Yamaha YFZ450R Top End Rebuild | Partzilla.com

This is how to rebuild the top end on a Yamaha YFX450R. Find the parts for the whole job right here: http://bit.ly/YFZ450R-top-end-rebuild.

A top end rebuild on an ATV is a big job, and John will take you through it step-by-step.

DISASSEMBLY - 1:58

The plastics have to come off first. Then, we’ll remove the gas tank and the exhaust on our Yamaha ATV. Once we get those parts off, we’ll start tearing the engine down. John will show you how remove the valve cover and find top dead center. Once we do that, we can remove the cam chain, the cams, the head and the piston.

TOP END REBUILD - 12:34

Taking apart the top end is one thing, but rebuilding the top end on our Yamaha ATV takes a little more skill and the right parts. We’ve got new rings, and we’ll show you how to correctly position them on the piston. Then, we’ll connect our piston and set the table to install a new cylinder. After that, we’ll work on getting the head in place along with getting our timing chain on and setting the timing. Once we’re done with that, we’ll get some fire into our Yamaha ATV motor by replacing the spark plug.

PUTTING IT BACK TOGETHER - 30:15

With the top end put back together again, there are a few more thing we need to take care of before we start breaking it in. We’ll show you how to install the airbox on your YFZ450, and then we’ll get the exhaust back on. Our ATV won’t run without gas, so the next step will be to get the fuel tank bolted on and connected. Then, we’ll crank it up to make sure it’s working and get the plastics back on.

Doing the job one bite at a time? Watch our 3-part series on how to rebuild the top end on your Yamaha YFZ450 to see disassembly, the rebuild, and reassembly: https://www.youtube.com/playlist?list=PLazGjIO6R4vThmR2lyP_8SR5bVn-OlqWL

Or see the part of the job you want:

YFZ450R Top End Rebuild PT1: Engine Teardown:
https://youtu.be/58VPULkxxn8

YFZ450R Top End Rebuild PT2: Rebuild:
https://youtu.be/ifwFtmNPkKc

YFZ450R Top End Rebuild PT3: Reassembly:
https://youtu.be/dIJNEhJwC-k

Read more about our top end rebuild project here: https://www.partzilla.com/blog/yamaha/yfz450r/top/end/rebuild?utm_source=titan&utm_medium=blog&utm_campaign=text_link_click

VIDEO HIGHLIGHTS:
Removing plastics - 2:00
Removing the fuel tank - 2:15
Draining fluids - 2:45
Removing exhaust - 3:20
Removing the airbox - 4:00
Disconnecting the radiator - 4:40
Removing the spark plug - 5:20
Removing the valve cover - 6:55
Finding top dead center - 7:30
Removing cam chain and cam - 8:50
Removing the head - 10:15
Removing the cylinder - 11:00
Positioning piston rings- 13:50
Connecting the piston - 15:10
Installing rings 16:22
Installing new cylinder - 18:45
Replacing chain guide - 20:31
Installing the head - 21:00
Setting cam timing - 23:00
Installing cams - 23:45
Installing the chain tensioner- 26:45
Installing new valve cover - 28:30
Replacing the spark plug - 29:45
Connecting the radiator - 30:24
Installing the intake -32:30
Installing the exhaust - 34:00
Installing fuel tank - 35:00
Refilling cooling system - 35:40
First start - 37:00
Installing plastics - 38:30

Find thousands of Yamaha ATV parts here: https://www.partzilla.com/catalog/yamaha/atv?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

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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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Видео Yamaha YFZ450R Top End Rebuild | Partzilla.com канала Partzilla