TITANIUM EXHAUST VALVE (2X) YAMAHA YZ 450F 03-09, WR 450F 03-, YFZ 450 04-

our forged in one piece for extra strength. Use of special Ti3Al for better material properties under high temperatures. CrN coating for extra hardness and less friction between valves and guides. Greater durability than OEM Titanium Valves.

Installation instruction: 1.Do not touch the valve surface with your bare hands, use gloves or pre lube the valve with engine oil, these precautionary measures will reduce the risk of corroding the coating. 2.Never use a lapping compound on a new valve, take a dummy valve to do this ding operation. 3.Please take notice; during every rebuild the valvmaking the seat free from the hardened shell. The width of the contact zone on a valve seat with the valve face should be at least 1mm. In general the angle is 45°, however consult the O.E.M. specification first. 4.New valve seats should be soft, material as Nodular Iron, Bronze, or Beryllium- Copper, all heat treated to Rockwell, RC32 or less. Most of the original valve seats used in combination with titanium valves are made of such an alloy. use, however, obliges the manufacturer to make the following disclaimer: The entire risk as to quality and performance is with the buyer.