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70cc aluminium cylinder kit designed for Honda GK4 models with a smaller combustion chamber. The included piston prevents excessive compression.
Features:Please note: There are also reproduction engine blocks fitted with this type of Honda GK4 cylinder head, which can be identified by the very narrow rocker arms. Among others, the late model Madass features this cylinder head type. If you are unsure whether your cylinder head is a genuine GK4 type with narrow rocker arms, please contact us for advice.