Kawasaki KX 85 Monster Energy - 2009 Specifications and Reviews

The 2009 Kawasaki KX 85 Monster Energy is a lightweight motocross bike engineered for young and intermediate riders transitioning to competition. Its 84cc single-cylinder engine delivers manageable power with a compact 69kg frame, while the 841mm seat height ensures accessibility for smaller riders. Known for reliable performance in junior motocross racing, it excels in technical terrain and provides an ideal platform for developing riding skills.

2009
5 stars Average rating: 5 from 4 votes
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General information

CategoryCross / motocross
Year2009
ModelKawasaki KX 85 Monster Energy

Engine and Transmission Specifications

Gearbox6-speed
IgnitionDigital CDI
Fuel systemCarburettor. Keihin PWK28
Bore x stroke48.5 x 45.8 mm (1.9 x 1.8 inches)
Compression10.0:1
Stroke2
Engine typeSingle cylinder
Capacity:84.00 ccm (5.13 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,255 mm (49.4 inches)
Ground clearance340 mm (13.4 inches)
Overall width734 mm (28.9 inches)
Overall height1,054 mm (41.5 inches)
Seat height841 mm (33.1 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc69.0 kg (152.1 pounds)
 
 

Kawasaki KX 85 Monster Energy dimensions and frame

Rear brakesSingle disc
Front brakesSingle disc
Rear tyre dimensions90/90-14
Front tyre dimensions70/80-17
Rear suspensionUNI-TRAK® single-shock system with 4-way compression and 16-way rebound damping, plus adjustable spring preload / 10.8 in.
Front suspension36mm inverted telescopic cartridge fork with 18-way compression damping / 10.8 in.
Frame typeHigh-tensile steel perimeter design with subframe member

Speed and acceleration

Color optionsEbony black
Fuel capacity5.67 litres (1.50 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track70%
City5%
Cornering80%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a small-wheel 85cc motocross machine built specifically for younger or smaller riders progressing through junior racing ranks, not for adult beginners.
PurposeIt exists purely for competitive amateur motocross and off-road racing, designed to build race craft before stepping up to full-size 125cc+ machines.
Rider FitIts low seat height, compact dimensions, and light overall weight make it manageable for smaller-statured or younger riders rather than full-size adults.
CharacterThe two-stroke single delivers a peaky, high-revving power delivery that rewards aggressive clutch and throttle work with sharp, flickable handling on rough terrain.
Not Ideal ForIt is not suitable for road use, daily commuting, passengers, or larger adult riders seeking a general-purpose motorcycle.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2009 Kawasaki KX 85 Monster Energy Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 841mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2009 Kawasaki KX 85 Monster Energy, with a cramped knee angle of around 70 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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