Motocross Bikes
2021KTM 65 SX
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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.
- Capacity
- 64.9 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 53.0 kg
- Seat height
- 750 mm
- Power
- Not on record
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What’s new for the 2021 KTM 65 SX
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front suspension | WP upside-down Ø 35 mm | XACT 43 WP Upside-Down fork, Ø 43 mm |
| Rear suspension | WP shock absorber | XACT WP mono shock |
| Front brakes | Single disc. Four-piston calipers. Wave brake discs. | Single disc |
| Rear brakes | Single disc. Two-piston calipers. Wave brake discs. | Single disc |
| Wheelbase | 1137 mm (44.8 inches) | 1270 mm (50.0 inches) |
Other years
2003
2004
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2006
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2008
2009
2010
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2021
2022
2023
2024
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2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built exclusively for motocross and off-road track racing to teach real race craft on a scaled-down, competition-grade two-stroke.
- Built for
- A snappy, high-revving two-stroke with a six-speed gearbox that rewards clutch and throttle skill, encouraging aggressive, race-focused riding.
- Not ideal for
- This is not suitable for adult riders, commuting, touring, passengers, or anyone seeking road-legal or long-distance capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 64.9 ccm
- Engine type
- Single, two-stroke
- Bore x stroke
- 45.0 x 40.8 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- MEDJ digital EMS
- Lubrication system
- Mixture oil lubrication
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multi-disc clutch, Formula hydraulics
Dimensions & weight
- Wheelbase
- 1270 mm
- Seat height
- 750 mm
- Dry weight
- 53.0 kg
- Fuel capacity
- 3.50 litres
- Ground clearance
- 280 mm
Chassis & suspension
- Frame
- 25CrMo4 steel central-tube
- Front suspension
- XACT 43 WP Upside-Down fork, Ø 43 mm
- Rear suspension
- XACT WP mono shock
- Front wheel travel
- 215 mm
- Rear wheel travel
- 270 mm
- Rake (fork angle)
- 25.5°
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 198 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 160 mm
- Front tyre
- 60/100-14
- Rear tyre
- 80/100-12
Other
- Color options
- Orange/white/black
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2003 | 2009 | 2015 | 2021 | 2027 |
|---|---|---|---|---|---|
| Capacity | 65 cc | 65 cc | 65 cc | 65 cc | 65 cc |
| Dry weight | 56 kg | 56 kg | 56 kg | 53 kg | — |
| Seat height | 750 mm | 750 mm | 750 mm | 750 mm | 730 mm |
| Fuel capacity | 3.4 L | 3.3 L | 3.5 L | 3.5 L | — |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the KTM 65 SX?
The 2021 KTM 65 SX has a Capacity of 64.9 ccm (3.96 cubic inches).
How many gears does the KTM 65 SX have?
The 2021 KTM 65 SX has a Gearbox of 6-speed.
How much does the KTM 65 SX weigh?
The 2021 KTM 65 SX has a Dry weight of 53.0 kg (116.8 pounds).
Shop this bike
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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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