To all those MT guys looking for more kick; I have had multiple problems with my MT250 in regards to carburation and airbox issues (looking for more HP). The stock breather is woefully small. I've tried drilling holes in the stock airbox and making my own filter element using bulk UNI foam. I have since come up with a performance air-intake system that seems to work with the factory carb or a bigger Mikuni. I had these CAD designed and welded at a prominent shop locally. If you are interested in more info and pictures, shoot me an e-mail.
mailto:joejul@alltel.net