Well I have a solid 3 years of street riding and ice racing (~25 000km) on my 06 450. I've decided it would be best to replace some things before they let go. Namely the crank and valves. I have my eye on a complete wiseco crank kit and a set of kibblewhite ss valves. The piston was replaced last fall. Are there any high wear items I should replace while I have the cases apart? Any suggestions would be really helpful.