50cc Bike Engine Kit ATHENA 400210600520 P400210600520 Top-End Gasket Kit Top End Gasket Ki Top End Gasket Kit Purpose Of Steering Stabilizer Meet or Exceeds OEM specification. Top end - Page 4 of 18 - JK Moto State of the art quality. Chosen by the top race teams in all forms of racing including super cross, motocross, GNCC, superbike, and more Athena is OEM of most motorcycle manufacturers. Engineereed specifically for Yamaha dirt bikes to be resistant to impact and fatigue Part number:P400485600267; Product number:AT0000.5241; Fits to: Athena. $36.37. Add to cart. Add to watch list...