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VHM Cylinder Head for BETA RR 250, RX 250 2018-2026
€331.90
Tax Included
VHM cylinder head for BETA RR 250, RX 250 from 2018 to 2026. Two-piece cylinder head: body and interchangeable combustion chamber insert.
The VHM AA33183 cylinder head is designed for BETA RR 250, RX 250 from 2018 to 2026. A VHM cylinder head is made up of an aluminium body and an interchangeable insert that forms the combustion chamber. By swapping the insert, you set the engine's compression and character to suit the fuel and the terrain, without modifying the head.
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: AA33183
- 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?
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
- Top-end gasket kit : ATHENA P400060600014 · ATHENA P400060600019
- Spark plug : NGK 3961 · NGK 3035
- 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:
BETA RR 250 2024
BETA RR 250 2023
BETA RR 250 2022
BETA RR 250 2021
BETA RR 250 2020
BETA RR 250 2019
BETA RR 250 2018
BETA RX 250 2026
Click on your bike to see all compatible parts.
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VHM cylinder head for BETA RR 250, RX 250 from 2018 to 2026. Two-piece cylinder head: body and interchangeable combustion chamber insert.
VHM Cylinder Head for BETA RR 250, RX 250 2018-2026
€331.90
Tax Included