KTM 85 SX - 2019 Specifications and Reviews

The 2019 KTM 85 SX is a lightweight two-stroke motocross bike designed for young and intermediate riders transitioning to competitive off-road racing. Known for its sharp handling and aggressive performance, it features WP suspension, a centralized frame design, and a potent 85cc engine that delivers responsive power delivery. Its compact dimensions and minimal weight make it the go-to choice for junior motocross competitors seeking a race-ready platform.

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General information

CategoryCross / motocross
Year2019
ModelKTM 85 SX
 
 

Engine and Transmission Specifications

ClutchWet
Transmission typeChain   (final drive)
Bore x Stroke47.0 x 49.0 mm (1.9 x 1.9 inches)
Engine typeSingle cylinder, two-stroke
Capacity:84.9 ccm (5.18 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Diameter240 mm (9.4 inches)
Front brakesSingle disc
Rear SuspensionWP monoshock
Front SuspensionWP upside-down Ø 43 mm
Frame typeCentral-tube frame with double-cradle

Physical measures and capacities

Fuel capacity5.20 litres (1.37 US gallons)
Ground clearance362 mm (14.3 inches)
Seat height890 mm (35.0 inches) If adjustable, lowest setting.
Dry weight68.0 kg (149.9 pounds)

Other specs

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

Performance Profile & Rider Fit

Best For

Track60%
City5%
Cornering85%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a competition minibike built for young, developing riders who already have solid off-road fundamentals, not for beginners or adults.
PurposeIt exists purely for motocross racing and track training at the junior level, with a peaky two-stroke engine and race-focused chassis.
Rider FitIts tiny 890mm seat height and 68kg dry weight are tailored to smaller, lighter riders, typically kids in their early-to-mid teens transitioning from an 65cc bike toward full-size motocross machines.
CharacterIt's an aggressive, high-revving two-stroke racer that rewards precise clutch and throttle control with sharp, flickable handling on motocross tracks.
Not Ideal ForThis is not suitable for adult riders, commuting, road use, touring, or carrying a passenger.

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

Rider Fit Visualizer

2019 KTM 85 SX Rider Ergonomics Assessment

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

Feet:

At 890mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2019 KTM 85 SX, with a cramped knee angle of around 80 degrees and an upright riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). 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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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2019 KTM 85 SX motorcycle is a high-performance bike designed for young riders looking to take their skills to the next level. This bike features a powerful 2-stroke engine, lightweight chassis, and top-of-the-line suspension, making it ideal for motocross and off-road racing. The 85 SX also boasts a responsive and easy-to-handle design, allowing riders to navigate through challenging terrain with ease. With its aggressive appearance and advanced features, the 2019 KTM 85 SX is a top choice for aspiring young riders. Overall, the 2019 KTM 85 SX motorcycle is a top-of-the-line option for young riders looking to compete in motocross and off-road racing. With its powerful engine, lightweight chassis, and top-notch suspension, this bike offers exceptional performance and handling. Whether you're hitting the track or exploring the trails, the 85 SX delivers an exhilarating riding experience for young enthusiasts.
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