250r cool head ??

[ATC-RYDA]

I was interested in purchasing a cool head for my 85 250r , but after looking into them i got a bit confused.. A bunch of these are on ebay listed differently by cc's ?? Not sure what difference this makes .. My 85 is mostly stock other than a fmf pipe and silencer , running on 93 octane pump gas and i'm not sure if it's a stock bore beings i havent had the motor apart.. Can someone give me a little info on what ''cc" i should be looking for .. Also if anyone has any reviems on this product it would be great .... Thanks in advance!

[yj350]

The lower the cc of the dome the higher the cylinder pressure (race fuel). Duncan racing sells heads in 15 - 22 cc's call them and they will work with you to figure out what dome is best for your bike and riding style.