MOTORCYCLE Full KIT 2 + EXHAUSE 2 + SEALS 4 for CFMOTO 300SR 300NK 300CL-X NK300 SR300 NK SR 300 CLX matched Fit For CFMOTO 300SR 300NK 300CL-X single cylinder engine assembly; complete set includes 2 valves 2 valves 4 oil seals for full cylinder head Direct bolt on installation; no or extra needed during engine overhaul; match seat guide assembly temperature body; strong wear resistance under RPM operation to deformation leakage during highway riding elasticity fluororubber oil seals; effectively block from entering combustion chamber to reduce blue lower oil consumption Strict OEM dimensional tolerance control; restore engine compression power output to solve weak acceleration hard start abnormal faults