what head is this on my 250r engine?

[200x Basket]

I bought a trx250r today and it has this head on it. anyone got any idea what it is from?

thanks

[Marty]

I believe that is a cr 250 motorcycle head!!!

[200x Basket]

that was my 1st thought but I cant find one that looks like that.

[atc500x]

Not sure it's a honda head,but been modified,shaved around plug hole and nut hole to fit. Cast number was where it been grinded.But it's not a CR 250 head ,there is no engine mount on it......I can't remember seeing a head without a mount on it.....

[200x Basket]

the grinding looks like it ground out a custom name. i could see a "S" and a "K"

[Red Rider]

It looks like the same head as is in this ebay auction, and the ground out custom name looks like it might have said "FTZ."

http://www.ebay.com/itm/CR250R-CR-250R-FTZ-Racing-Ported-Powervalve-Cylinder-Head-Assembly-386-TRX-/321398696891?pt=Motors_ATV_Parts_Accessories&hash=item4ad4daebbb&vxp=mtr#ht_82wt_963

What do I win if I've solved the mystery?

[200x Basket]

AWESOME!!

you have my gratitude!!!

[Red Rider]

Sweet! I'm glad I could help.