Z400 Black Z400 White Z400 Yellow

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.

New for 2007, the Quadsport Z400 is available in a limited-edition version featuring sleek black bodywork with aggressive graphics and a red frame.

Powering the QuadSport Z400 is a high-performance 398cc liquid-cooled, DOHC, single cylinder four-stroke engine with a 37mm Mikuni carburetor with TPS. 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 phosphorus-silicon-carbide coating, known as SCEM (Suzuki Composite Electrochemical Material), for reduced weight and improved heat transfer, allowing for tighter and more efficient piston-to-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 fivespeed 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 with piggyback reservoir shocks provides 8.5 inches (21mm) of travel. Out back, an aluminum-alloy swingarm utilizes a fully adjustable piggyback reservoir shock with 9.1 inches (230mm) of wheel travel. A high-impact skid plate is standard equipment as are durable, serrated-steel footpegs. Wheelbase measures 49 inches (1245mm) with a full 10.4 inches (265mm) 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 31.9 inches (810mm) and smoothly transitions to the bodywork and lightweight 2.65-gallon (10-liter) fuel tank. A multi-reflector taillight mounted at the rear completes the QuadSport Z400. The Z400 has a sharply angled nose with stacked dual headlights, twin air intakes and high-mounted, deeply flared front and rear fenders.

LT-Z400 (K7) AT A GLANCE

Suggested Retail: $5,899.00 Limited Edition - $5,999.00
Engine Type: 398cc, four-stroke liquid-cooled
Transmission: Five-speed manual
Wheelbase: 49.0 inches (1245 mm)
Dry Weight: 373 lbs. (169 kg.)

QUADSPORT Z400 (K7)
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 ........................................1245 mm (49.0in)
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 single
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 reduction 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 reduction 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)
Caster ....................................................................8.5°
Trail ......................................................36 mm (1.42 in)
Toe-in ......................................................5 mm (0.20 in)
Camber ..................................................................–0.9°
Steering angle ..........................................................41°
Turning radius ........................................3.1 m (10.2 ft)
Front brake ..........................................Disk brake, twin
Rear brake ....................................................Disk brake
Front tire size ..........................AT22x 7 R10**, tubeless
Rear tire size............................AT20x10 R 9**, tubeless

ELECTRICAL

Ignition type ..............................Electronic ignition (CDI)
Ignition timing ........................10° B.T.D.C. at 1500 rpm
Spark plug ................NGK CR7E or DENSO U22ESR-N
Battery ................................12 V 28.8 kC (8 Ah)/10 HR
Generator ..........................Three-phase A.C. generator
Main fuse................................................................20 A
Fan fuse ................................................................10 A
Headlight ............................................12 V 30/30 Wx2
Brake light/Taillight ....................................12 V 21/5 W
Neutral indicator light ....................................12 V 3 W
Reverse indicator light ....................................12 V 3 W
Coolant tempereture warning light..................12 V 3 W

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)
filter change..................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)