VHM 21.00 +3.00 1.50 Cylinder head domeYAMAHA 250 YZ 250 - 1988 - 1998Ref : VHM0411 / VHMAE32300-F

This insert has a higher volume and a lower compression ratio, which translates into better overspeeding characteristics and a higher top speed. However, bear in mind that this compromises power response at low revs. The combustion chamber fits perfectly into the VHM cylinder head and is easy to replace. The last digits of the reference number are engraved on the insert for easy identification.

• Higher up
• Ideal for hard floors
• Quick adjustment