The reason I ask is because I went riding with my '06 450 in tennessee a couple of weeks ago around the tellico ohv area and most of the trails were rocky. Not just the innocent unobtrusive rounded off or flat rocks that you tend to ignore, but the sharp pointy, stabby kind that will hurt you even if ride over them right. So most of the day was spent in 1st gear trying to go around them with varying degrees of success. There were many spots that keeping your balance and using the clutch was extremly hard to do. Just the act of lifting my fingers off the bar to clutch was enough to throw my balance off and make me stop, stall, or crash. (sometimes all three) When riding some of the harder trails, using my gps, I found that I could go as slow as 6 mph in 1st gear without clutching. That may seem slow but it would have been nice to go about 3-4 mph without having to clutch. I have read about people putting the heavier flywheels on which, among other things, allows you to go slower without stalling or using the clutch. I have not found any hard numbers, only things like "you stall less", or "its great for trails". So how about it, what modification did you do, and how much slower can you go? Real numbers that you have seen with your bike only please.