I just bought a 2008 Sportster xl1200c. When I ride like in 1st 2nd 3rd gear.. like at 40 km/h constant the bike feel like he wants to go faster ... I dont know if you guys will understand.. like is trying to go forward even if I want to stay a speed limit. Do i shift up to fast like i'm not in the right gear ? at which speed do I need to shift on a sportster ? like from 0 to 20 km/h i shift up the 2nd 20-40 km/h the 3rd. PLEASE HELP