VHM Cylinder Head Insert for TM RACING EN 125, MX 125 1998-2011

VHM offers this cylinder head insert for TM RACING EN 125, MX 125 1998-2011. On a two-piece head, the insert (the "dome") forms the combustion chamber. Its volume and shape set the compression and the character of the engine.

Why change the insert?

The benefits:

• Match the compression to your riding and your fuel without replacing the whole head.
• A part machined from solid, to precise dimensions.
• Replace an insert marked or damaged by detonation.

When should you change the insert?

Signs of detonation, leaking O-rings or the wish to change the compression: the insert can be swapped in minutes, with new O-rings.

Specifications and fitting tips

• Manufacturer part numbers: AE32017-O (Version O (10.80 cc)), AE32017-N (Version N (11 cc)), AE32017-M (Version M (11.20 cc)), AE32017-L (Version L (11.40 cc))

Available in several combustion-chamber volumes: a smaller volume raises compression (more punch, quality fuel essential), a larger one lowers it (smoother engine).

Cross-Mania tip: Fit new O-rings, tighten in a cross pattern to the specified torque and, with a higher-compression insert, use high-octane fuel.

Spare parts and items to plan

• VHM head O-rings : VHM SK33000.VITON · VHM SK33000
• Coolant : TWIN AIR 1 L · MOTUL 1 L

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
TM RACING EN 125 2011
TM RACING EN 125 2010
TM RACING EN 125 2009
TM RACING EN 125 2008
TM RACING EN 125 2007
TM RACING EN 125 2006
TM RACING EN 125 2005
TM RACING EN 125 2004
TM RACING EN 125 2003
TM RACING EN 125 2002
TM RACING EN 125 2001
TM RACING EN 125 2000
TM RACING EN 125 1999
TM RACING EN 125 1998
TM RACING MX 125 2011
TM RACING MX 125 2010
TM RACING MX 125 2009
TM RACING MX 125 2008
TM RACING MX 125 2007
TM RACING MX 125 2006
TM RACING MX 125 2005
TM RACING MX 125 2004
TM RACING MX 125 2003
TM RACING MX 125 2002
TM RACING MX 125 2001
TM RACING MX 125 2000
TM RACING MX 125 1999
TM RACING MX 125 1998