Who makes this YZ250F/YZ450F airbox cover?

Pretty sure it's a cycra cover, they come solid tho

Cycra one has holes left and right..

Pretty sure they are just cutting a hole themselves.

not sure why you would want one, the yz sucks enough dirt and shit in as it is...

It is a CYCRA airbox 1000% ! The stock CYCRA airbox has more volume than the OEM one.

Star Racing (And Factory Yamaha Mx2 on Geerts bike) then cut a hole on top of the airbox (such as the photo of craig bike above), it is pretty easy to do by yourself.

And 49weasel, you are mistaking with the CYCRA airbox for the 2014-2018 YZF. The CYCRA for the new generation does not have any hole.

On my side, i went with the NIHILO airbox, here is my set up on my 21 yzf 250:

I just drilled a few holes in my stocker and it’s working pretty well. Doing this with a dremel does look cleaner though.

For reference Cycra Airbox Mods are discussed here.

https://www.vitalmx.com/forums/Moto-Related,20/YZ250F-Intakes,1384154

just buy the slater skins cover, its cheap and it works very well, i have one along with a no toil powerflow intake kit on my 18 450, the difference is staggering. be ready to use ear plugs


https://www.mxpmag.com/new-product-slater-skin-airbox-covers/