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2021 KTM 65 SX
2021 KTM 65 SX

Specs

General Information

Manufacturer
KTM
KTM
Model Year
2021
2021
Model
65 SX
65 SX
Model Code
65SX
65SX
Color
Orange
Orange

Brakes/Wheels/Tires

Brakes

Front - 198 mm Disc

Rear - 160 mm Disc

Front - 198 mm Disc

Rear - 160 mm Disc

Dimensions

Weight
Without Fuel - 116.8 lb. (53 kg)
Without Fuel - 116.8 lb. (53 kg)
Ground Clearance
11 in. (280 mm)
11 in. (280 mm)
Seat Height
29.5 in. (750 mm)
29.5 in. (750 mm)

Drivetrain

Transmission
6-speed
6-speed
Chain
1/2 x 1/4 in.
1/2 x 1/4 in.

Engine

Engine
2-stroke
2-stroke
Cylinders
Single
Single
Displacement
64.9 cc
64.9 cc
Bore x Stroke
45 x 40.8 mm
45 x 40.8 mm
Clutch
Wet, multi-disc, Formula hydraulics
Wet, multi-disc, Formula hydraulics
Starting
Kickstarter
Kickstarter
Fuel Capacity
Approx. - 0.9 gal. (3.5 l)
Approx. - 0.9 gal. (3.5 l)

Operational

Frame
25CrMo4 steel central-tube
25CrMo4 steel central-tube
Front Suspension

XACT 35 WP Upside-Down fork, Ø 35 mm

Travel - 215 mm

XACT 35 WP Upside-Down fork, Ø 35 mm

Travel - 215 mm

Rear Suspension

XACT WP mono shock

Travel - 270 mm

XACT WP mono shock

Travel - 270 mm

Rake
64.5°
64.5°

Features

Bodywork & Graphics

  • DECALS: The 2021 KTM SX models feature the latest in-mold graphics, matching the factory-look orange frames and bodywork perfectly. They have a fast and aggressive style that screams READY TO RACE, leaving no doubt as to the bikes' high-performance intentions.

Chassis

  • FRAME: The modern frame is made from lightweight, high strength chromoly steel profiles and combines maximum longitudinal stiffness with optimum torsional rigidity. It guarantees easy handling and precise cornering, but also outstanding stability.
  • SWINGARM: The KTM 65 SX is fitted with a lightweight cast aluminum swingarm. Conceived using the latest in calculation and simulation software, the focus of the design was for minimum weight, optimum stiffness and precisely defined flexibility. In addition, it features a robust 2-compound chain guide, similar to the full-size models.
  • WHEELS: Like the full-size KTM Factory racers, the 65 SX has super lightweight, black anodized, aluminum rims providing the highest strength and durability. The OEM MAXXIS knobby tires grip superbly on any surface.
  • FRONT SUSPENSION: The KTM 65 SX is the first model in its class to be fitted with a modern, fully adjustable air fork: the WP XACT fork with AER technology. The upside-down front fork with a 35 mm tube diameter and 215 mm of travel ensures outstanding comfort, damping characteristics and directional stability. Another main benefit for junior riders is that the air spring fitted in the left fork leg can be adjusted perfectly to the rider's weight using a simple air pump.
  • REAR SUSPENSION: The high quality WP XACT shock absorber is linked directly to the swingarm, providing excellent damping performance. It is fully adjustable, meaning you can set the damping perfectly to suit the rider's preference and track conditions. The shock absorber allows for 270 mm of rear wheel travel.
  • BRAKES: The front and rear brakes have massive 4 piston calipers that grip lightweight wave brake discs - 198 mm front and 160 mm rear. The hydraulic brake system is easy to control and ensures the best deceleration and the highest standard when it comes to performance.

Engine & Exhaust

  • ENGINE: The KTM 65 SX features cutting-edge 2-stroke technology and an easy-to-shift 6-speed transmission with a hydraulic clutch. Benefitting from a reworked ignition curve, the cylinder, with its pressure-controlled exhaust valve, continues to provide class-leading power and plenty of torque.
  • CYLINDER: The high performance cylinder features a pressure-controlled exhaust valve (PCEV) and provides unrivaled performance within the highly competitive 65 cc class.
  • CLUTCH: An outstanding feature of the KTM 65 SX is the hydraulic clutch made by Formula. It provides easy clutch action and well-defined modulation.
  • COOLING: An intelligent cooling circuit with integrated crankcase cooling and two radiators improves the heat dissipation and ensures a constant temperature balance for consistent, high performance.

Ergonomics & Comfort

  • HANDLEBAR: The high-quality anodized handlebar made from aluminum alloy has the perfect bend to suit the ergonomics and the highest strength. A slide pad on the handlebar brace protects the rider in the event of contact.

Bodywork & Graphics

  • DECALS: The 2021 KTM SX models feature the latest in-mold graphics, matching the factory-look orange frames and bodywork perfectly. They have a fast and aggressive style that screams READY TO RACE, leaving no doubt as to the bikes' high-performance intentions.

Chassis

  • FRAME: The modern frame is made from lightweight, high strength chromoly steel profiles and combines maximum longitudinal stiffness with optimum torsional rigidity. It guarantees easy handling and precise cornering, but also outstanding stability.
  • SWINGARM: The KTM 65 SX is fitted with a lightweight cast aluminum swingarm. Conceived using the latest in calculation and simulation software, the focus of the design was for minimum weight, optimum stiffness and precisely defined flexibility. In addition, it features a robust 2-compound chain guide, similar to the full-size models.
  • WHEELS: Like the full-size KTM Factory racers, the 65 SX has super lightweight, black anodized, aluminum rims providing the highest strength and durability. The OEM MAXXIS knobby tires grip superbly on any surface.
  • FRONT SUSPENSION: The KTM 65 SX is the first model in its class to be fitted with a modern, fully adjustable air fork: the WP XACT fork with AER technology. The upside-down front fork with a 35 mm tube diameter and 215 mm of travel ensures outstanding comfort, damping characteristics and directional stability. Another main benefit for junior riders is that the air spring fitted in the left fork leg can be adjusted perfectly to the rider's weight using a simple air pump.
  • REAR SUSPENSION: The high quality WP XACT shock absorber is linked directly to the swingarm, providing excellent damping performance. It is fully adjustable, meaning you can set the damping perfectly to suit the rider's preference and track conditions. The shock absorber allows for 270 mm of rear wheel travel.
  • BRAKES: The front and rear brakes have massive 4 piston calipers that grip lightweight wave brake discs - 198 mm front and 160 mm rear. The hydraulic brake system is easy to control and ensures the best deceleration and the highest standard when it comes to performance.

Engine & Exhaust

  • ENGINE: The KTM 65 SX features cutting-edge 2-stroke technology and an easy-to-shift 6-speed transmission with a hydraulic clutch. Benefitting from a reworked ignition curve, the cylinder, with its pressure-controlled exhaust valve, continues to provide class-leading power and plenty of torque.
  • CYLINDER: The high performance cylinder features a pressure-controlled exhaust valve (PCEV) and provides unrivaled performance within the highly competitive 65 cc class.
  • CLUTCH: An outstanding feature of the KTM 65 SX is the hydraulic clutch made by Formula. It provides easy clutch action and well-defined modulation.
  • COOLING: An intelligent cooling circuit with integrated crankcase cooling and two radiators improves the heat dissipation and ensures a constant temperature balance for consistent, high performance.

Ergonomics & Comfort

  • HANDLEBAR: The high-quality anodized handlebar made from aluminum alloy has the perfect bend to suit the ergonomics and the highest strength. A slide pad on the handlebar brace protects the rider in the event of contact.