2007 Yz250

YamahaGuy-1

New member
Joined
Feb 5, 2007
Messages
43
Location
Pa
My buddy brought over his 07 YZ250 yesterday so we could put it back together (he sent it out to get ported). Everything went smooth until we went to start it. It will fire with a new plug and then dies after about 2-3 seconds, when you pull the plug it has antifreeze on it. We drained the crank and there was no water in the oil. All we can figure is that they didn't give him the correct orings for the head. Any other suggestions out there?
Thanks in advance.
 



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