Namura Hyperdryve Top End Rebuild Kit for 2016 18 YFM700 YXE700 models 102.97mm NA 40025K 1998 02 Arctic Cat ZR 500 1997 Ski Doo MX Z 583 1997 Ski Doo MX Z 583 Beautifully highlight the transition from cylinder to engine case Product Details Product Line Namura Top End Rebuild Kit Part Number NA 40025K Fitment Type Model Size Specific Fitment Use Type Aftermarket Replacement Unit Sale Qty Style Standard Bore Piston Kit Size Age Group Gender Position Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Material Color Finish Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Overall Seat Width Overall Seat Length Piston Cylinder Size 102 Namura's Top End Kits include everything you need to get your ride operational again