I'm not sure how much help this is, but the dealer where I bought my V says maintanance thru about 18k-19k miles (done according to the book) through them costs about $1700 parts and labor. They sell a prepaid maintanance agreement for about $680 for the same 18K-19K miles, saving a person about a grand. They are a certified Kawasaki shop, and I'm sure there are other prices and prepaid deals out there so take that for what it's worth.
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