Cylinder Head – Suzuki RM125 / RM144 (1996–2008)

The VHM AA33078 cylinder head is developed specifically for the Suzuki RM125 (1996–2008) and RM144 platforms. Renowned for its performance in motocross and enduro applications, this gold-anodized head is manufactured from a high-grade alloy and incorporates an improved water duct layout for superior heat management. The use of O-rings ensures effective sealing under high-performance conditions. What sets the VHM head apart is its modular system with exchangeable combustion chamber inserts, enabling tuners to optimise compression ratios, detonation resistance, and power delivery based on the engine configuration and riding environment. While several insert options are available for the RM125 depending on model year and piston type, the RM144 requires either a custom insert or machining of a blank insert (AE32088-A) for compatibility. Whether you’re racing or rebuilding, the AA33078 offers tangible performance advantages and adaptability.

Key Features / Benefits:

• Exchangeable combustion chamber inserts allow precise tuning of compression and engine behaviour

• Enhanced coolant flow through improved internal water ducts

• Precision CNC-machined from a premium high-strength alloy

• Includes O-ring sealing system for durability and heat resistance

• Perfect for performance builds and competition use

Technical Specifications / Specifications:

• Part Number: AA33078

• Application: Cylinder Head for Suzuki RM125 / RM144 (1996–2008)

• Compatible Inserts for RM125:

  • AE32088-003 (1996–2000, 2003 – Dome piston)

  • AE32088-019 (2001–2002 – Flat top piston)

  • AE32088-F (2004 – Flat top piston)

  • AE32101-E (2005–2008 – Flat top piston)

• Compatible Inserts for RM144:

  • No standard insert available. Use custom insert or machine AE32088-A

• Material: High-quality alloy

• Features: Exchangeable inserts, O-ring sealing, enhanced water ducting

• Benefits: More engine power, better heat dissipation, improved detonation control