BMW R61
| Manufacturer | BMW |
|---|---|
| Also called | R 61 |
| Production | 1938 - 1941 |
| Class | Classic |
| Engine | two cylinder boxer, four-stroke |
| Bore / Stroke | 70.0mm x 78.0mm |
| Compression ratio | 5.7:1 |
| Top speed | 71 mph (115 km/h) |
| Horse Power | 17.57 HP (13.1 KW) @ 4800RPM |
| Battery | 5.7:1 |
| Transmission | Gear box: 4-speed Final Drive: shaft drive (cardan) |
| Suspension | Front: leading link Rear: twin shock-swingarm |
| Brakes | Front: expanding brake (drum brake). single Rear: expanding brake (drum brake) |
| Front Tire | 3.50-19.00 |
| Rear Tire | 3.50-19.00 |
| Wheelbase | 55.12 inches (1400 mm) |
| Dimensions | L 83.86 inches (2130 mm) W 32.09 inches (815 mm) H 37.8 inches (960 mm) |
| Weight | (dry), 184.0 kg (wet) |
| Fuel capacity | 3.7 Gallon (14.00 Liters) |
| Fuel consumption | 3.50 liters/100 km (28.6 km/l or 67.21 mpg) |
| Manuals | Service Manual |
| Tech Specs · Brochures · Reviews · Ads · Videos | |
The BMW R61 was a two cylinder boxer, four-stroke Classic motorcycle produced by BMW between 1938 and 1941. It could reach a top speed of 71 mph (115 km/h). Claimed horsepower was 17.57 HP (13.1 KW) @ 4800 RPM.
Engine
The engine was a air cooled two cylinder boxer, four-stroke. A 70.0mm bore x 78.0mm stroke result in a displacement of just 600.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).
Drive
The bike has a 4-speed transmission. Power was moderated via the dry-single plate-cable operated.
Chassis
It came with a 3.50-19.00 front tire and a 3.50-19.00 rear tire. Stopping was achieved via expanding brake (drum brake). single in the front and a expanding brake (drum brake) in the rear. The front suspension was a leading link while the rear was equipped with a twin shock-swingarm. The R61 was fitted with a 3.7 Gallon (14.00 Liters) fuel tank. The wheelbase was 55.12 inches (1400 mm) long.
1938 - 1941 BMW R 61
The 1938 BMW R 61 has, at its heart, an air-cooled, four-stroke, 600cc, single vertical cylinder powerhouse paired to a four-speed manual transmission that can produce a claimed 18 horsepower at 4800 rpm. It also comes with a single, sprung seat, wide handlebars, a large headlamp, a rear luggage rack, laced wheels, a telescopic front fork, plunger shocks in the rear, a front drum brake coupled to an external shoe brake at the gearing on cardan shaft and a dry, single plate clutch.