Namura Top End Rebuild Kit for 2001 03 Suzuki RM125 53.95mm NX 30004 BK 1999 Harley Davidson FLHTCU Electra Glide Ultra Classic Fitments 2005 Bombardier DS650 Fitments 2005 Bombardier DS650 Product Details Product Line Namura Top End Rebuild Kit Part Number NX 40085 4K Fitment Type Model Size Specific Fitment Use Type Aftermarket Replacement Unit Sale Qty Style Oversized Bore Piston Kit Size 48 95mm 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 53 Namura gives you a higher performance piston without the higher price