2018 YZ 65 BOTTOM AND TOP END REBUILD NEED HELP!!

chris446003
Posts
5
Joined
3/30/2020
Location
East Haven, CT, USA
Edited Date/Time 3/31/2020 10:09am
I’m an amateur mechanic who’s doing his first rebuild on a 2018 yz 65. The bike just fell into my hands
One day the bike just seized up and I decided to do a full rebuild, I replaced seals bearings the camshaft piston rings and gaskets. I’m going to close up my case and boom I find this piece I have no idea where it goes. I’ve looked at tons of diagrams, and I’ve even spoken with my local Yamaha dealer bringing the piece to them to see if they could figure it out and the best they got back to me with was asking me if it got mixed in with some other parts. I WANNA KNOW IF ANY OF YOU OUT THERE KNOW WHAT THIS IS ON THIS BIKE SOMEONE help me plz!
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mwmx54
Posts
30
Joined
1/31/2020
Location
Pleasant Grove, UT, USA
3/30/2020 10:35pm
Does it go somewhere in the exhaust? It looks like it has some carbon buildup.. or something in the powervalve?
Side note, what cam did you put in there? Haha, just a joke, I’m guessing you meant crankshaft..
chris446003
Posts
5
Joined
3/30/2020
Location
East Haven, CT, USA
3/31/2020 3:40am Edited Date/Time 3/31/2020 3:41am
mwmx54 wrote:
Does it go somewhere in the exhaust? It looks like it has some carbon buildup.. or something in the powervalve? Side note, what cam did you...
Does it go somewhere in the exhaust? It looks like it has some carbon buildup.. or something in the powervalve?
Side note, what cam did you put in there? Haha, just a joke, I’m guessing you meant crankshaft..
I have no idea i had it with all the pieces to the clutch and the right side of the crank. Yeah I meant crank lol I typed it up fast
Didn’t wanna put it together without at least trying to figure out what it was
Dixon893
Posts
58
Joined
12/8/2017
Location
Bay City, MI, USA
3/31/2020 9:16am
I just pulled apart my boys 19 YZ85 same motor. Ill look for something like that, it looks like exhaust carbon on the end.

The Shop

chris446003
Posts
5
Joined
3/30/2020
Location
East Haven, CT, USA
3/31/2020 10:09am
Dixon893 wrote:
I just pulled apart my boys 19 YZ85 same motor. Ill look for something like that, it looks like exhaust carbon on the end.
Thank u much appreciated!
Helda3
Posts
85
Joined
2/20/2020
Location
AU
4/2/2020 2:08am
Camshaft piston rings?
1

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