Staff Answer
Sep 25, 2026 - 07:56 AM
The Iron Maiden cylinder kits are only compatible with the IM70 bottom end. The bottom ends on the IM70 engine kits have a 47mm bore, a 40mm stroke and the long connecting rod is 89mm.
Which rod do I need to run? ZTMOTO IM70 Iron Maiden Bicycle Engine Cylinder Kit
I have two bottom ends i can use.Is it the 38mm or 40mm
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Open Sep 25, 2026 - 11:24 AM
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ZTMOTO IM70 Iron Maiden Bicycle Engine Cylinder Kit
"\u003cp\u003e\nThis ZTMOTO IM70 Iron Maiden top-end cylinder kit is designed as a direct-fit replacement component for the IM70 engine platform. Engineered around the Minarelli vertical architecture, it maintains OEM-matched geometry to ensure proper compression, sealing, and consistent combus...
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