2003 Kawasaki KLF250 Service Manual., Page 123Get this manual
ENGINE LUBRICATION SYSTEM 7-7 Engine Oil and Oil Filter
Bypass Valve Installation
the bypass Dropmounting pinvalve piston closed end [A] first into the filter [B]Put the spring [C] into the mounting pin and compress it beyond the small hole Drive the retaining pin [D] into the small hole to hold the spring Install the oil filter (see Oil Filter Installation)
Bypass Valve Cleaning and Inspection
Clean the bypass valve parts in high-flash point solventWARNING
Clean the parts in well-ventilated area, and take care that there is no spark or flame anywhere near the working areaBecause of the danger of highly flammable liquids, do not use gasoline or low-flash point solventsbypass valve parts Visually inspect the or distorted, replace itIf the piston is If the spring is bent worn, replace all of the bypass valve parts