KTM 85 SX 17-14 - 2021 Specifications and Reviews

The 2021 KTM 85 SX 17-14 is a competition-focused two-stroke motocross bike designed for junior riders transitioning from smaller machines. Its potent 84.9cc liquid-cooled engine delivers responsive power delivery ideal for learning advanced racecraft on the track. Known for nimble handling and proven reliability, it remains a top choice for aspiring motocross competitors.

Not Rated stars Average rating: Not Rated from 0 votes
.

General information

CategoryCross / motocross
Year2021
ModelKTM 85 SX 17-14

Engine and Transmission Specifications

Driveline1/2  x  5/16
ClutchWet, multi-disc clutch, Formula hydraulics
Transmission typeChain   (final drive)
Gearbox6-speed
Cooling systemLiquid
Lubrication systemMixture oil lubrication
IgnitionMEDJ digital EMS
Fuel systemCarburettor. Mikuni TMX
Bore x Stroke47.0 x 49.0 mm (1.9 x 1.9 inches)
Engine detailsReed intake.
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 wheel travel305 mm (12.0 inches)
Rear SuspensionWP Xplor PDS shock absorber
Front wheel travel278 mm (10.9 inches)
Front SuspensionXACT 43 WP Upside-Down fork, Ø 43 mm
Rake (fork angle)24.0°
Frame typeCentral-tube frame with double-cradle
 
 

Physical measures and capacities

Fuel capacity5.20 litres (1.37 US gallons)
Wheelbase1290 mm (50.8 inches)
Ground clearance336 mm (13.2 inches)
Seat height865 mm (34.1 inches) If adjustable, lowest setting.
Dry weight67.0 kg (147.7 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterKick
Color optionsOrange/white/black

Performance Profile & Rider Fit

29 hp
Peak Power (est.)

Best For

Track6%
City5%
Cornering10%
Daily Riding4%
Touring2%
Passenger0%

Rider Profile

Best ForFor young or lightweight racers progressing beyond minis; demands competent throttle and clutch control to manage its peaky two-stroke power.
PurposeA dedicated youth motocross racer built for closed dirt circuits, jumps and berms - pure competition, not transport.
Rider FitTiny and feather-light with a 750mm seat, 280mm ground clearance and long-travel WP suspension; sized for smaller riders on 17/14 wheels.
CharacterSharp, revvy and aggressive - a snappy liquid-cooled two-stroke that rewards commitment with explosive acceleration and razor agility.
Not Ideal ForNot for road use, commuting, touring or passengers; no lights, kick-start only, knobby tires and race-only intent make it street-illegal.

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

Rider Fit Visualizer

2021 KTM 85 SX 17-14 Rider Ergonomics Assessment

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

Feet:

At 865mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2021 KTM 85 SX 17-14, with a cramped knee angle of around 75 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.

Find bikes that fit your height →

Rider Reviews

Total comments: 1
64x64

MotorcycleDB Review

The 2021 KTM 85 SX 17-14 is an impressive off-road motorcycle that delivers exceptional performance and handling. With a powerful 85cc engine and a lightweight chassis, this bike is designed for young riders looking to conquer the dirt. Its 17-inch front and 14-inch rear wheels provide excellent traction and stability, while the high-quality suspension system ensures a smooth and controlled ride over rough terrain. Whether you're hitting the trails or racing on the track, the KTM 85 SX 17-14 is a top choice for riders who demand the best in performance and reliability. In addition to its impressive capabilities, the 2021 KTM 85 SX 17-14 boasts a sleek and aggressive design that is sure to turn heads. The striking orange color scheme and bold KTM branding give this bike a distinctive look that sets it apart from the competition. With its combination of power, precision, and style, the KTM 85 SX 17-14 is an outstanding choice for young riders who are serious about off-road riding. Whether you're a competitive racer or a weekend warrior, this bike has everything you need to take your off-road adventures to the next level.
Reply

Add a Comment


Please Login or Register if you would like to leave a comment.