I just bought this bike and it seemed fine on the test drive but now that I'm trying to use it for what I bought it for at home it's trying to kill me. There is an enduro race that cross's my property and I want to run it next year. The course is mostly trees, rocks, mud and not much open space. I need more forgiving low end. Flywheel weights were available through Terry Cable but are not any more. Anyone know who to contact or what can be done? This is why I opted for the WR not the YZ.