i have a 04 kawasaki prairie 700 atv, these use a spin on oil filter. the yamaha grizz660, and all polaris 4-stroke atv's use the same part number filter as my quad, i did a little research and found that any filter that will fit a mazda will fit these quads, you can actually find one filter that is approx double the size but will still fit. is there any reason to not use auto filters on a atv? they are about 1/5 the price, plus you have the option of getting a premium filter that supposedly filters better. [email protected]