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Message: [QUOTE="tsnobaddays, post: 1266312, member: 84707"] I have a questions about the '08 MX dirt bikes like Honda, Kaw., Suz., and Yam. I did some research and all but the Honda have 13.5:1 compression stock. The Honda has 12.9:1 compression does this make a huge differ. in power or does Honda just have it setup this way for reliability. One more quetions is I saw a cover that goes on the Honda that allows you to change the oil filter without having to drain the coolant ,so do you have to drain the coolant to replace the oil filter. Any answer would be great cause the Honda is a canidate for me thanx [/QUOTE]