| Specification | Detail |
|---|---|
| Production Years | 2008–2015 |
| Engine Type | 1,293 cc Inline-4, Liquid-cooled |
| Oil Specification | SAE 5W-40 (API SL / JASO MA2) |
| Oil Capacity | 3.5 L |
| Tire Size (Front/Rear) | 120/70 ZR 17 / 190/55 ZR 17 |
| Spark Plugs | NGK KR9CI |
| Battery | YTX14-BS |
Engineering Highlight: The Duolever Revolution
The BMW K 1300 S (internal designation 0508) is a masterclass in German mechanical engineering. A unique historical fact that distinguishes this machine is its Duolever front suspension system. Unlike traditional telescopic forks, the Duolever system, based on the Hossack design, separates the steering and braking forces. This allows the motorcycle to maintain its geometry under heavy braking, virtually eliminating ‘nose-dive’ and providing unparalleled stability during high-speed corner entry—a critical feature for a machine capable of exceeding 170 mph.
Technical Review: Performance and Ergonomics
At the heart of the 0508 model is a 1,293cc transverse-mounted inline-four engine, canted forward at 55 degrees to lower the center of gravity. This iteration improved upon its predecessor (the K 1200 S) by increasing torque to 140 Nm and refining the fuel mapping for smoother low-end response. The inclusion of the optional Shift Assistant (Quickshifter) marked one of the first successful applications of the technology on a production sport-touring motorcycle, emphasizing BMW’s commitment to performance-oriented innovation.
Maintenance Guide & Technical Specs
Maintaining the K 1300 S requires precision to ensure the longevity of its high-tolerance components. Below are the critical service parameters for the 0508 series.
Lubrication System
For optimal clutch performance and engine protection, use only SAE 5W-40 oil meeting API SL and JASO MA2 standards. The dry-sump system requires exactly 3.5 liters when changing the filter. Regular monitoring of the oil level via the integrated sight-tube is essential, as these high-performance engines can consume small amounts of oil under aggressive riding conditions.
Chassis and Tires
The K 1300 S is sensitive to tire wear and pressure. The factory-recommended setup is 120/70 ZR 17 for the front and 190/55 ZR 17 for the rear. To maintain the precision of the Duolever system and the Paralever rear end, pressures must be kept strictly at 2.5 bar (36.3 psi) front and 2.9 bar (42.1 psi) rear.
Electrical and Ignition
The 0508 model utilizes the YTX14-BS battery. Given the complexity of the CAN-bus electronics, ensuring a healthy battery is vital to prevent phantom ECU errors. For ignition, NGK KR9CI iridium plugs are the standard, offering the durability required for the engine’s high-compression environment.
Editor’s Verdict
The BMW K 1300 S remains a pinnacle of the ‘Gentleman’s Express’ category. It offers a rare combination of raw power and sophisticated safety features like ESA II (Electronic Suspension Adjustment). For the owner, adherence to the 5W-40 oil spec and precise tire pressures is not merely a suggestion—it is the prerequisite for experiencing the bike’s full engineering potential.