Namura Top End Rebuild Kit for 2006 08 Arctic Cat 700 EFI 4X4 Auto 101.97mm NA 30014 BK 2011 Yamaha YFM550FGPH Grizzly FI 4x4 EPS Hunter Edition Product Details Tire Diameter Speed Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Wiseco Top End Rebuild Kit Part Number PK1159 Fitment Type Unit Sale Qty Each Style Material Color Size Finish Position Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Piston Cylinder Size 40 Fitments 2007 Honda CRF450R 97mm 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 101 Namura gives you a higher performance piston without the higher price