Cylinder Head – Yamaha YZ250 (1999–2026) / YZ250X (2016–2026) / Fantic XX250 (2021–2026)

The VHM AA33080 cylinder head is designed to elevate performance across a wide range of two-stroke motocross and enduro bikes, specifically the Yamaha YZ250 (1999–2026), YZ250X (2016–2026), and Fantic XX250 (2021–2026). Manufactured from a high-quality alloy and finished in VHM’s signature gold anodising, this cylinder head features an exchangeable combustion chamber system for tuning flexibility. The improved internal water ducting enhances heat dissipation, while the O-ring sealing system ensures durability under race conditions. Depending on the bike model, the correct insert must be chosen to match the engine’s specifications. This system allows riders and tuners to adapt engine characteristics for optimal performance depending on track conditions and riding style. The VHM AA33080 is the ideal upgrade for those seeking more power, better temperature control, and precise engine tuning.

Key Features / Benefits:

• Interchangeable combustion chamber system allows precise tuning for different riding styles and conditions

• Designed to improve engine power output throughout the rev range

• Enhanced water duct layout improves cooling performance and reliability

• CNC-machined from high-strength alloy for long-term durability

• Compatible with Yamaha YZ250 / YZ250X and Fantic XX250 models from 1999 to 2026

Technical Specifications / Specifications:

• Part Number: AA33080

• Application: Yamaha YZ250 (1999–2026), Yamaha YZ250X (2016–2026), Fantic XX250 (2021–2026)

• Compatible Inserts:

  • AE32021-B (YZ250)

  • AE32021-092 (YZ250X)

  • AE32021-K (XX250)

• Material: High-quality CNC-machined alloy

• Features: Exchangeable combustion chambers, improved water duct design, O-ring sealing

• Benefits: Increased engine power, better thermal management, reduced detonation risk