I skipped the extended warranty through Kawasaki and got an extended warranty through my dealer. They seem not worried at all about the upgrades I do to the machine, although they like to ride it.
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Teryx How-To and mountain riding Videos
http://www.youtube.com/UTVMAGE
2008 Teryx LE - Muzzy's Exhaust - Dalton Clutch and OD Cover - FST Std Bore Kit - Dynatek Programmable CDI and Coils - Hunterworks Carb Kit - Walker Evans Shocks - PRP Seats and Crow Harnesses - UNI Filter with HW TPI Valves in Airbox - Bighorns - Unisteer PS - Baja 540C GPS - Coming soon, SDR 4 Seat Cage and Front Bumper