Built around KTM's minibike, cross motorcycle platform, the 2011 KTM 65 SX pairs a 64.9 cc (4 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. 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 55.4 kg (122 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 3.5-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. Mikuni TM 24
IgnitionAET digital
LubricationMixture oil lubrication 1:60
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet mDouble disk clutch, operated hydraulically
Driveline14:50. Primary drive: 23:75.
Performance
ExhaustAluminium
Chassis
Frame TypeDouble grinded central double-cradle-type frame. Subframe: Aluminium.
Rake25.5°
Front SuspensionMarzocchi USD 35 mm (1.38 in)
Front Travel185 mm (7.3 inches)
Rear SuspensionWP mono shock
Rear Travel185 mm (7.3 inches)
Wheelbase1137 mm (44.8 inches)
Ground Clearance280 mm (11.0 inches)
Wheels & Brakes
Front Tyre60/100-14
Rear Tyre80/100-12
Front BrakesSingle disc
Front Brake Ø198 mm (7.8 inches)
Rear BrakesSingle disc
Rear Brake Ø160 mm (6.3 inches)
Wheels1.6 x 14in., 1.6 x 12in. Alu
Dimensions & Weight
Dry Weight55.4 kg (122.1 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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
