Raptor top end rebuild........
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I am going to start the top end rebuild of my 2002 Raptor this week and I was hoping to get some advice. First of all; when I take the top end apart, is there anything I should know? Any tips or tricks? My 440ex had an extremely simple top end and I could take it apart and put it back together in under 45 minutes but I'm sure the Raptor is a lot more complicated. Second; I am getting a noise from the top end like somethings hitting and it sounds too heavy to be a valve adjustment problem; more like a cam chain slap. Bad tensioner? Also, it burns a lot of oil and it seems to be low on power so I think getting the cylinder bored and an oversize piston will be on the agenda. How much are the big bore kits and which one should I go with? Any help would be greatly appreciated. Thanks
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