Pinasco 21mm Carburetor Upgrade for 150cc Stella Vespa PX (LML) ScootersThe OEM Keihin PB carburetor is ancient technology, bring your scooter up to speed with Pinasco performance parts. This 21mm carburetor upgrade for the new Stella/LML 4-stroke engines provides increased tuning capability and great performance!Coupled with the new Pinasco exhaust, performance increases of up to 20% can be obtained. Kit includes Dellorto PHBG carburetor and is supplied with all necessary hardware, high-flow drop in air filter, and 88/92/100 main jets.**