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2021 BMW G 310R Overview
For 2021, BMW offers the G 310R as a sport motorcycle with 313 cc on tap. The 2021 BMW G 310R is built around a Liquid-cooled single cylinder, four-stroke engine running Double Overhead Cams/Twin Cam (DOHC) valve actuation, a compression ratio of 10.9:1. Out on the road, the G 310R delivers 25 kW @ 9250 rpm of peak power and 28 Nm @ 7500 rpm of torque. Flat out, it's quoted at 143 km/h. In everyday use, the 2021 G 310R tips the scales at 164 kg, carries an 11-litre fuel tank, offers a seat height of 785 mm and spans a 1380 mm wheelbase. That's roughly 30.8 kg lighter than the average sport motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2021 BMW G 310R spec sheet below.
2021 BMW G 310R compared with other bikes in the Sport category
Measured against other bikes in the Sport category in our database (up to 1341 models, one entry per model), the 2021 BMW G 310R comes out as follows.
- With 143 km/h, the G 310R has the joint 92nd lowest top speed of 880 bikes in the Sport category, 35% below the category average of 220 km/h.
- Power-to-weight ratio of 152 W/kg is lower than that of 630 of the other 726 bikes in the Sport category.
- Only 218 of the other 1340 bikes in the Sport category have a lower power output than the 25 kW of the G 310R.
- Narrowing the field to the 40 models within five model years of it, the top speed of 143 km/h is lower than that of 32 of the other 39.
Versus the 2020 model
Compared with the 2020 model, wet weight went up from 158.5 kg to 164 kg (+5.5 kg). Peak power, peak torque, displacement, seat height and top speed are unchanged.
2021 G 310R - Pros & Cons
Strengths
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⚡
Strong power output: Peak output on the G 310R is 25 kW @ 9250 rpm and 28 Nm @ 7500 rpm of torque - strong numbers for what it is.
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🔧
Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.
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🛑
Strong front braking: The disc front brake bites hard and stays consistent - a solid foundation whether it's stock or upgraded with braided lines.
Considerations
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⛽
Modest fuel capacity: An 11-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
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⚙️
Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.
Wear Points & Servicing Notes
Cooling system servicing
With Liquid Cooled, thermal management is largely automatic, but the coolant has a service life of its own - replace it on the manufacturer's interval to protect the water passages and thermostat.
Fuelling & injector care
Fuelling on the G 310R comes from fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.
Valve clearance checks
Valve clearances on Double Overhead Cams/Twin Cam (DOHC)-equipped engines like the G 310R's drift slowly with mileage rather than failing suddenly - sticking to the service interval keeps it a non-issue.
Brake disc and pad wear
Single 300mm disc, 4-piston fixed caliper, radially bolted up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.
Suspension condition on used examples
Suspension duties are handled by 41mm USD telescopic fork up front and Cast aluminium dual swing arm, central spring strut, spring pre-load adjustable at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.
Final drive maintenance
Chain final drive on the G 310R means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.
Frame & chassis check
The Tubular space frame chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.
G 310R - Buying & Maintenance Guide
What to check before buying
A pre-purchase check on the 2021 BMW G 310R with its 313 cc sport should cover the same ground every time: service history, drivetrain condition, and any oil seepage around the casings. This model runs chain final drive, so check chain slack and sprocket tooth profile specifically - a worn sprocket is a cheaper fix now than after it's chewed up the next chain. Now 5 years old, this sport is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Start it from cold if you can - a well-kept G 310R settles to a smooth idle within seconds.
Oil and filter changes
Oil changes are the cheapest insurance you can buy for the G 310R's 313 cc liquid-cooled single cylinder, four-stroke - keep to the manufacturer's interval rather than stretching it. With a 10.9:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Use the viscosity grade the manual specifies, not whatever's on sale.
Fuel system care
Injector systems like the G 310R's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.
Valve clearance service
There's no reliable seat-of-the-pants way to tell if a G 310R's valve clearances are in spec - a light top-end tick is the only real warning sign, and by then some wear has already happened. Service records are the only proof.
2021 BMW G 310R - Frequently Asked Questions
What engine does the 2021 BMW G 310R have?
The 2021 BMW G 310R uses a Liquid-cooled single cylinder, four-stroke engine with 313 cc of displacement. It is liquid cooled.
What is the top speed of the 2021 BMW G 310R?
The 2021 BMW G 310R has a factory-quoted top speed of 143 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.
How much does the 2021 BMW G 310R weigh?
The 2021 BMW G 310R weighs 164 kg. This is the manufacturer's wet figure.
How much power does the 2021 BMW G 310R make?
The 2021 BMW G 310R produces 25 kW @ 9250 rpm of power and 28 Nm @ 7500 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2021 BMW G 310R?
The 2021 BMW G 310R has an 11-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 183-220 km between stops.
Is the 2021 BMW G 310R suitable for shorter riders?
The 2021 BMW G 310R has a seat height of 785 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2021 BMW G 310R have?
The 2021 BMW G 310R uses single 300mm disc, 4-piston fixed caliper, radially bolted at the front and single 240mm disc, single-piston floating caliper at the rear.
What tyre sizes does the 2021 BMW G 310R use?
The 2021 BMW G 310R runs 110/70 R17 front and 150/60 R17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2021 BMW G 310R have?
The 2021 BMW G 310R is fitted with a 6-Speed, constant-mesh transmission.
BMW G 310R Spec Evolution
The BMW G 310R was produced across 8 model years (2016-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.
| Specification |
2016 |
2017 |
2018 |
2019 |
2020 |
2021 |
2022 |
2023 |
| Max Power |
25 kW / 34 hp @ 9500 rpm |
25 kW / 34 hp @ 9500 rpm |
25 kW / 34 hp @ 9500 rpm |
25 kW / 34 hp @ 9500 rpm |
25 kW / 34 hp @ 9500 rpm |
25 kW / 34 hp @ 9250 rpm |
25 kW / 34 hp @ 9250 rpm |
- |
| Wet Weight |
158.5 kg / 349 lbs |
158.5 kg / 349 lbs |
158.5 kg / 349 lbs |
158.5 kg / 349 lbs |
158.5 kg / 349 lbs |
164 kg / 361.5 lbs |
164 kg / 361.5 lbs |
164.2 kg / 362.0 lbs |
| Dry Weight |
- |
148.0 kg / 326.2 lbs |
148.0 kg / 326.2 lbs |
148.0 kg / 326.2 lbs |
158.5 kg / 349.4 lbs |
158.5 kg / 349.4 lbs |
158 kg / 348.3 lbs |
158 kg / 348.3 lbs |
| Engine Detail |
Single cylinder, DOHC, 4 valves |
Single cylinder, DOHC, 4 valves |
Single cylinder, DOHC, 4 valves |
Single cylinder, DOHC, 4 valves |
Single cylinder, DOHC, 4 valves |
Single cylinder, DOHC and cam followers, 4 valves |
Single cylinder, DOHC and cam followers, 4 valves |
- |
| Engine Type |
Single cylinder, four-stroke |
Liquid-cooled single cylinder, four-stroke |
Liquid-cooled single cylinder, four-stroke, backward-canted, 4 valves |
Liquid-cooled single cylinder, four-stroke, backward-canted, 4 valves |
Single cylinder, four-stroke |
Liquid-cooled single cylinder, four-stroke |
Single cylinder, four-stroke |
Single cylinder, four-stroke |
| Top Speed |
145 km/h / 90 mph |
145 km/h / 90 mph |
145 km/h / 90 mph |
145 km/h / 90 mph |
143.0 km/h / 88.9 mph |
143.0 km/h / 88.9 mph |
143.0 km/h / 88.9 mph |
143.0 km/h / 88.9 mph |
| Seat Height |
785 mm / 30.9 in |
785 mm / 30.9 in |
785 mm / 30.9 in |
785 mm / 30.9 in |
785 mm / 30.9 in |
785 mm / 30.9 in OA low seat: 770 mm / 30.3 in OE high seat: 800 mm / 31.4 in |
785 mm / 30.9 in OA low seat: 770 mm / 30.3 in OE high seat: 800 mm / 31.4 in |
785 mm / 30.9 in. |
| Fuel Capacity |
11 Litres / 2.9 US gal |
11.0 L / 2.90 US gal |
11.0 L / 2.91 US gal |
11.0 L / 2.91 US gal |
11 Litres / 2.9 US gal |
11 Litres / 2.9 US gal |
11 Litres / 2.9 US gal |
10.98 litres / 2.90 US gallons |
Key Specifications
Engine
Liquid-cooled single cylinder, four-stroke
Power
25 kW / 34 hp @ 9250 rpm
Torque
28 Nm / 20.7 ft-lb @ 7500 rpm
Top Speed
143.0 km/h / 88.9 mph
Weight
164 kg / 361.5 lbs
Fuel Capacity
11 Litres / 2.9 US gal
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Full 2021 BMW G 310R Specifications
Year
2021
Make
BMW
Model
G 310R
Colours
Pearl White Metallic, Cosmic Black, Racing Red
Make Model
BMW G 310R
Seat Height
785 mm / 30.9 in OA low seat: 770 mm / 30.3 in OE high seat: 800 mm / 31.4 in
Wheelbase
1380 mm / 54.3 in
Height
1080 mm / 42.5 in
Length
2005 mm / 78.9 in
Width
849 mm / 33.4 in
Dry Weight
158.5 kg / 349.4 lbs
Fuel Capacity
11 Litres / 2.9 US gal
Wet Weight
164 kg / 361.5 lbs
CO2
77.3 CO2 g/km. (CO2 - Carbon dioxide emission)
Engine Type
Liquid-cooled single cylinder, four-stroke
Fuel Control
Double Overhead Cams/Twin Cam (DOHC)
Stroke
62.1 mm
Displacement
313 cc / 19.1 cu in
Engine Detail
Single cylinder, DOHC and cam followers, 4 valves
Fuel System
Injection
Bore x Stroke
80 x 62.1 mm
Compression Ratio
10.9:1
Cooling System
Liquid Cooled
Emissions
Closed-loop 3-way catalytic converter, emission standard EU-5
Fuel Consumption
3.33 litres/100 km (30.0 km/l or 70.64 mpg)
Fuel Induction
Electronic fuel injection
Fuel Reserve
1.00 litres / 0.26 US gallons
Starter
Electric
Battery Capacity
12 V / 8 Ah, maintenance-free
Clutch
Multi-disc oil bath (anti-hopping) with self-reinforcement
Final Drive
Endless X-ring chain with shock damping in rear wheel hub
Transmission / Drive
6-Speed, constant-mesh
Frame Type
Tubular space frame
Suspension - Front
41mm USD telescopic fork
Suspension - Rear
Cast aluminium dual swing arm, central spring strut, spring pre-load adjustable
Steering Head Angle
64.9°
Trail
114 mm / 4.48 in
Wheel Travel - Front
140 mm / 5.5 in
Wheel Travel - Rear
131 mm / 5.5 in
Tachometer
Standard (Digital LCD multi-function display)
Alternator
Three-phase alternator with 308 W
Brakes - Front
Single 300mm disc, 4-piston fixed caliper, radially bolted
Brakes - Rear
Single 240mm disc, single-piston floating caliper
ABS
BMW Motorrad ABS
Rims
Cast aluminum wheels
Rims - Front
3.0 x 17
Rims - Rear
4.0 x 17
Tyres - Front
110/70 R17
Tyres - Rear
150/60 R17
Wheels
5-Spoke, cast aluminium
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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