VHM Insert Yamaha YZ250 1999 - 2024 / Fantic XX250 2021 - 2024 (21.00cc)

This insert has a higer volume / lower compression ratio, meaning better overrevolution characteristics and more top speed. However, keep in mind that this compromises bottom power reaction. 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 identification.

Use in combination with VHM head AA33080

More top
Best for hard ground/enduro
Good resistance to detonation
This insert does not fit into an OEM head, only a VHM cylinder head.


Specifications
Part number
AE32021-009
Type
Optional
Volume [cc]
21.00
Piston height [mm]
+2.80
Squish [mm]
1.50
Piston crown shape
Dome
Bore
Ø66.40
Applications
Application
Make
Model
Year
Motocross
Yamaha
YZ250
1999-2024
Motocross
Fantic
XX250
2021-2024
Motocross
Yamaha
YZ250X
2016-2022