KIBBLEWHITE Valve Guide (ref. 80-80780) — A replacement part dedicated to demanding motocross riders. This exhaust valve guide, made in the USA from C630 bronze, ensures precise guidance of the valve stem while withstanding the extremely high temperatures encountered in motocross. Its composition (approximately 80% copper and 5% nickel) combines thermal conductivity and wear resistance for increased longevity in the critical seat/valve area.
- Application: exhaust (motocross)
- Material: C630 nickel-aluminium bronze
- Outer diameter: 0.4352"
- Inner diameter: 0.2155"
- Origin: made in the USA
The guide profiles are designed to minimize the impact on airflow while maintaining the necessary thickness in areas subjected to high temperatures, contributing to good thermal dissipation and durability of the valve seat over time. Ideal for the refurbishment or preventive maintenance of motocross cylinder heads, it allows for smooth guidance of the stem and limits premature wear.
Common compatibilities: YAMAHA YZ 450 F (B11) 2017, YZ 450 F 60th Anniversary (B11) 2016, YZ 450 F (1SL) 2015. Manufacturer reference: 80-80780.
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