Kibblewhite Top End Kit - White Diamond Valves with Piston - Yamaha YFZ450R
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✓ Fits
Yamaha YFZ450R (2009-2020, 2023-2025). Complete top-end service kit with White Diamond valves and piston.
✓ About This Kit
This Kibblewhite Top End Service Kit includes everything needed for a complete top-end rebuild in one box: White Diamond stainless valves, a racing valve spring kit, a high-performance piston kit, and all the gaskets and seals. It is the one-part answer to a full top-end refresh on your YFZ450R, built around Kibblewhite's proven valvetrain components.
✓ Features
- Everything for a complete top-end service or rebuild in one kit
- White Diamond stainless valves (intake and exhaust)
- Lightweight racing valve spring kit with titanium retainers, dual springs, and H.T. steel base washers
- Springs are suitable for use with high-performance cams
- High-performance piston fully machined from 2618 aluminum with a performance skirt coating
- All necessary gaskets, seals, and O-rings included
- Spring specs: 39 lb seat pressure, 86 lb open pressure, 0.380 inch lift
✓ What's Included
- 2x Intake Standard Outer and 2x Intake Standard Center White Diamond valves
- 2x Exhaust Standard White Diamond valves
- 3x Intake and 2x Exhaust titanium retainers
- 3x Intake and 2x Exhaust CrSi valve springs
- 3x Intake and 2x Exhaust H.T. steel base washers
- 3x Intake and 2x Exhaust Viton seals
- 1x High-performance piston kit (piston, rings, pin, clips)
- 1x Top end gasket kit
IMPORTANT: The piston, rings, valves, and pin clips are designed to work together as a system and are NOT compatible with OEM components. Valve guides are not included. This is a performance rebuild kit for experienced builders or professional installation.
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📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
