KTM 65 SX - 2021 Specifications and Reviews

The 2021 KTM 65 SX is a lightweight minibike designed for young riders progressing through motocross, featuring a 65cc liquid-cooled two-stroke engine with responsive power delivery and nimble handling. Known for its durability and race-ready performance, it combines professional-grade components like Formula hydraulics and a six-speed gearbox to bridge the gap between beginner and intermediate levels.

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General information

CategoryMinibike, cross
Year2021
ModelKTM 65 SX

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 Stroke45.0 x 40.8 mm (1.8 x 1.6 inches)
Engine typeSingle cylinder, two-stroke
Capacity:64.9 ccm (3.96 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Diameter198 mm (7.8 inches)
Front brakesSingle disc
Rear wheel travel270 mm (10.6 inches)
Rear SuspensionXACT WP mono shock
Front wheel travel215 mm (8.5 inches)
Front SuspensionXACT 43 WP Upside-Down fork, Ø 43 mm
Rake (fork angle)25.5°
Frame type25CrMo4 steel central-tube
 
 

Physical measures and capacities

Fuel capacity3.50 litres (0.92 US gallons)
Wheelbase1270 mm (50.0 inches)
Ground clearance280 mm (11.0 inches)
Seat height750 mm (29.5 inches) If adjustable, lowest setting.
Dry weight53.0 kg (116.8 pounds)

Other specs

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

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering80%
Daily Riding10%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a purpose-built children's motocross machine designed for young, developing riders progressing through junior competition ranks, not for adults or beginners of any age.
PurposeBuilt exclusively for motocross and off-road track racing to teach real race craft on a scaled-down, competition-grade two-stroke.
Rider FitIts tiny 53.5 kg dry weight, low 730 mm seat height, and light clutch and controls are tailored to a child's small stature and limited strength.
CharacterA snappy, high-revving two-stroke with a six-speed gearbox that rewards clutch and throttle skill, encouraging aggressive, race-focused riding.
Not Ideal ForThis is not suitable for adult riders, commuting, touring, passengers, or anyone seeking road-legal or long-distance capability.

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

Rider Reviews

Total comments: 1
64x64

MotorcycleDB Review

The 2021 KTM 65 SX is an exceptional motocross bike that is perfect for young riders looking to improve their skills. With a powerful 2-stroke engine and a lightweight chassis, this bike is nimble and easy to handle on the tracks. The adjustable suspension allows riders to fine-tune the bike to their preferences, while the advanced braking system provides confidence-inspiring control. The 2021 KTM 65 SX is an all-around impressive machine that will help young riders develop their skills and progress to the next level of competition. In conclusion, the 2021 KTM 65 SX is a top-notch choice for young motocross riders who are serious about improving their skills and competing at a high level. Its powerful engine, lightweight chassis, and adjustable suspension make it a standout in its class. With its advanced braking system and overall performance, the KTM 65 SX is a great investment for young riders looking to take their motocross journey to the next level.
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