Engineered by KTM for the minibike, cross motorcycle segment, the 2003 KTM 65 SX features a 64.9 cc (4 cu in) liquid-cooled single cylinder, two-stroke configuration. Internal engine geometry specifies a bore and stroke of 45.0 x 40.8 mm (1.8 x 1.6 inches).
On the scales, the 65 SX measures 55.6 kg (123 lbs) dry. Rider ergonomics and chassis geometry center around a 750 mm (29.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,137 mm (44.8 in) wheelbase engineered for quick, flickable steering geometry. The 3.4-liter (0.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's KTM archive, this model family spans 22 indexed model years from 2003 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
750 mm (29.5 in)
Engine
Displacement64.9 ccm (3.96 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Bore x Stroke45.0 x 40.8 mm (1.8 x 1.6 inches)
Fuel SystemCarburettor
CoolingLiquid
Transmission
Final DriveChain (final drive)
Chassis
Front Travel220 mm (8.7 inches)
Rear Travel270 mm (10.6 inches)
Wheelbase1137 mm (44.8 inches)
Ground Clearance290 mm (11.4 inches)
Wheels & Brakes
Front Tyre60/100-14
Rear Tyre80/100-12
Front BrakesSingle disc
Front Brake Ø200 mm (7.9 inches)
Rear BrakesSingle disc
Rear Brake Ø160 mm (6.3 inches)
Dimensions & Weight
Dry Weight55.6 kg (122.6 pounds)
Seat Height750 mm (29.5 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
