Suzuki King Quad 400 LT-A400 2003-2012 Service Manual

An ATV.com owner's own review sums up the KingQuad 400's genuine appeal in one honest line: "this is basically a Suzuki Eiger with a new body. And that is not a bad thing. It has a simple and reliable design." That same owner's real-world testing across "a couple hundred acres in Missouri" and multi-day rides through Colorado's Taylor Park at altitude found the machine genuinely dependable — "I love the air cooled engine (one less part to breakdown or freeze) and the thing sips fuel... the fuel injection alleviates the need for carb adjustments at altitude."

Power comes from a 376cc air-cooled single-cylinder four-stroke engine — early carbureted models giving way to fuel injection (the "ASi" and "FSi" trim naming) as this production run matured. Autoevolution's own model breakdown of the later fuel-injected years describes "a dependable fuel-injection engine and brawny character" wrapped in "this compact-chassis machine," genuinely well suited to both outdoor chores and recreational trail riding. Power runs through Suzuki's CVT-style automatic transmission on the ASi trims (one owner review noting genuine initial skepticism about the CVT before becoming a convert — "it would be hard to go back to a gear shift now") or a semi-automatic setup on FSi models, where gears are user-selected but shifted through an electrically-controlled assembly that minimizes power loss between changes.

Selectable 2WD/4WD driveline modes pair with a torque-sensitive, limited-slip front differential for genuine traction in mixed terrain, backed by a dual-range transmission and reverse gear for handling everything from tight technical trails to open field work. ATV.com's own owner feedback consistently praised the compact chassis specifically for maneuverability — one Missouri owner noted "most of the other quads I considered were just too big... can't maneuver those monsters in Ozark timber, might as well get a Jeep instead of a quad if you want something that big." Sturdy suspension delivers genuinely good ground tracking, while solid wrinkle-paint luggage racks handle real work loads and tools without excessive wear. A digital instrument screen on fuel-injected models gave riders clear feedback on ride status, and a Camo livery option (offered on both ASi and FSi trims in later years) added photo-realistic graphics genuinely useful for hunters and forest workers wanting to blend into the terrain. Owner reviews across this platform consistently cite comfortable ergonomics, smooth ride quality, and genuinely strong fuel economy as the KingQuad 400's defining real-world strengths.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2003-2012 KingQuad LT-A400 running the way it was built to.