Enduro Bikes
2021Beta RR 4T 390
34 fields on record
The 2021 Beta RR 4T 390 is a lightweight enduro motorcycle designed for trail riders and off-road enthusiasts seeking versatility and reliability. Powered by a 385cc liquid-cooled four-stroke single-cylinder engine with advanced fuel injection, it delivers strong low-to-mid-range torque ideal for technical terrain. Known for its nimble handling and durable construction, the RR 4T excels in both competitive enduro racing and recreational off-road riding.
- Capacity
- 385.4 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 107.5 kg
- Seat height
- 940 mm
- Power
- Not on record
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How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's built specifically for technical enduro and trail riding rather than road use or commuting.
- Built for
- It has the character of a lightweight, high-revving dirt weapon that rewards aggressive, active riding over technical terrain.
- Not ideal for
- This is not the bike for riders wanting a comfortable, low, passenger-friendly machine for daily road commuting or long highway touring.
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
- 385.4 ccm
- Engine type
- Single, four-stroke
- Bore x stroke
- 88.0 x 63.4 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- DC-CDI without trembler with variable ignition timing, Kokusan type.
- Valves per cylinder
- 4
- Lubrication system
- 2 oil pumps
- Power
- Not on record - add it
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Clutch
- Wet multi-disc
Dimensions & weight
- Wheelbase
- 1490 mm
- Overall length
- 2180 mm
- Overall width
- 815 mm
- Overall height
- 1270 mm
- Seat height
- 940 mm
- Dry weight
- 107.5 kg
- Fuel capacity
- 9.00 litres
- Ground clearance
- 320 mm
- Reserve fuel capacity
- 3.90 litres
Chassis & suspension
- Frame
- Molybdenum steel with double cradle split above the exhaust port
- Front suspension
- Hydraulic USD fork with ø48mm shaft
- Rear suspension
- Monoshock with progressive compound lever
- Front wheel travel
- 295 mm
- Rear wheel travel
- 290 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Front tyre
- 90/90-21
- Rear tyre
- 140/80-18
Other
- Color options
- Red/white/Black
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 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|
| Capacity | 385 cc | 385 cc | 386 cc | 386 cc |
| Dry weight | 108 kg | 108 kg | 108 kg | 108 kg |
| Seat height | 940 mm | 940 mm | 940 mm | 940 mm |
| Fuel capacity | 9 L | 9 L | 9 L | 9 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 Beta RR 4T 390?
The 2021 Beta RR 4T 390 has a Capacity of 385.4 ccm (23.52 cubic inches).
How many gears does the Beta RR 4T 390 have?
The 2021 Beta RR 4T 390 has a Gearbox of 6-speed.
How much does the Beta RR 4T 390 weigh?
The 2021 Beta RR 4T 390 has a Dry weight of 107.5 kg (237.0 pounds).
Shop this bike
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The 2021 Beta RR 4T 390 is a versatile and reliable motorcycle that offers strong performance and handling. With its 390cc engine, it provides a great balance of power and agility, making it suitable for a variety of riding environments. The bike is well-built and designed to withstand off-road challenges, making it a great choice for riders who enjoy exploring rugged terrain. Its comfortable ergonomics and responsive suspension further enhance its overall riding experience, making it a top contender in the mid-size off-road motorcycle segment.
In addition to its impressive performance, the 2021 Beta RR 4T 390 also boasts a stylish and modern design that is sure to turn heads. Its sleek lines and bold color options make it a visually appealing choice for riders who value aesthetics. Whether you're hitting the trails or navigating city streets, this motorcycle offers a winning combination of power, versatility, and style. Overall, the 2021 Beta RR 4T 390 is a standout option for riders looking for a capable and eye-catching off-road motorcycle.
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