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70cc steel cylinder kit designed for Honda GK4 models with a smaller combustion chamber. The included piston for 50cc head prevents excessive compression.
Features:Please note: There are also reproduction cylinder heads of this type, which can be identified by the very narrow rocker arms. Among others, the late model Madass features this type of cylinder head. If you are unsure whether your cylinder head is a genuine GK4 type with narrow rocker arms, please contact us for advice.