BMW R39 Specs (Top Speed | Horsepower | Weight)

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The BMW R39 motorcycle specifications include a 247 cc (15.07 cu in) engine, power of 6 hp (4.4 kW) @ 4,000 rpm, a 3-speed gearbox, and a listed weight of 110 kg (242.5 lb).

Key specifications

1926-1927Model years
247 ccDisplacement
6 hpPower
110 kgWet weight
Model years covered
19261927

Year-specific specification changes

No material specification changes from the 1926 baseline were found in the available data.

How the BMW R39 compares

This compares the motorcycle with all BMW models in this specifications database. The blue marker is this model and the grey line is the BMW database average.

Engine power6 hp
Low 12 hpAverage 81.6 hpHigh 193 hp

About 93% lower than the BMW database average. Around the 1st percentile across BMW models.

Displacement247 cc
Low 247 ccAverage 909 ccHigh 1,649 cc

About 73% lower than the BMW database average. Around the 4th percentile across BMW models.

Wet weight110 kg
Low 130 kgAverage 226.7 kgHigh 364 kg

About 51% lighter than the BMW database average. Around the 1st percentile across BMW models.

This model BMW database average

BMW database percentile rankings

Percentiles show where this motorcycle sits across the BMW specifications database. They are descriptive database rankings, not performance ratings.

Engine power1st

6 hp — more powerful than about 1% of BMW models with power data.

Displacement4th

247 cc — larger displacement than about 4% of BMW models.

Wet weight1st

110 kg — heavier than about 1% of BMW models, or lighter than about 99%.

Dimensions compared with BMW average

Each measurement is compared with the average value across BMW models where that dimension is available.

Overall length2,050 mm
This bike

2,050

BMW avg

2,193

7% below average.

Overall width800 mm
This bike

800

BMW avg

877

9% below average.

Overall height950 mm
This bike

950

BMW avg

1,199

21% below average.

Mechanical overview

Engine layout snapshot

Single cylinder, four-stroke • 247 cc • Air cooled • 6 hp
Chassis snapshot

3-speed • Shaft drive (cardan) (final drive) • 3.5-27 front / 3.5-27 rear

Additional useful specifications

Front tire size 3.5-27
Rear tire size 3.5-27
Power-to-weight ratio 0.055 hp/kg
Power-to-weight 54.5 hp/tonne
Specific power 24.3 hp/L
Bore/stroke ratio 1.00:1 (Square)

Engine specifications

Engine type Single cylinder, four-stroke
Displacement 247 cc (15.07 cu in)
Power 6 hp (4.4 kW) @ 4,000 rpm
Bore × stroke 68.0 x 68 mm (2.7 x 2.7 inches)
Compression ratio 6.1:1
Cooling system Air
Fuel system Carburettor. 20mm BMW Spezial
Fuel control Overhead Valves (OHV)
Starter Kick
Lubrication Wet sump

Transmission and drivetrain

Gearbox 3-speed
Final drive Shaft drive (cardan) (final drive)
Clutch Dry-single plate-cable operated

Chassis and suspension

Frame Steel doble cradle
Front suspension Leading link
Rear suspension Rigid

Brakes, wheels and tires

Front brakes Expanding brake (drum brake)
Front tire 3.5-27
Rear tire 3.5-27

Dimensions and weight

Wet weight 110 kg (242.5 lb)
Overall length 2,050 mm (80.7 inches)
Overall width 800 mm (31.5 inches)
Overall height 950 mm (37.4 inches)

Performance

Top speed 100.0 km/h (62.1 mph)

Other specifications

Seat Single seat

Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from BMW models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official BMW information before relying on them. Visit the official BMW website.

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