Yes, you need some sealant. I think Yamabond of some kind but not sure which one. Every year of carb model should be the same. Not sure if the EFI models interchange or not.
2017 YFZ450R XC Setup - OíNeal Racing, Leatt, 4Arm Strong, Engine Ice, ASV Inventions, Ryno Power, ODI Grips, AMSOIL, Sunstar Engineering, Braking, Acerbis Plastics, Kenda Tires, SCOTT, Peak Racing Products, RadicalX
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