Yamaha YFZ450R Top End Rebuild Part 2: Rebuild | Partzilla.com

Описание: Your 2009 Yamaha YFZ450R top end rebuild parts are here: http://bit.ly/yamaha-YFZ450R-top-end-...

The top end rebuild on our 2009 Yamaha YFZ450R continues here in part two of our three part series. In this video, we start with the top end torn down and now we’re building it back up. John will show you how to position the piston rings correctly and then connecting the piston.

Once the piston is in place, we’ll install a new cylinder. Our original part was worn, so a new cylinder seemed like the best option. Then, we’ll work up the motor and install the head. That will include setting the cam timing on our YFX450R and getting the chain tensioner in place. Finally, we’ll bolt on the valve cover and replace the spark plug.

Missed part one?    • Yamaha YFZ450R Top End Rebuild Part 1: Eng...  

Ready for part three?    • Yamaha YFZ450R Top End Rebuild Part 3: Ass...  

Check out the playlist:    • Yamaha YFZ450R Top End Rebuild  

VIDEO HIGHLIGHTS:
Positioning piston rings - 3:00
Connecting the piston - 4:20
Installing rings - 5:00
Installing new cylinder - 8:00
Replacing chain guide - 9:40
Installing the head - 10:00
Setting cam timing - 12:00
Installing cams - 12:45
Installing the chain tensioner - 15:00
Installing new valve cover - 16:45
Replacing the spark plug - 18:00

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In the video we’re working with a 2009 Yamaha YFZ450R, but you may have similar steps for your Yamaha ATV. If you’re not sure whether these steps apply to your machine, leave a comment and we’ll get back to you.

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