2003 Kawasaki KLF250 Service Manual., Page 22Get this manual
2-6 PERIODIC MAINTENANCE Specifications
Item Fuel System Throttle Lever Free Play Idle Speed Air Cleaner Element Oil Engine Top End Valve Clearance: Exhaust Inlet Engine Lubrication System Engine Oil: Type Viscosity Capacity Standard mm (0.08 0.12 in 300 400 rmin (rpm) High-quality foam air filter oil Service Limit
0.18 0.23 mm (0.0071 0.0091 in 0.15 0.20 mm (0.0059 0.0079 in
API SF or SG API SH or SJ with JASO MA SAE10W40 2.0 (2.11 US qt) (When filter is not removed) 2.1 (2.22 US qt) (When filter is removed) 2.75 (2.91 US qt) (When engine is completely dry)