Piston: WO8250DA - WOSSNER PISTON KTM EXC300 08-16 HUSQ TE300 14-16 71.94MM. Little End Bearing: WON1020 - WOSSNER NEEDLE BEARING 18X22X19.8. All Wossner pistons are forged in-house from aluminum. Forging gives the alloy a better grain flow, which in turns creates more tensile strength, or the ability to bend without breaking.