Yamaha WR426F(P) Owner's Service Manual page 102

MAINTENANCE SPECIFICATIONS (WR400F)
Lubrication chart:
Pressure feed
Splashed scavenge
Transmission gears
Main axle
Drive axle
Item
Cylinder head
Oil filter
Check ball
Oil pump rotor 1
Oil pump rotor 2
Oil strainer
Piston
Piston pin
Crank pin
2 - 27
SPEC
Standard
Oil tank
Camshaft
Valve lifter
Oil pan