I just recently bought a 2006 f7. It's the end of the season so I'm going to spend my summer getting in shape for next year. The sled has 2300 miles on it. Does anyone know how long the clutches usually last? I don't ride trails often in SD, it's mostly ditch-bangin and fields. Is it worth it to just have a new primary put in before season or should it still have quite a few miles left in it? Any help is greatly appreciated!