| Specification | Value |
|---|---|
| Model | BMW R NINET /5 – RNINET/5 |
| Production Years | 2019 – 2020 |
| Engine Oil | SAE 5W-40, API SL / JASO MA2 (3.95 L) |
| Tire Size (F/R) | 120/70 ZR 17 / 180/55 ZR 17 |
| Tire Pressure (F/R) | 2.5 bar (36.3 psi) / 2.9 bar (42.1 psi) |
| Battery Type | YTX14-BS |
| Spark Plug | NGK MAR8B-JDS |
Engineering Heritage: The Berlin Spandau Legacy
The BMW R nineT /5 is more than a retro-styled roadster; it is a mechanical tribute to the 50th anniversary of the legendary /5 series. A unique engineering highlight of this specific model is its homage to the 1969 R 75/5, which marked the inaugural production at the BMW Motorrad plant in Berlin-Spandau. Unlike the standard R nineT, the /5 features chrome mirrors, a double-stitched seat with cross-embossing, and a Lupine Blue metallic finish with a smoke effect, directly referencing the aesthetic engineering of the late 60s while utilizing a modern air/oil-cooled boxer engine.
Technical Review: The 1170cc Boxer Heart
At the core of the R nineT /5 lies the iconic 1,170cc air/oil-cooled DOHC flat-twin engine. This powerplant is revered for its characterful torque delivery and lateral vibration, providing 110 hp (81 kW) at 7,750 rpm. From a technical standpoint, the choice of an air-cooled architecture in 2019-2020 allowed for a cleaner aesthetic, free from the plumbing of a radiator, while the integration of modern engine management ensures Euro 4 compliance. The power is delivered via a six-speed claw-shift gearbox and a maintenance-heavy (but rewarding) shaft drive.
Maintenance Guide & Fluid Specifications
To maintain the longevity of the boxer engine, adherence to fluid specifications is critical. The R nineT /5 requires 3.95 liters of SAE 5W-40 oil. It is imperative to use oil that meets API SL or JASO MA2 standards to ensure the dry clutch and internal components are protected against thermal degradation, which is common in air-cooled configurations during low-speed urban riding.
Ignition and Electrical
The ignition system utilizes NGK MAR8B-JDS spark plugs. Given the high-compression nature of the boxer engine, the electrode gap must be checked regularly to prevent misfires. The electrical system is supported by a YTX14-BS battery, providing the necessary cranking amps to turn over the large twin pistons even in cold weather.
Chassis and Handling
The /5 variant utilizes a modular frame concept consisting of a front and three-part rear frame. This allows for significant customization. For optimal handling and safety, the 17-inch wheels must be fitted with 120/70 ZR 17 (front) and 180/55 ZR 17 (rear) tires. MotoSpecsLab recommends maintaining pressures at 2.5 bar (36.3 psi) for the front and 2.9 bar (42.1 psi) for the rear to ensure the contact patch remains stable under the bike’s 219 kg (483 lbs) wet weight.
Frequently Asked Questions (FAQ)
Q: Can I use synthetic oil in my R nineT /5?
A: Yes, provided it meets the SAE 5W-40 viscosity and JASO MA2 specifications. High-quality synthetics are often preferred for their superior thermal stability in air-cooled engines.
Q: How often should I check the shaft drive?
A: While the shaft drive is low maintenance compared to a chain, the oil should be changed every 20,000 km or 2 years, and the splines should be lubricated to prevent corrosion.
Q: What is the benefit of the NGK MAR8B-JDS plug?
A: This specific plug is designed to handle the heat cycles of the BMW air/oil-cooled heads, ensuring consistent combustion and preventing carbon buildup.