Which insert for what▾
AE32021 inserts for the VHM head AA33080
Fantic XX250 '21-27 VHM standard: XX250
Fantic XX250 '21-27
YZ250 '99-27
YZ250 '99-27
YZ250 '99-27 VHM standard: YZ250
In general: smaller volume = higher compression = more pull but better fuel needed; larger volume = lower compression, the engine revs out more freely and tolerates pump fuel. If in doubt, take the standard.
Based on the VHM manufacturer charts.
VHM head insert Yamaha YZ 250 99-27 / YZ 250 X 16-27 / Fantic XX 250 21-27 – B 20.60 cc
SKU: AE32021-B
Insert (combustion chamber)
Price incl. VAT (23%)
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Which insert for what▾
AE32021 inserts for the VHM head AA33080
Fantic XX250 '21-27 VHM standard: XX250
Fantic XX250 '21-27
YZ250 '99-27
YZ250 '99-27
YZ250 '99-27 VHM standard: YZ250
In general: smaller volume = higher compression = more pull but better fuel needed; larger volume = lower compression, the engine revs out more freely and tolerates pump fuel. If in doubt, take the standard.
Based on the VHM manufacturer charts.
Exchangeable combustion chamber (insert) for the VHM cylinder head AA33080. Chamber volume 20.60 cc. 🔴 The insert fits ONLY the VHM head AA33080 — it cannot be fitted into the OEM head. For the stock (OEM) piston. This is the VHM standard insert for this head — the default choice if you are not sure which one to pick. Quick to change — the insert simply sits in the head and seals with O-rings. The last characters of the part number are engraved on the insert, so you cannot mix them up. Fits: Yamaha YZ 250 (1999–2027); Yamaha YZ 250 X (2016–2027); Fantic XX 250 (2021–2027).
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