I have a 09 rmk shift 600 144 with 1.5 in paddles. I ride in MI and need a better gear ratio set up. I can only do about 55-60 on trails and that's all most to the bar and I am using twice as much gas as a buddy's 800 summit, he has changed his gear from a 19 to 23. What should I change mine to? I ride about 50 50 on off trail.