2005 SUZUKI
QUADSPORT Z400
 The
Suzuki QuadSport Z400 continues to be a dominant
force in the sport ATV category, both in the showroom
and on the track. The Z400 features an advanced
four-stroke powerplant, state-of-the art chassis
and suspension components and a slick-shifting five-speed
transmission all combined in a powerful, nimble
and lightweight package.
For 2005 the QuadSport Z400 receives the following
upgrades:
- New aluminum front bumper and rear grab-bar.
- Larger 37mm Mikuni carburetor with throttle
position sensor linked to the ignition system.
- Redesigned cam profiles for increased power
output.
- Additional clutch drive plate (8 to 9) for
improved clutch actuation feel.
- New aluminum gearshift pedal for weight
reduction.
- Magnesium clutch cover, valve cover and
ignition cover for weight reduction.
- New reservoir-type front shock absorbers
for improved suspension action.
In addition, the white version Z400 sports a
new blue frame and both colors feature a new graphics
package for a more aggressive look.
Powering the QuadSport Z400 is a high-performance
398cc liquid-cooled, DOHC, single cylinder four-stroke
engine. Its bore and stroke measure 90.0mm x 62.6mm.
Four valves are actuated by cam lobes riding directly
on bucket tappets. The cylinder head features a
narrow 28-degree included valve angle for a compact,
efficient combustion chamber with an 11.2:1 compression
ratio. Fuel is fed through 36mm intake valves, with
exhaust leaving through 29mm valves. A dry sump
lubrication system contributes to the more compact
engine package.
The aluminum-alloy cylinder is plated with Suzuki's
own race-proven nickel phosphorussilicon-carbide
coating, known as SCEM (Suzuki Composite Electrochemical
Material), for reduced weight and improved heat
transfer, allowing for tighter and more efficient
pistonto-cylinder clearance. Additionally, the piston
is forged aluminum-alloy for even more weight savings.
A counter-balancer shaft reduces vibration, while
an automatic cam chain tensioner and an electronic
CDI ignition simplify maintenance duties. A manual
five-speed transmission (with reverse gear) transmits
horsepower to the wheels. A handy knob on the front
left fender releases the reverse interlock to select
reverse gear with final drive transmitted through
an O-ring sealed roller chain. Suzuki's own Start-In-Gear
System allows the engine to be started in any gear
when the left brake lever is applied.
The QuadSport Z400 starts with a lightweight,
rigid, high-tensile-steel-alloy tube frame and sub-frame.
An independent double-wishbone front suspension
system provides 215mm (8.5 inches) of travel. Out
back, an aluminum-alloy swingarm utilizes a fully
adjustable piggyback reservoir shock with 230mm
(9.1 inches) of wheel travel. A highimpact skid
plate is standard equipment as are durable, serrated-steel
footpegs.
Wheelbase measures 1245mm (49 inches) with a
full 265mm (10.4 inches) of ground clearance. Rolling
stock consists of aluminum alloy wheels shod with
Dunlop radial tires for maximum traction and performance.
The Z400's T-shaped seat is narrow at the front
and flares out over the rear fenders, allowing the
rider to comfortably shift weight back and forth
and side to side. Seat height is set at 810mm (31.9
inches) and smoothly transitions to the bodywork
and lightweight 10-liter (2.65-gallon) fuel tank.
A multi-reflector taillight mounted at the rear
completes the QuadSport Z400. One look is all it
takes to appreciate the QuadSport Z400's sporty,
aggressive styling.
The Z400 has a sharply angled nose with stacked
dual headlights, twin air intakes and high-mounted,
deeply flared front and rear fenders. The result
is the most unique Suzuki ATV ever built.
The '05 Suzuki QuadSport Z400. Engineered for
fun.
 LT-Z400
(K5) AT A GLANCE
- Suggested Retail: $5,799.00
- Engine Type: Four-stroke, single cylinder,
liquid-cooled, DOHC
- Transmission: Five-speed manual
- Front Brake: Twin Hydraulic Disc
- Rear Brake: Single Hydraulic Disc
- Wheelbase: 49.0 in. (1245 mm)
- Dry Weight: 373 lbs. (169 kg)
LT-Z400 (K5) SPECIFICATIONS
DIMENSIONS AND DRY MASS
- Overall length: 1830 mm (72.0 in)
- Overall width: 1165 mm (45.9 in)
- Overall height: 1160 mm (45.7 in)
- Wheelbase: 245 mm (49.0 in)
- Front track: 935 mm (36.8 in)
- Rear track: 910 mm (35.8 in)
- Ground clearance: 265 mm (10.4 in)
- Seat height: 810 mm (31.9 in)
- Dry mass: 169 kg (373 lbs)
ENGINE
- Type: Four stroke, liquid-cooled, DOHC
- Number of cylinders: 1
- Bore: 90.0 mm (3.543 in)
- Stroke: 62.6 mm (2.465 in)
- Displacement: 398 cm3 (24.3cu. in)
- Compression ratio: 11.2:1
- Carburetor: MIKUNI BSR37
- Air cleaner: Polyurethane foam element
- Starter system: Electric
- Lubrication system: Dry sump
- Idle speed: 1500 ± 100 r/min
DRIVE TRAIN
- Clutch: Wet multi-plate type
- Transmission: 5-forward and 1-reverse
- Gearshift pattern:
forward: 1 down, 4 up, foot operated
reverse: Foot/hand operated
- Primary drive ratio: 2.960 (74/25)
- Gear ratios:
Low: 2.538 (33/13)
2nd: 1.666 (30/18)
3rd: 1.238 (26/21)
4th: 1.000 (23/23)
Top: 0.846 (22/26)
Reverse: 2.153 (28/13)
- Final drive ratio: 2.857 (40/14)
- Drive chain: RK 520SMOZ10S, 96 Links
 CHASSIS
- Front suspension: Independent, double wishbone,
coil spring, oil damped
- Rear suspension: Swingarm-type, coil spring,
oil damped
- Front wheel travel: 215 mm (8.5 in)
- Rear wheel travel: 230 mm (9.1 in)
- Steering angle: 41°
- Caster: 8.5°
- Trail: 36 mm (1.42 in)
- Toe-in: 5 mm (0.20 in)
- Camber: -9°
- Turning radius: 3.1 m (10.2 ft)
- Front brake: Disk brake, twin
- Rear brake: Disk brake
- Front tire size: AT22x7 (R10), tubeless
- Rear tire size: AT20x10 (R9), tubeless
ELECTRICAL
- Ignition type: Electronic ignition (CDI)
- Ignition timing: 10° B.T.D.C. at 1500 r/min
- Spark plug: NGK CR7E or DENSO U22ESR-N
- Battery: 12V 28.8 kC (8 Ah)/10 HR
- Generator: Three phase A.C. generator
- Main fuse: 20A
- Fan fuse: 10A
- Headlight: 12V 30/30Wx2
- Brake light/Taillight: 12V 21/5W
- Neutral indicator light: 12V 3W
- Reverse indicator light: 12V 3W
- Coolant temperature warning light: 12V 3W
CAPACITIES
- Fuel tank, including reserve: 10.0 L (2.6/2.2
US/Imp gal)
reserve: 2.7 L (0.7/0.6 US/Imp gal)
- Engine oil:
oil change: 2000 ml (2.1/1.8 US/Imp qt)
with filter: 2100 ml (2.2/1.8 US/Imp qt)
overhaul: 2200 ml (2.3/1.9 US/Imp qt)
- Coolant: 1.2 L (1.3/1.1 US/Imp qt)
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