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Feiya Machinery manufactures aftermarket Yamaha motorcycle cylinder heads for global distributors and engine rebuilders. Cast from A356 aluminum alloy with T6 heat treatment and precision CNC machining, our cylinder heads are engineered to match original factory tolerances for valve seats, camshaft journals, and combustion chambers. We support the full range of Yamaha platforms — from single-cylinder YBR125 commuters and YZ250 competition engines to inline-4 YZF-R1 superbikes — with proven batch consistency and zero-leakage performance.
Home > Yamaha Motorcycle Cylinder Heads
Feiya provides flexible manufacturing options to match the specific performance and market requirements of each Yamaha engine platform. The table below outlines our standard capabilities and customization parameters for producing aftermarket Yamaha motorcycle cylinder heads.
Customization Capabilities Table:
| Customization Parameter | Feiya Customization Options & Standards | Suzuki Platform Relevance |
| Casting Material |
A356 Aluminum Alloy (JIS AC4CH / ZL101A). Custom alloy composition available on request. |
A356 provides the thermal fatigue resistance required by high-revving Yamaha engines, from the air-cooled YBR125 to the liquid-cooled YZF-R1. |
| Casting Process |
Low-Pressure Die Casting (LPDC) Gravity Casting |
LPDC is used for complex water-jacketed heads (YZ250F, R-series). Gravity casting suits simpler air-cooled platforms (YBR, TTR). |
| Heat Treatment |
T6 (Solution Treatment + Artificial Aging). Temperature curves recorded per batch. |
Essential for Yamaha competition engines (YZ/YZF series) that sustain extreme thermal loads at sustained high RPM. |
| CNC Machining | 125+ machining centers with 3-axis, 4-axis, and 5-axis capabilities. Tolerances to 0.005mm. | 5-axis machining is used for the multi-angle valve seats on Yamaha 4-valve and 5-valve head designs (Genesis engine architecture). |
| Two-Stroke Support | Dedicated 2-stroke cylinder head casting with squish band geometry control and dome profiling. | Direct support for Yamaha YZ125, YZ250, and PW50/PW80 two-stroke competition and youth platforms. |
| Surface Finish | Shot blasting, sandblasting, powder coating, or custom painting. Diamond-cut fin edges available. | Air-cooled Yamaha heads (YBR, SR) benefit from deep-fin casting with optional diamond-cut contrast finishing for exposed-engine models. |
| Quality Control | CMM dimensional inspection, 100% leak/pressure testing, spectrometer material verification. | Water jacket integrity is verified on every unit — critical for liquid-cooled Yamaha twins (MT-07 CP2) and inline-4s (R1, R6). |
| Assembly Options | Bare head (casting + machining only) or fully assembled (valves, springs, retainers, seals installed). | Bare heads suit engine rebuilders doing custom valve work. Assembled heads provide drop-in convenience for distributors and workshops. |
Feiya manufactures precision aftermarket cylinder heads compatible with a comprehensive range of Yamaha motorcycle and powersports platforms. Whether you need a replacement head for a daily commuter, a high-performance casting for a motocross racer, or a remanufactured unit for a classic restoration project, our casting and CNC machining capabilities ensure a direct bolt-on fit to original Yamaha engine specifications.
Disclaimer: All model names, engine designations, and part numbers listed below (including 2DP-E1181-00, 2BL-E1181-00, and all associated Yamaha identifiers) are registered trademarks of Yamaha Motor Co., Ltd. They are used here strictly for cross-reference and compatibility identification. Feiya is an independent aftermarket manufacturer and is not affiliated with or endorsed by Yamaha.
YZ 125 head
YZ 250 head
The broadest category in Yamaha's lineup. Our single-cylinder heads are engineered for reliable thermal dissipation across both air-cooled and liquid-cooled configurations, from high-volume commuter engines to race-bred motocross platforms.
Commuter & Street:
· Compatible replacement heads for YBR 125, SR 125, RX 100, and the classic XS650 twin.
Scooter & Underbone (Southeast Asia market):
· Aftermarket cylinder heads for Aerox 155, NMAX, Mio i 125, Cygnus, LC135, 125Z, and F1ZR. These platforms represent significant aftermarket volume in ASEAN markets.
Motocross & Competition (2-Stroke):
· High-precision heads for the legendary YZ125 and YZ250 two-stroke race engines. We support squish band geometry control and dome profiling for competition-level compression tuning. VHM-style billet replacement heads also available.
Motocross & Enduro (4-Stroke):
· Replacement and performance heads for YZ250F, YZ450F, YZ250X, YZ400F, YZ426F, WR250F, and WR450. GYTR-specification heads available on request.
Trail & Youth:
· Aftermarket heads for TTR 125, TTR 90, PW50, PW80, YZ80, YZ85, XT225, XT350, and Yamaha DT 125 / DT 175.
Sport & Lightweight:
· Compatible heads for Yamaha R15 V3, R15 V2, and YZF-R125 — popular entry-level sport platforms in Asia and Europe.
Yamaha R3 cylinder head
Yamaha RD350 heads
Manufactured to OEM tolerances to ensure precise valve timing synchronization and balanced combustion across both cylinders.
CP2 Crossplane Twin (689cc):
· Replacement heads compatible with MT-07 / FZ-07, YZF-R7, XSR700, Ténéré 700, and Tracer 7. Yamaha's CP2 engine uses a 270-degree crankshaft that creates unique thermal loading patterns — our casting process accounts for this with optimized water jacket geometry.
Parallel Twin (321cc):
· Compatible heads for MT-03 / YZF-R3 platforms.
V-Twin Cruiser:
· Aftermarket heads for XV250 Virago, XVS650 V-Star / Drag Star, XVS1100, and Bolt 950 (XV950).
Classic Twin:
· Replacement castings for the XS650 air-cooled parallel twin — supporting the vintage restoration market.
MT-09 cylinder head
YZF-R9
Yamaha's inline-3 engine is unique in the industry. Our multi-axis CNC machining handles the asymmetric thermal distribution and triple-port geometry required by these platforms.
MT-09 / FZ-09 / XSR900 (847cc triple):
· The core of Yamaha's middleweight lineup.
Tracer 9 GT:
· Compatible heads for MT-03 / YZF-R3 platforms.
YZF-R9:
· Yamaha's newest supersport triple.
Niken:
· Three-wheeled leaning multi-wheeler using the same CP3 powerplant.
Yamaha R1 cylinder head
Yamaha R15 V3 cylinder head
Designed for high-RPM performance with complex liquid cooling systems and ultra-precise multi-valve CNC machining.
Supersport:
· Precision cylinder heads compatible with YZF-R1 — Yamaha's flagship crossplane inline-4 superbike — and the legendary YZF-R6.
Sport & Naked:
· Replacement heads for FZ6 / FZ6R (599cc inline-4), FZ8 (779cc), FZ1 / FZ1 Fazer (998cc), and the retro XJR1300.
Touring:
· Aftermarket castings for the FJR1300 — Yamaha's inline-4 grand tourer requiring heavy-duty thermal management.
Yamaha warrior 350 head
Yamaha blaster head
· Our aluminum die casting capabilities extend to Yamaha's powersports ATV/UTV product line. These engines share similar casting and machining requirements with motorcycle platforms.
Sport ATV:
· Replacement heads for Raptor 660, Raptor 700, Raptor 350, YFZ 450, Warrior 350, Banshee 350 (2-stroke twin), and Blaster 200.
Utility ATV/UTV:
· Compatible heads for Grizzly 660, Grizzly 700, Rhino 660, Kodiak 400, Big Bear 400, Viking, and Timberwolf 250.
Youth ATV:
· Heads for Raptor 80, Raptor 50, and Badger 80.
Tell us your engine platform, required quantity, and whether you need bare castings or fully assembled heads. Our engineering team will respond within 24 hours with a detailed proposal including material specs, machining tolerances, and lead time.
Get a Quick QuoteYamaha engines are engineered for high-revving performance and precise valve timing. Replicating the original cylinder head to that standard requires strict process control at every stage. Here is how we do it.
Reverse Engineering & Sand Core Design
Low-Pressure & Gravity Casting with A356 Aluminum
T6 Heat Treatment
Multi-Axis CNC Machining
100% Leak Testing & CMM Final Inspection
Over the years, we have provided long-term and stable cylinder head OEM manufacturing services to many motorcycle brands (including listed companies), and have become the largest motorcycle cylinder head manufacturer in Yueqing City, China.
Feiya is a seasoned OEM manufacturer with 17 years of expertise in aluminum die casting. While renowned for our multi-platform motorcycle cylinder heads, our capabilities extend to automotive structural parts and precision fuel dispenser components. We provide complete end-to-end support—from mold development and high/low-pressure die casting to complex CNC machining and rigorous testing—delivering ready-to-assemble solutions for diverse industries.
Operating within a 17,000+ m² facility, Feiya integrates the complete aluminum manufacturing cycle—from in-house mold design and die casting (HPDC & LPDC) to precision CNC machining. Equipped with over 30 advanced casting units and 125+ CNC centers, we maintain an annual capacity exceeding 5,000 tons. This vertical integration allows us to strictly control production timelines and guarantee stable, scalable supply for your critical OEM projects.
Quality is the core of our operations. Feiya is ISO 9001 certified and recognized as a National High-Tech Enterprise and a Technology-Based SME in Zhejiang. We adhere to rigorous quality management systems to monitor every process, from raw material inspection to final tolerance checks. These credentials reflect our commitment to technical innovation and prove our reliability as a trusted partner for global automotive and industrial clients.
For standard models already in mass production, such as YBR125 or YZ250F heads, we offer flexible MOQs suitable for regional distributors. For custom projects requiring new tooling — for example, a modified YZ125 two-stroke head with specific squish band geometry — the MOQ depends on mold complexity. Contact our team with your target model and annual volume for a specific quote.
Yes. We manufacture heads for both engine types. Our four-stroke production covers everything from single-cylinder commuter platforms to inline-4 superbike engines. For two-stroke models like the YZ125 and YZ250, we offer precision-cast heads with controlled dome profiling and squish band geometry to maintain the exact compression characteristics that these competition engines require.
Yes. We routinely reverse-engineer obsolete components for the vintage and restoration market. If you can supply a physical sample — even a damaged one — we can laser-scan it, rebuild the 3D model, and create new casting tooling. We have done this for classic platforms including the XS650, XT350, and RD350.
Bare heads are fully cast and CNC machined but ship without valvetrain components — suitable for engine rebuilders who install their own valves, springs, and retainers. Assembled heads come complete with pre-installed valves, valve springs, retainers, stem seals, and are ready for immediate bolt-on installation. Both options undergo the same 100% leak testing and CMM inspection before shipment.
Yamaha frequently updates port angles, water jacket layouts, and bolt patterns between model year revisions — for example, the YZ250F head changed significantly between the 2003-2005 and 2006-2009 generations. We maintain reference data for multiple model year ranges and verify critical dimensions against OEM specifications using CMM equipment before approving any batch for production.
Yamaha is known for pioneering multi-valve cylinder head designs, from the 4-valve DOHC layout on the YZ250F to the 5-valve Genesis architecture used on earlier FZ and YZF platforms. Replicating these geometries for aftermarket production demands sub-millimeter accuracy. Our engineering team uses optical laser scanning and Hexagon CMM equipment to extract high-resolution point cloud data from OEM Yamaha samples. This allows us to reconstruct exact 3D models of the combustion chamber, intake and exhaust ports, and valve seat angles — ensuring that our replacement heads maintain the same volumetric efficiency and airflow dynamics as the original factory components.
The YZ125 and YZ250 two-stroke cylinder heads require a fundamentally different manufacturing approach from four-stroke heads. Power output on a two-stroke engine is directly governed by the squish band width, dome profile, and compression volume of the cylinder head. A deviation of even 0.1cc in chamber volume can shift the powerband noticeably. Feiya controls these dimensions through precision CNC dome machining and batch-level volume verification. Every two-stroke head is individually measured to ensure that the compression geometry falls within the tight tolerance window required for consistent race-level performance.
Yamaha's crossplane crankshaft technology, featured in the YZF-R1 and adapted into the CP2 twin (MT-07, Ténéré 700), creates an uneven firing order that produces asymmetric thermal loads across the cylinder head. The exhaust-side bridge areas experience significantly higher temperatures than conventional engines. Our casting process addresses this by tightly controlling the directional solidification of the A356 aluminum during low-pressure casting, achieving a fine secondary dendrite arm spacing that improves fatigue strength in high-stress zones. Combined with strict T6 heat treatment charting, this ensures our Yamaha-compatible heads resist deck warping even under sustained high-RPM operation.
