Moose Offroad Hard-Parts – Top End Gasket Kit (manufacturer part number: 810670MSE): a complete kit designed for the refurbishment of the top end for motocross bikes. Designed to replace all the gaskets needed during an engine intervention, it includes valve stem seals, cylinder head gasket, base gasket, exhaust gasket, O-rings, sealing rings, and other essential sealing components for reassembly.
- Type: top end kit — complete unit for overhaul
- Usage: motocross / off-road, suitable for track sessions and workshop maintenance
- High compression kit available: base gaskets of 0.012" to increase compression without requiring high-compression pistons or cylinder head machining
- Manufacturing: gaskets made in the USA
- Note: moulded rubber valve cover gasket not included
This kit offers an economical solution to restore the top end and achieve reliable sealing after disassembly. Ideal for amateur mechanics as well as riders who maintain their YZ 250 (2015–2019 models mentioned among common applications). Use this kit for clean and precise reassembly, ensuring to check clearances and mating surfaces during installation.
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