Overhauling the engine? More often than not a set of new piston rings and re-lapping the inlet and exhaust valves will be sufficient to bring the unit back to full performance.
If more work is required then the correct specification components are just a tap, click or swipe away, here at CMS.
Our online schematic/parts list will help you decide which parts to order and how many you will require.
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More power unit components below:
Try this pro-workshop gasket sealant 08CRAHLG120G. It is easy to apply and with excellent results
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?