In warehouse stock

Kibblewhite Valve and Spring Kit — 0.380" Lift — Yamaha YFZ450/R/X | WR450F | YZ450F '03-'09

Kibblewhite · #0926-2739 · Top End / Engine

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valves
Extends the life of the valvetrain and intake components by as much as 4x over the OEM titanium parts
Includes forged one-piece stainless steel intake valves, wound chrome-silicon heat-treated wire valve springs, ultra-light titanium retainers and hardened steel bases
Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary camshaft analysis and spring design software
Specifically designed and engineered for each application

$324.52

In stock. Ships in 2–4 business days · free shipping over $150.

Questions? Call the shop: 801-361-3010

Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014

Description & features6 features

Kit Includes:

• 2x Outer Valves 3.040" Length

• 1x Center Valve 3.00" Length

• 3x Titanium Retainers

• 3x Valves Springs

• 3x Basewahsers

• 3x Red Viton® Seals

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valves
Extends the life of the valvetrain and intake components by as much as 4x over the OEM titanium parts
Includes forged one-piece stainless steel intake valves, wound chrome-silicon heat-treated wire valve springs, ultra-light titanium retainers and hardened steel bases
Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary camshaft analysis and spring design software
Specifically designed and engineered for each application
Made in the USA

Specifications17 specs

Length: 3.040", 3.000"
Stem Diameter: 0.1765", 4.50 mm
Head Diameter: 1.063", 27.00 mm
Riding Style: ATV, Off-Road
Collar Material: Titanium
Spring Lift: 0.380", 0,380"
Spring Open Pressure: 86 lb
Valve Seat Height: 1.105"
Application: Intake
Type: Conversion
Material: White Diamond® Stainless
Tulip Angle: 15°
Units: Kit
Spring Seat Pressure: 39 lb
Shipping weight: 0.5 lb
Package size: 8.8 × 5.4 × 2.3 in
Country of origin: USA

Fitment6 models · Yamaha

Yamaha6 models

WR450F2003–2016
YFZ 450 X 4x22009, 2012, 2018–2020
YFZ4502004–2009
YFZ450R2009–2020, 2023–2025
YFZ450X2010–2011
YZ450F2003–2009

Fitment comes from the distributor’s catalog. Double-check your year, model and trim before you order — or call the counter at 801-361-3010 and we’ll check it with you.

Part numbers

Salto part #: 0926-2739
Kibblewhite part #: 80-80950

Shipping

In stock at a distributor warehouse. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is re-checked with the warehouse before your card is charged.

Questions4 answers

Is it in stock?: Yes — the distributor shows it on a shelf at a regional warehouse right now. We check again the moment you order, before anything is charged.
How fast will it get to me?: Usually 2–4 business days by ground.
Will it fit my machine?: The distributor lists it for the models in the Fitment section above. Not sure about your trim or year? Call the counter at 801-361-3010 and we’ll check it with you.
Is this genuine Kibblewhite?: Yes. It ships new from the same distributors the big online stores buy from — Kibblewhite part #80-80950.