2021 Yamaha YZ250F Top end (piston and valves) rebuild

Описание к видео 2021 Yamaha YZ250F Top end (piston and valves) rebuild

Doing a routine top end rebuild on a 2021 Yamaha YZ250F with over 100 hours. With Titanium valves, we inspect and make a judgement call to replace them as they were starting to wear thru the coating. Once it gets that far it will eat and destroy the valves. The cam chains also like to stretch and cause all kinds of problems. We've had issues with running aftermarket cam chains stretching faster so we opt in for the OEM.

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