degree air intake offered here is what was used to get things in order and stable for air flow, seems yo have done the trick along with smaller main jet.
Jets that come in carb are rather larger for the Cleveland bikes, you can let us know what main jet size you would like and it will be included.