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Youngrasher
11-03-2007, 04:19 PM
I'm having trouble over here in the uk getting a head gasket for my tri-z, i've done some searches on here and some people say that the 1983 yz250k is the same and others say the 1985 yz 250 is the same, can someone who knows for sure tell me the exact year that i need. also is there a difference between the cylinders and gaskets on the 85, 85-1/2, or the 86 tri-z's, thanks guys i'm finding this site a great source for information.

03 ORANGE SHEE
11-03-2007, 09:37 PM
the tri-z head gaskets are all the same metal design at .45 thousands thick,
the aftermarket gaskets like cometic are .60thousands thick and are not metal, i dont know what they are made from.an oem tri-z gasket is now $40!!!!

tecat-z
11-04-2007, 12:19 AM
1983 yz 250 is the only head gasket that is the same bolt pattern as 85-86 tri-z. 84 up yz WILL NOT work! 83 oem's save some cash over oem tri-z and work great. I can give you the part # for it if you like. Personally don't like aftermarket head gaskets. Oem's seem to work better.

Youngrasher
11-04-2007, 09:34 AM
if you could give me the part number that would be great. thanks

Bryan Raffa
11-04-2007, 09:46 AM
oem steel is 38w-11181-00 the 83 gaskit I have dont have a # on the bag..

Bryan Raffa
11-04-2007, 10:00 AM
Yz250k 83 24y-11351-02-00 superceeds 39x11351-02-00
Yz250L 83 39x-11351-00 superceeds 56A-11181-01-00

Bryan Raffa
11-04-2007, 10:04 AM
250k $24.54
250L $26.34
tri z steel $34.06

your better off buying a top end Kit for $28!

No difference in gaskets between all years of Tri z;)

just talked to arron ,, he will ship to you
http://cgi.ebay.com/ebaymotors/YAMAHA-TRI-Z-250-85-86-ENGINE-TOP-END-GASKET-KIT_W0QQcmdZViewItemQQcategoryZ43977QQihZ003QQitem Z130101235924QQrdZ1QQsspagenameZWD1V

These are GOOD I Use Them!

Youngrasher
11-07-2007, 11:56 AM
thanks for the help, thanks to the part numbers i've found what i was looking for,

tecat-z
11-07-2007, 08:46 PM
Use the "K" model. L is 84 and won't work. I have a 84 yz 250 and the head gasket will not fit over the tri-z cylinder studs. Or yeah, just use a complete gasket kit for a tri-z if you wish.

Bryan Raffa
11-07-2007, 08:52 PM
thanks for clarifying that .. no idea why I posted the 84 ..must have stuck in my head when I read your post

tecat-z
11-07-2007, 09:05 PM
You got it brother.:)