Here you will find all the gasket packs that we can have for your motocross APRILIA, SX, RXV, RX, ... in 4 strokes. We will propose you as well the packs high engine joint (cylinder) type origin of the same diameter but also the packs joint called big bore which are of a superior cylindric. We propose you only quality products like ATHENA, TECNIUM,... We strongly advise you to change your base and cylinder head gaskets every time you reassemble your engine to avoid any air leakage and therefore engine failure.