Factory Shaved Cylinder or Someones Dremel Work?

[Rustytinhorn]

Its of a liquid 250r.
Is this work oem from the factory, or did someone shave this cylinder. Looks like a dremel tool was taken to it to me. The ports look almost untouched, but the bottom end looks worked on. Is that how all factory cylinders come?
Any insight would be great, as I havent ever seen a port and polish job before.

http://i242.photobucket.com/albums/ff54/rustytinhorn/100_5222.jpg

http://i242.photobucket.com/albums/ff54/rustytinhorn/100_5220.jpg

http://i242.photobucket.com/albums/ff54/rustytinhorn/100_5218.jpg

[GPracer2500]

Someone's been in there. Doesn't look like they did much of anything though.

Here's an untouched 86' TRX:
http://i34.photobucket.com/albums/d133/gpracer2500/P4040060Large.jpg

Here's an 85 ATC with some work:
http://i34.photobucket.com/albums/d133/gpracer2500/P9110087Large.jpg

http://i34.photobucket.com/albums/d133/gpracer2500/P9110091Large.jpg

http://i34.photobucket.com/albums/d133/gpracer2500/P9110094Large.jpg

http://i34.photobucket.com/albums/d133/gpracer2500/P9120105Large.jpg

[Rustytinhorn]

Thanks for the pics. I can definitally see the difference between mine and the mod 85 intake port size. Big difference. As far as the bottom end goes, mine looks just like the modded one with the exception of those little fins. Yours have been shaved down a lot skinnier than mine. I supposed for easier air flow.

Does anyone have a pic of a stock bottom end?