1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 83Get this manual
LUBIRICATION SYSTEM Align the fan motor groove with the fan motor shaft then install t, cooling fanh
App ly locking a.gent to the cooling fan mot,onut threadsInsta ll and tighten the fan nut
Insta ll cooling fan cover Clnd tighten th'e screws