This is the air box for the 90 moto4 350 This is the one for the 225 The 350 has a indentation not on the 225 like it sits on a brace hose connections look the same but i cant find anywhere that it tells the physical size of either.

This is kind of funny, i dont use Ebay that much so i dont know all the tricks, but i went on yesterday and looked for an air box for your bike, i think it was the first one i sent you a link to, i didnt know that the sellers were aware of everyone that looks at their parts, today i got a special offer, i have 24 hrs to decide if i want it for 28.95 instead of 29.95, i thought that was kind of comical, he offered it to me for 1.00 less. If i act now. Its for the 225 a very good price, if it would work, it comes with the 2 hoses but missing the top. It actually looks the same as the 350 one, but there may be a size differnce, cant really tell, the hoses also look a little different, but they can be manipulated some.