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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
Dyno-Tested Performance ensures proven horsepower and torque gains
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The exclusive heat-treatment of each link creates excellent friction and impact resistance
– 6-month warranty on the complete kit
Stronger than OEM and half the weight
97-04 Yamaha YZ125 YZ 125 54mm Athena RACING Top End Cylinder Kit 14.8:1 Piston 30-30953 Dyno-Tested Performance ensures proven horsepowerUpgrade your YZ125 with the Athena 54mm racing top end kit. High compression 14. 8: 1 piston, gaskets, and OEM fitment for 1997 2004 models. Boost power instantly. 97 04 Yamaha YZ125 Athena 54mm Racing Top End Cylinder Kit 14. 8: 1 Piston Product Description Refresh your engines power with the Athena 54mm Racing Top End Cylinder Kit, engineered to restore and boost performance on all 1997 2004 Yamaha YZ125 models. This complete top end rebuild