Up for sale is OUTERWEARS 1989-1990 YZ250WR Yamaha PRE-FILTER NU-3230ST. The vendor part number is 20-1258-01. Please read the title to know what is for sale Dyno and flow bench testing has shown no significant loss of horse power or air intake while using this product Silicone impregnated micro-mesh is water resistant Seams are dielectrically welded Material contains uniform micron sized openings that allow air in, yet filters out the unwanted elements, such as sand, dirt, clay and even water Filters particles as small as .005" in diameter without noticeable air flow restriction
This is an perfect fix to prevent water from entering the throttle body of an FE570 ridden as a Timbersled. In dirt & water the top filter position is handy but in snow it can be a problem. Ice formed on the filter during one ride and never melted and dried before the next. As the engine warms water drops in. The Outerwear prevents this from occurring :)