PISTON KIT NAMURA HONDA CR250R 97-01 HUSQVARNA CR250 98-13 66.34Namura Piston Kit Honda CR250R 97 01 Husqvarna CR250 98 13 66. 34 Features: Machined smooth piston crown to reflect combustion heat while reducing carbon buildup Hard anodized piston crown with a hardness of HRB 105 MOS2 coating to draw heat through piston walls and out the bottom Minimized piston expansion and contraction Pistons are more resistant to wear and scuffing, expand less with heat and are stronger Higher Performance piston without a higher