EX440F is the code carried by the 1979 Exciter 440, and LIT-12618-EX-41 is the part number on its service manual.
One volume covers the generation. Yamaha wrote it for 1976 through 1980 and included the Exciter 340, so both displacements and all five seasons are handled in the same pages. That is worth knowing when you are ordering, because the manual you want is identified by the part number rather than by a single year on the cover.
The procedures are the factory's: general and torque specifications, periodic inspection, engine removal and overhaul, carburation, power train and drive components, chassis and suspension service, and an electrical chapter with wiring diagrams and fault-finding tables. Check that EX440F matches the code on your own sled.
