The 85cc-class mini-motocrosser has long been the training crucible for the world's top racers. For much of that time, Kawasaki's KX™85 has been at the forefront. The level of technology, power and berm-busting capability packed into this 152-pound rocketship is mind-boggling, and the way it can tear up a motocross track in an expert's hands must be seen to be believed. It's nothing short of a youth motocrosser's dream machine.
At A Glance
Liquid-cooled, two-stroke, 84cc engine features a lightweight Electrofusion-coated cylinder that improves heat transfer while resisting abrasion and seizure
Kawasaki Integrated Power-valve System varies exhaust port height for increased horsepower and produces a powerband with more low-end torque and mid-range, while retaining excellent top-end power
Uni-Trak® rear suspension is fully adjustable for compression and rebound damping and spring preload
Rigid 36mm inverted cartridge forks are 18-way adjustable and provide better steering response and control
28mm Keihin PWK carburetor is tuned for ideal fuel atomization, providing quicker throttle response and a smoother power delivery
Six-speed transmission has chrome-finished shift fork ends to resist wear and seizing while bushings on the second, third and fourth gears on the output shaft increase durability
Industry-leading amateur racer support through Team Green™
Liquid-Cooled, Two-Stroke, Single-Cylinder 84cc Engine
Lightweight Electrofusion-coated cylinder improves heat transfer while resisting abrasion and seizure
Intake and exhaust port bridges are machine-finished for reduced wear and improved reliability
Liquid cooling means even-running temperatures and consistent power output
Rotor comes with rare-earth magnets; the unitized piece is small, light and more efficient; low inertial moment improves low-rpm response
Connecting rod big-end bearing has more rigid cage for improved durability
Intake port shape and cylinder skirt allow cooling air into the crankcase chamber
Primary gear is secured using a lock-nut to help reduce mechanical noise
Metafoam gaskets for the generator and water pump covers improve sealing
Kawasaki Integrated Power Valve System (KIPS®)
KIPS system varies exhaust-port height for increased horsepower and torque at all rpm
Produces a broad powerband with more low-end torque and mid-range, while retaining excellent top-end power
Breather in KIPS cover improves high-rpm and overrun performance
Large right-side cutout improves airflow for increased power
Reusable foam air filter
28mm Keihin PWK Carburetor
Large crescent slide positions the needle closer to intake ports for ideal fuel atomization, providing quicker throttle response and a smoother power delivery
Carburetor adjustable for various conditions
Features large-diameter O-ring and groove on exhaust pipe for improved durability and easy installation
Aluminum silencer is re-packable like larger KX models
Thick-base clutch hub rides on needle bearings for smooth action
Large, 119mm clutch plates add durability and control
Clutch-release lever ratio is designed for light clutch lever action
Clutch plate service cover simplifies maintenance and utilizes a metal-carbon composite gasket
Positive shifting action and rugged durability
Fifth and sixth gears ride on bushings for added reliability
Shift forks are hard chrome-finished to resist wear and seizing
Convenient oil-level window offers easy level checks
Bushings on the second, third and fourth gears increase durability
High-Tensile Steel Perimeter Frame
Wide, steel footpegs offer added control and strength.
Thick footpeg-mount brackets withstand today's rigorous tracks
Engine and chassis bolts feature rust-resistant coating
Fuel tank design lowers center of gravity for improved handling
Uni-Trak® Rear Suspension
Swingarm uses large cross-section beams for improved rigidity and control
Cast-aluminum drive chain adjuster sections allow easy chain adjustments
Shock is fully adjustable for compression and rebound damping and spring preload
36mm Inverted Cartridge Fork
Inverted fork is rigid, providing better steering response and control
Compression damping is 18-way adjustable
Aluminum upper fork tubes measure 49.5mm in diameter for flex-free performance
Front brake lever shape offers optimum feel
Forged-aluminum rear brake pedal is strong, lightweight and features two seals at the pivot for smooth operation and increased durability
Provide strong braking power with minimal effort
Lightweight Aluminum Rims
Black-coated lightweight aluminum rims offer a factory look
Rear hub features two bearings on the drive side for added durability
Large rear-axle diameter for optimum rigidity
Aggressive Kawasaki graphics complement the black frame and wheels
Engine: Two-stroke single with KIPS®
Bore x Stroke: 48.5 x 45.8mm
Cooling System: Liquid
Carburetion: Keihin PWK28
Induction: Crankcase reed valve
Compression ratio: 10.0:1 (low speed) – 9.2:1 (high speed)
Ignition: Digital CDI
Final drive: Chain
Frame Type: High-tensile steel perimeter design with subframe member
Rake/Trail: 27 degrees / 3.5 in.
Front suspension / wheel travel: 36mm inverted telescopic cartridge fork with 18 position compression damping adjustment/ 10.8 in.
Rear suspension / wheel travel: UNI-TRAK® single shock system with 4 position compression and 20 position damping adjustment plus adjustable spring preload/ 10.8 in.
Front Tire Size: 70/100x17
Rear Tire Size: 90/100x14
Front brakes / rear brakes: Hydraulic disc / Disc
Overall length: 71.7 in.
Overall width: 28.9 in.
Overall height: 41.5 in.
Ground clearance: 13.4 in.
Seat height: 33.1 in.
Curb weight: 152.1 lbs.
Fuel capacity: 1.5 gal.
Wheelbase: 49.4 in.