2002-2011 Honda TRX 250 Fourtrax Recon ES/TE/TM ATV Engine Piston Ring Kit [Bore Size (mm): 68.45 (Stock)] Bore Size (mm): 68.45 Ring Kits Include Piston Rings Only - Piston Not Included Namura Piston Rings Fit Both Namura and OEM Pistons of the Same Bore Size Unless Otherwise Specified Compatibility: 2002-2011 Honda TRX 250 Fourtrax Recon ES/TE/TM