YFZ450 Carb Model Ported +1 Valves Cylinder Head Assembly Assembled Kibblewhite!
Upgrade your Yamaha YFZ450 carb engine with a ported cylinder head featuring Kibblewhite +1 valves and titanium springs for improved airflow and performance.
Yamaha YFZ450 Carb Ported Cylinder Head +1 Valves Kibblewhite Assembled OEM
๐ Product Description
Take your Yamaha YFZ450 carb model to the next level with this fully built ported cylinder head assembly, engineered for serious performance gains. Starting with a Genuine Yamaha OEM cylinder head, this unit has been professionally cleaned, inspected, and sandblasted before undergoing a complete race port and polish process.
Featuring Kibblewhite +1mm stainless steel valves, a titanium valve spring kit, and precision-machined valve seats and guides, this head is built for improved airflow, higher RPM stability, and maximum durability. Ideal for both stock rebuilds and high-performance race engines, this assembly is delivered ready for installation (cams and tappets not included).
๐ฅ Key Features & Benefits
- Full race port and polish on intake, exhaust, and combustion chamber for maximum airflow
- Kibblewhite +1mm White Diamond stainless valves for increased performance and durability
- Kibblewhite titanium valve spring kit for high RPM stability
- Precision valve guide cutting and pocket porting for oversized valves
- OEM Yamaha cylinder head base ensures perfect fitment and reliability
- Fully assembled head (excluding cams and tappets)
- Built for stock or high-performance engines
*IMPORTANT BUILD TIME NOTICE* Most cylinder heads are built to order to ensure the highest quality and precision. While we occasionally have units in stock, availability is not guaranteed. If you need a head for an upcoming race or deadline, please contact us to confirm current inventory. Build times may vary, and on-time delivery for race events cannot be guaranteed.
๐ฆ Product Contents
- OEM Yamaha YFZ450 cylinder head (used, excellent condition)
- Kibblewhite +1mm stainless steel intake valves
- Kibblewhite +1mm stainless steel exhaust valves
- Kibblewhite titanium valve spring kit
- Kibblewhite valve keepers
- Kibblewhite Hi-Temp Red Viton valve stem seals
- Genuine KPMI RED Viton Stem Seals (no bait-and-switch blues!).
- Professionally ported and polished head assembly
โ Compatibility
- Fits all Yamaha YFZ450 Carb Models
- Compatible with OEM part numbers: 5D3-11102-00-00, 5TG-11102-10-00
- Designed for carbureted YFZ450 engines (non fuel-injected)
โ FAQ
- Q: Is this cylinder head ready to install?
A: Yes, it comes fully assembled. However, valve shimming is required and professional installation is recommended.
- Q: Are all components new?
A: The cylinder head is OEM used, but all internal components including valves, springs, and seals are brand new Kibblewhite parts.
- Q: Does this include cams or tappets?
A: No, this listing does not include cams or tappets.
- Q: Is this a stock replacement or performance upgrade?
A: It is both. It works great for stock rebuilds but is optimized for high-performance and racing applications.
- Q: Are these heads in stock?
A: Most units are built to order. Contact us if you need one urgently for race timelines.
๐ Why Buy from BPRATV
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We specialize in high-performance powersports components trusted by riders and builders who demand reliability and results. Every part is carefully selected for precision, durability, and real-world performance. Trust BPRATV to keep your Yamaha YFZ450 ATV running at its best, every single time.
Upgrade your YFZ450 with race-proven ported performance โ order your cylinder head today!
BPRATV - The Best Parts. The Best Performance. The Best Price.
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ยฉ BPRATV LLC
Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations.
This product is exempt from the emission standards and related requirements of 40 C.F.R. ยง1051 as provided by 40 C.F.R. ยง1051.620, and California law. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed-course, nonroad competition/racing.
