| Quick Specs: Yamaha YZF-R6 S (RJ111/S) | |
|---|---|
| Production Years | 2006-2009 |
| Engine Oil | SAE 10W-40 (JASO MA) – 2.6 Liters |
| Front Tire | 120/70 ZR 17 |
| Rear Tire | 180/55 ZR 17 |
| Tire Pressure (F/R) | 2.5 bar (36 psi) / 2.9 bar (42 psi) |
| Battery Type | GT9B-4 |
| Spark Plug | NGK CR10EK |
A unique engineering highlight of the Yamaha YZF-R6 S (RJ111/S) is its market positioning: it was not a new development, but a deliberate continuation of the 2004-2005 (RJ09) platform. While the flagship R6 moved toward an extreme, high-revving track focus in 2006, the “S” model retained the more street-favorable power curve and conventional telescopic forks, offering a superior balance for real-world ergonomics and mid-range torque.
Technical Engineering Analysis
The RJ111/S designation represents a refined iteration of the second-generation R6. Unlike the peaky 2006+ standard R6, the R6S utilizes 38mm throttle bodies and a slightly longer stroke configuration that favors linear power delivery. This makes it a preferred choice for commuters and sport-touring enthusiasts who demand the R-series DNA without the aggressive physical demands of a pure supersport geometry.
Maintenance Guide
Lubrication System
To maintain the integrity of the high-revving inline-four, MotoSpecsLab recommends SAE 10W-40 motor oil. Ensure the oil meets the JASO MA standard to protect the integrated wet clutch system. The refill capacity is 2.6 Liters when changing the filter. Regular intervals of 6,000 km (4,000 miles) are suggested for optimal performance.
Chassis and Contact Patch
The R6S relies on a standard supersport tire configuration. For optimal handling and heat dissipation, stick to the 120/70 ZR 17 front and 180/55 ZR 17 rear. Maintaining precise pressures of 2.5 bar (36 psi) front and 2.9 bar (42 psi) rear is critical for preventing uneven wear and ensuring stability during high-speed cornering.
Electrical & Ignition
The ignition system utilizes NGK CR10EK dual-ground electrode plugs, which are essential for the high-compression environment of the RJ111 engine. Starting reliability is anchored by the GT9B-4 battery; given the R6S’s age, ensuring the charging system provides 14V+ at 5,000 RPM is a vital maintenance check.
Expert Verdict
The Yamaha YZF-R6 S remains a masterclass in pragmatic engineering. By repurposing a proven chassis and engine, Yamaha created a machine that bridges the gap between a dedicated track tool and a daily rider. For the owner, it offers the mechanical reliability of a matured platform with the aesthetic pedigree of the R-world.