Yamaha YZ125 Full Performance Kit

Increase Overall Performance and Power Delivery of your Yamaha YZ125 with the VHM Kit.

Kit Includes:

-VHM High Inertia Crankshaft with a +3mm conrod

-VHM 53.95mm 12 Degree Flat Top Piston 

-VHM Cylinder Head with Special Insert for use with 12 Degree Piston

*Important note
When using our VHM piston, use a small end bearing of 20mm width (ProX 21.3206 or Vertex 8-WB111.

*These kits are made to order, please allow 1 week to ship

VHM Cylinder Head with Special Insert for 12 Degree Piston

The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It's manufactured from a high quality alloy and O-rings are used for the sealing.

Use insert AE32100-

• More engine power
• Better heat transference
• More resistance to detonation
• Exchangeable combustion chambers available

This insert with 11.00cc volume is the VHM standard for Yamaha YZ125 and is developed for the best overall performance. The combustion chamber fits the VHM cylinder head perfectly and is easy to change. The last numbers of the part number are engraved on the insert for indentification.

Use in combination with VHM head AA33077

• Best overall performance
• Quick to adjust
• Good resistance to detonation