Review on NIBBI Racing Performance Motorcycle Carburetor PE28mm 150CC Carburetor: Jets for Honda Yamaha Suzuki Kawasaki Scooter ATV Dirt Bike 150CC-250CC CG GY6 Engine by Dan Hansen

The carburetor is very good. They provided three additional main aircraft and one additional pilot aircraft. What I can't find out is that the pilot jet is the same as the one already in the carburetor (40) and one of the extra lines was the same as in the carburetor (115). It would be better for them to offer other sized add-ons than what came with the carb. The idea is that accessories allow you to tune the carburetor with different jets. 38 or 42 Pilot and 120 or 125 Main would be better. Update: I installed it yesterday and it's a VERY good carburetor. I was able to use the standard 40 pilot (although I may need a size smaller. The pilot screw is a little less than 1 1/4 turns) and the additional 118 that is provided. The bike works better than ever.