Which insert for what▾
AE32117 inserts for the VHM head AA33090
VHM standard
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 GasGas EC 125 / MC 125 00-11 – C 11.40 cc
SKU: AE32117-C
Insert (combustion chamber)
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Which insert for what▾
AE32117 inserts for the VHM head AA33090
VHM standard
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 AA33090. Chamber volume 11.40 cc. 🔴 The insert fits ONLY the VHM head AA33090 — it cannot be fitted into the OEM head. For the stock (OEM) piston. Compared with the VHM standard (11.60 cc) it has a smaller volume, i.e. higher compression: the engine pulls harder but needs higher-octane fuel, otherwise it may detonate. 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: GasGas EC 125 (2000–2011); GasGas MC 125 (2000–2011).
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