



KIBBLEWHITE valve guide (manufacturer part number 40-40320) designed for motocross engines. Machined in the USA from nickel-aluminium bronze C63000, this guide combines wear resistance and excellent thermal conductivity to ensure sustained performance on demanding terrains. Ideal for riders who are refurbishing their engine after a season of intensive riding.
Fitting suitable for motocross machines, including several generations of KAWASAKI KX 450 F (KX450D) 2006–2008. This valve guide provides the necessary seating precision for the proper functioning of the seats and the longevity of the valves, reducing premature wear in the combustion chamber. Robust replacement part for engine maintenance, reboring, or restoration after intensive use.