I run the 35mm CV2 really like it. It provides easy jetting (under 2 minutes for the main), thumb throttle feels like a Blaster so no more sore thumb, and the best part is they run great. Sredish is the man to talk to about this but he just sold his shee and has switched to the darkside (Honda) so he might not check in here as much as he used to. Singles are good for woods and tracks if you dune then stay with the duals. In my opinion definitely worth the money for my style of riding, farmland, woods and general dicking around beating up on Polarises.