I recently purchased a 2003 600 Renegade for my girlfriend to ride. She loves the snowmobile, but complains about the throttle being a bit hard to push. My boss has another Ski-Doo, and his daughter claims the same problem. I am aware of the Thumb wraps out there, but does anyone have any advice for helping ease the throttle a bit? Can you put weaker springs in the carbs? Let me know your thoughts. Thank you in advance.