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VHM Cylinder Head Insert blank for SHERCO SE 250, SER 250 2021-2025
€72.90
Tax Included
VHM cylinder head insert for SHERCO SE 250, SER 250 from 2021 to 2025. Each version shows its three key figures: chamber volume, piston height and squish.
The VHM AE32329-A cylinder head insert is designed for SHERCO SE 250, SER 250 from 2021 to 2025. On a VHM cylinder head, the combustion chamber is an interchangeable insert (or dome). Changing the insert changes the chamber volume, and therefore the compression ratio, without modifying the head: you adapt the engine to the fuel, the terrain and your riding.
Key features
- Each version shows its three key figures: chamber volume, piston height and squish.
- Change the compression without machining the head, to suit the fuel and the terrain.
- Part number engraved on the insert.
- Fits VHM cylinder heads only.
Specifications
- Brand: VHM
- Manufacturer part number: AE32329-A
- Engine: 2-stroke
When to change the insert?
- Switch to a different fuel (98 or race fuel with a higher octane rating).
- Engine knocking (pinking) or running hot: compression too high for the fuel.
- You want more torque on tight or sandy terrain.
Change the insert when you change fuel or type of riding, or if the engine pinks. The insert's three dimensions (volume, piston height, squish) must match your engine.
Fitting tips
- The insert is changed with the cylinder head removed.
- Check that the actual height of your piston at top dead centre matches the figure given for the insert.
- Replace the VHM head O-rings every time you take it apart.
- Check the squish with solder wire before riding.
- Tighten the head to the recommended torque, in a criss-cross pattern and in several stages, then fit a new spark plug.
Why VHM?
Since 1995, VHM has been designing racing engine parts for two-strokes: cylinder heads with interchangeable inserts, combustion chamber inserts, crankshafts and connecting rods. A specialist brand, used to fine-tune an engine's power without transforming it.
Spare parts and items to plan
- VHM head O-rings : see the selection
- Spark plug : NGK
- Coolant : MOTUL 1 L · MOTUL 20 L
Frequently asked questions
Will it fit my original cylinder head?
No: VHM inserts only fit VHM cylinder heads.
Which version should I choose?
Choose according to your engine and fuel.
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
SHERCO SE 250 2022
SHERCO SE 250 2021
SHERCO SER 250 2025
SHERCO SER 250 2024
SHERCO SER 250 2023
SHERCO SER 250 2022
SHERCO SER 250 2021
Click on your bike to see all compatible parts.
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VHM cylinder head insert for SHERCO SE 250, SER 250 from 2021 to 2025. Each version shows its three key figures: chamber volume, piston height and squish.
VHM Cylinder Head Insert blank for SHERCO SE 250, SER 250 2021-2025
€72.90
Tax Included