Hi all,

My dt250e in my ownership has never had the airfilter guide.  I am currently just using chicken wire to keep the filter from collapsing.  I have  not had much luck finding one for sale.  Any one know where i can source one for a reasonable price? If not maybe some pictures of the oem one with dimensions?

If you are running an original filter (see link below), you could measure the internal dimensions of the filter and add a couple of mm to these, just so the filter stretches over it.

ELEMENT, AIR CLEANER for Yamaha - order at CMSNL

If the airbox is like that on other Yamahas I've seen, there should be a slightly rounded triangle protrusion, which is used to locate the filter cage. You might even be able to measure the internal width of the airbox.

Mind you, I'm not familiar with that model, so the above could be bollox!