Does anyone have a suggestion at to whether the HS 49CC carburator needs to be tweeked for winter 40 degree riding? Today Silverbear and I headed out through the countryside in 44 degree temp. We have to pull a long hill and ususally do so without any trouble. I noticed I didn't seem to have my best top end and SB actually had to pedal. He is pulling Moosh (the MidMaryland 20 MPH Club mascot) behind the bike, but he has never had to pedal to help before. The bikes both run very well and we are hesitant to fiddle much with them. My 2-stroke loves the cold air, but the 4-stroke not so much. Anyone got any ideas? Thanks, Dan