Forged 31mm crankshaft with +5mm length rod for Zenoah and CY 22.5-30.5cc RC engines. This is for experienced engine builders and is NOT a bolt in modification. At this time, we do not have have any spacers or kits to make this a bolt in mod. You will need to understand how to use this to be able to build an engine with it.
Inventory is limited to supply on hand. We do not make this in-house and it is a limited availability item. Our next shipment is due sometime in May-June.