For a mid-nineties KODIAK the book you want is LIT-11616-KD-40. It runs from 1993 to 1998 and includes the ME and NH market KODIAK 4WD as well as the KODIAK 450, with the 1996 machine listed under model code YFM400FWH.
Manuals of this era are thorough about the things that wear out on an old utility quad: shift mechanism, front differential, wheel bearings, brake components and the charging circuit. Each section gives the measurement you take and the limit at which the part is finished.
Because six model years live in one volume, the specification pages note where figures diverge between early and late production. Read the column that matches YFM400FWH rather than the first number on the page.
Wiring diagrams cover the whole harness, which is often what an owner of a quad this age actually needs.
