Does a 2007 yz 125 have a center gasket?

I just bought a used bike and after 4 days of riding my piston is literally in pieces, my cylinder is still in great condition and all of my bearings are good but some of the pieces ended up in the bottom end and before I split it I was wondering if it had a center gasket?

Yes

How did the piston shatter and the cylinder in great condition?

Not sure about other model years but the 2005-2016 engine should not have a center case gasket but rather use a bead of Yamabond sealant.

 

(As per the 2010 service manual)

Nope.

Yamabond or my favorite...1211.

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Send a pic of the cylinder. I assure you the cylinder is at least a wee bit scratched. Haha But hey, maybe you just got lucky.

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