I see people changing the carburetor on Orion engines, and it' a tragedy. The carburetor is very good. I think some people are doing this because of the composite plastic carburetor that used to be on the Sirio engines. The plastic version was hit and miss, but every single one of these new aluminum carbs is spot on. In fact, I would not run any other carburetor on this engine. Adrien and Team Orion spent a lot of time and money to change this carb. It's a very good carburetor, and now it's used on all the LM engines. We've never had a bad one. That's saying a lot when it comes to carbs. This carb is made for the engine, and it's a mistake to change it.