| Component | Specification |
|---|---|
| Production Years | 2007–2016 |
| Engine Type | 1,251cc Air-cooled, Inline-4, DOHC |
| Fuel System | Electronic Fuel Injection (EFI) |
| Engine Oil | SAE 10W-40 (JASO MA) – 3.35 Liters |
| Tire Size | F: 120/70 ZR 17 | R: 180/55 ZR 17 |
| Spark Plug | NGK DPR8EA-9 |
| Battery | YTZ14S |
Did you know? The Yamaha XJR 1300 RP19 represents a unique engineering milestone: it was the first XJR to successfully integrate modern Electronic Fuel Injection (EFI) and a 3-way catalytic converter into a legacy air-cooled engine block that traces its DNA back to the late 1970s. This transition allowed Yamaha to meet stringent Euro 3 emissions standards without sacrificing the iconic cooling fins and muscular aesthetic that defined the Japanese Big Four ‘muscle bike’ era.
Technical Engineering Overview
The RP19 generation (2007–2016) brought significant refinements to the XJR platform. Moving away from the Mikuni BS36 carburetors of the RP10, the RP19 utilized a sophisticated fuel injection system and a 4-into-1 exhaust layout with an EXUP (Exhaust Ultimate Power Valve) system. This improved low-to-mid-range torque delivery, making the 1,251cc powerhouse even more tractable for urban riding while maintaining its legendary 108Nm of torque.
Maintenance Guide & Essentials
1. Lubrication System
The air-cooled nature of the RP19 means oil plays a critical role in thermal management. We recommend a high-quality semi-synthetic or full-synthetic SAE 10W-40 oil. The total capacity for an oil and filter change is 3.35 liters. Ensure the oil meets JASO MA standards to protect the wet clutch system.
2. Tires and Handling
To maintain the XJR’s stability, tire pressures must be checked weekly. Use 2.5 bar (36 psi) in the front and 2.9 bar (42 psi) in the rear. These pressures are optimized for the bike’s 245kg wet weight and ensure the Ohlins rear shocks (standard on most RP19 trims) can perform their damping duties effectively.
3. Electrical and Ignition
The RP19 uses the YTZ14S battery. Given the fuel injection system’s reliance on stable voltage, ensure terminals are clean and the charging system is outputting between 14.0V and 14.4V at 5,000 RPM. For ignition, the NGK DPR8EA-9 plugs should be gapped to 0.8–0.9mm.
MotoSpecsLab Verdict
The Yamaha XJR 1300 RP19 is a masterclass in longevity. It offers a visceral, mechanical riding experience that modern liquid-cooled machines cannot replicate. For the owner, it represents a bridge between classic aesthetics and modern reliability. Regular valve clearance checks (every 24,000 miles) and diligent oil changes are the keys to making this engine practically immortal.