Engine rebuilds usually involve just a replacement set of piston rings, lapping in the valve seats, new valve springs and a new cam-chain.
If your engine requires more remedial work, perhaps replacement valves and valve springs for example, our online schematic/parts list will help you decide which parts to order and how many you will require.
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More engine related, specifically oil pump and crankcase components, mechanical and cosmetic, below:
Add as many items as you wish to the same shopping cart, new gaskets 9043010171 9043006817 9043006817 and seals 93210548A1 9321032172 9321014800 9321019800 for example, and still only pay the same single fixed price shipping cost. Pro-workshop gasket sealant: 08C70K0234M - highly recommended! Please be aware that this component may have other applications within the Yamaha model range so make sure the part number you order is correct for your model?