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Re: 2012 XT250 ticking sound - Video [Re: JerryH] #151057 04/01/21 01:12 AM
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Organix Offline OP
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Originally Posted by JerryH
Cheapcycleparts.com has the piston, rings, and everything else for the top end 2012 model.

https://www.cheapcycleparts.com/oemparts/a/yam/5004d835f87002275461de3a/crankshaft-piston


I called them earlier, they don’t have it in stock. They are back ordered until May. I went ahead and ordered a wiseco 74mm 9.5:1 compression, just like stock. They show it for MY13 and up.

Re: 2012 XT250 ticking sound - Video [Re: Organix] #151076 04/04/21 12:47 AM
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Organix Offline OP
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So the wiseco piston came in. To my surprise, it looks very different from stock. See pictures [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com].
This is a stock piston from a 2013 XT250 I saw on ebay, looks identical to the 2012 [Linked Image from i.imgur.com]. Anyone got any ideas why the different design in the Wiseco piston. This is the 9.5:1 compression piston just like stock.

Re: 2012 XT250 ticking sound - Video [Re: Organix] #151077 04/04/21 01:53 AM
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Organix Offline OP
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So it wont work. The MY 2013 and up have a bigger piston pin. So the Wiseco is going back. So I cleaned up the old Piston and it looks good to me, see pictures. Do you guys and gals thing I can still reuse this? I will add new piston rings. [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com], [Linked Image from i.imgur.com]

Re: 2012 XT250 ticking sound - Video [Re: Organix] #151078 04/04/21 02:33 AM
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That Wiseco piston looks like the higher compression version to me. That big bump on top would take up a lot more space in the combustion chamber, raising the compression. If it fit at all. It may just be the wrong piston. The original piston does look ok, but I would go ahead and remove the rest of the carbon before reusing it, for three reasons. One, that carbon is thick enough to ever so slightly raise the compression, two, it could act like a glow plug, causing pre ignition, and three, not likely but it could still be hiding something.


The above is my opinion. Your mileage may vary.
1994/2001 custom built XT225 with a ton of aftermarket parts.



Re: 2012 XT250 ticking sound - Video [Re: Organix] #151096 04/07/21 07:58 PM
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Organix Offline OP
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Quick update. Was able to locate an OEM piston. Last night, installed, new piston, rings, pin, retaining c-clips and gasket. Also found a OEM camshaft. Should have had the camshaft on Monday, but USPS strikes again. My package is delayed so no idea when I will get it. Ahh the camshaft is the only thing that I am missing now to put everything back together.

Re: 2012 XT250 ticking sound - Video [Re: Organix] #151097 04/07/21 08:37 PM
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Az4x4 Offline
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You're on track with your engine repair job, and that's gotta be encouraging. Hopefully the camshaft will be there soon and your XT250 will be up and running again. Looking forward to that final report, Organix. Fingers crossed that things go well for you..


The voyage of discovery that truly matters is not in seeking new lands but in seeing with new eyes.
Re: 2012 XT250 ticking sound - Video [Re: Organix] #151098 04/08/21 01:11 PM
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peejman Offline
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Glad you're making progress.


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
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