- New
VHM Cylinder Head for YAMAHA YZ 125 1996-2000
€269.90
Tax Included
VHM cylinder head for YAMAHA YZ 125 from 1996 to 2000. Two-piece cylinder head: body and interchangeable combustion chamber insert.
The VHM AA33023 cylinder head is designed for YAMAHA YZ 125 from 1996 to 2000. The cylinder head closes off the top of the cylinder and forms the combustion chamber. On a two-piece VHM head, the chamber is a machined insert that can be swapped in a few minutes to adapt the engine's compression.
Key features
- Two-piece cylinder head: body and interchangeable combustion chamber insert.
- Compression adjustable by swapping the insert, without removing the cylinder.
Specifications
- Brand: VHM
- Manufacturer part number: AA33023
- Engine: 2-stroke
Who is it for?
- Original head damaged by pinking (detonation), cracked or warped.
- You want to match the compression to the fuel, the terrain or a tuned engine.
- You're after a smoother or snappier engine without changing the cylinder.
Good to know
The insert is chosen to suit your engine and your fuel: a smaller chamber volume raises compression, which may call for a higher-octane fuel. Always check the squish when fitting.
Fitting tips
- Clean the cylinder mating face without scratching it.
- Fit new O-rings and grease them lightly so they stay in place.
- Check the squish (gap between piston and head) with solder wire before riding.
- Tighten the head in a criss-cross pattern, in several stages, to the recommended torque.
- Fit a new spark plug and refill the coolant.
Why VHM?
Founded in 1995, VHM specialises in racing engine parts for motocross, road racing and karting. The brand started out with cylinder heads featuring interchangeable combustion chambers, which became its speciality, and then developed crankshafts, connecting rods and gasket kits.
Spare parts and items to plan
- Top-end gasket kit : ATHENA · ATHENA 150
- Spark plug : NGK 3530 · NGK 3230
- Coolant : LIQUI MOLY 1 L · TWIN AIR
Frequently asked questions
Can I change the compression later?
Yes: just swap the VHM insert, without removing the cylinder.
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA YZ 125 2000
YAMAHA YZ 125 1999
YAMAHA YZ 125 1998
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
Click on your bike to see all compatible parts.
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VHM cylinder head for YAMAHA YZ 125 from 1996 to 2000. Two-piece cylinder head: body and interchangeable combustion chamber insert.
VHM Cylinder Head for YAMAHA YZ 125 1996-2000
€269.90
Tax Included