
KIBBLEWHITE C674 Valve Guide – Manufacturer Part No: 30-30210
Specifically designed for motocross competition, this C674 bronze valve guide is aimed at quick engine preparation and maintenance operations on 4-stroke engines. Its softer material facilitates boring and allows for precise finishing with Kibblewhite ball hones: ideal for renewing seats and achieving clean valve guidance without heavy machining.
The C674 guides meet the same strict KPMI® tolerances as premium references, while offering lower strength and durability compared to C630 nickel-aluminium bronze guides. They represent a relevant choice for teams and mechanics looking for an easy-to-adjust solution with an electric or battery drill and suitable hones.
Common installation examples: HONDA CRF 450 R (PE05) 2006–2008. This part is designed for riders and technicians working on motocross cylinder heads who want a quick and controlled refurbishment of valve guides.