2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 184Get this manual
CRANKCASE
CRANKCASE INSPECTION 1.Thoroughly wash the case halves in mild solvent2.Clean all the gasket mating surfaces and crankcase mating surfaces thoroughly3.Inspect: Crankcase Cracksdamage ReplaceOil delivery passages Clogged Blow out with compressed airBEARINGS AND OIL SEALS INSPECTION 1.Inspect: Bearing Clean and lubricate, then rotate the inner race with fingerRoughness Replace2.Inspect: Oil seals Damagewear ReplaceCRANKCASE ASSEMBLY 1.Apply: Sealant (Quick Gasket(to the mating surfaces of both case halves) Sealant (Quick Gasket): PNACC-11001-05-01 Yamaha bond No1215: PN90890-85505 2.Install: Dowel pin 2