I have an '02 426 an ride mostly woods. Gearing and flywheel are stock. I am considering altering the gearing to 13 up front and keeping 49 out back. I have read from some of you that you like a 13-51...thoughts? Also I'd like to give it a heavier flywheel, but not sure how much heavier. I live in Colorado, ride mostly on technical trails, and the occasional desert trip. Anyone out there have any suggestions. I was thinking 10oz, but not sure what sort of a difference that will make, should I go bigger? Love to hear what you guys are running and your thoughts.