There are two oil filter screens in the xr4 i believe. One at the bottom of the frame and one somewhere in the bottom end. How often do yo you guys clean/replace them. The last guy that owned my bike ran 10w-30 HRC oil in it. my bike has done 4719km since new and i don't know if it has been done before. Thanks PS Looking for a good sticker kit for my 03 xr400r any sujestions cant find many on ebay.