How To: O.S. Engine Carb Setting Tips With Adam Drake Trevor Duncan How To, Product News, Video Posts, Video Posts Comments From Mugen: Adam Drake from Mugen Seiki Racing talks about the carburetor settings for the O.S. Speed B2102 engine. O.S. 22C carburetor Visit MugenRacing.com See more posts about Mugen Never miss an issue of RC Car Action! Subscribe today with a Digital Edition subscription or Print + Digital combo!