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What year engine is this?

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Could any body tell me what year engine this is? It says G105E-005249

on the top back corner and the guy who i bought it from said it was from a 02 yz 250 but is missing the piston and the easy was to identify them the cylinder. the only reson i dont beleive is because the swing arm bolt wont slide into the engine part, even tried tapping it with a hammer put wont work.

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i dont have the cylinder, i also tried to look up that number on yamaha parts but no luck, i just want to know so i can get the right cylinder and or other parts for it (kinda inportinant)

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The number you posted looks like part of the VIN derivative that is stamped onto the engines. That would be pretty difficult to do a reverse lookup on.

Do you have a few pics of the engine that you have? Are there any other numbers on it?

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it's a 2001, you need to have the rear bushings bored out to fit the 02+ frames.

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I am pretty sure since its a o1 all the enigan parts are the same right (01-02).

I am building the bike from the gound up and i got the low end and the CDI box, the CDI box will work right, and I will start a photo bucket account to post pics of it but 99-02 engine pretty much look all the same

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I am pretty sure since its a o1 all the enigan parts are the same right (01-02).

I am building the bike from the gound up and i got the low end and the CDI box, the CDI box will work right, and I will start a photo bucket account to post pics of it but 99-02 engine pretty much look all the same

see my post above, The 02 I have is G106, and the 01 I have is G105

99-11 are externally the same, except for the swingarm bolt dia, kick shaft, kicker and side cover. (all changed in 02)

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