| Component | Specification |
|---|---|
| Model / Type | BMW R 100 – 0247 |
| Production Years | 1986-1996 |
| Engine Oil | SAE 20W-50 Mineral (2.5 L) |
| Tire Size (F/R) | F: 90/90 – 18 51H / R: 120/90 – 18 65H |
| Tire Pressure (F/R) | F: 32-36 psi / R: 36-39 psi |
| Battery Type | 53030 |
| Spark Plugs | Bosch W 7 DC / NGK BP6ES |
The BMW R 100 (Type 247) holds a unique position in motorcycling history: it is the bike that refused to die. Originally slated for replacement by the K-series “Flying Brick,” overwhelming demand from BMW purists forced the factory to resume production of the large-displacement air-cooled boxer in 1986. This “resurrection” era resulted in some of the most refined and reliable Airheads ever built.
Engineering Overview
The 0247 designation refers to the legendary 980cc overhead valve (OHV) flat-twin engine. During the 1986-1996 production cycle, BMW focused on improving the chassis and emissions rather than raw power. These models typically featured the Monolever or later Paralever rear suspension systems, significantly reducing the “shaft-jacking” effect common in earlier shaft-driven motorcycles.
Maintenance Essentials
As the Editor-in-Chief of MotoSpecsLab, I emphasize that the longevity of the Type 247 depends entirely on adhering to classic mineral-based lubrication schedules. Modern synthetic oils are often too thin for the tolerances of these vintage air-cooled seals.
1. Lubrication System
The R 100 requires 2.5 Liters of SAE 20W-50 Mineral oil. Mineral oil is critical for heat dissipation in the boxer cylinders and provides the necessary film strength for the pushrod valvetrain. Avoid friction-modified automotive oils that may interfere with the dry clutch if seals fail.
2. Ignition and Electrical
The electrical system relies on the robust 53030 battery. For optimal combustion, we recommend Bosch W 7 DC or NGK BP6ES spark plugs. Given the age of these machines, checking the spark plug gap and ensuring the heavy-duty battery leads are corrosion-free is a primary maintenance task.
3. Chassis and Tires
Handling precision is dictated by tire choice and pressure. The R 100 utilizes an 18-inch wheel set (90/90-18 front, 120/90-18 rear). To maintain the classic “neutral” steering feel, we recommend 2.2 bar (32 psi) in the front and 2.5 bar (36 psi) in the rear for solo riding. Increase to 2.5/2.7 bar respectively when carrying luggage or a passenger.
Verdict
The 1986-1996 BMW R 100 represents the pinnacle of the traditional boxer era. It offers a tactile, mechanical riding experience that modern bikes cannot replicate. With simple tools and a strict adherence to the specifications provided above, these machines are easily capable of exceeding 200,000 miles.