| Specification | Value |
|---|---|
| Model Series | RH07 (2015 – 2018) |
| Engine Oil | Yamalube 10W-40 / 15W-50 (2.1 L) |
| Tire Size (Front) | 110/70-17 M/C 54H |
| Tire Size (Rear) | 140/70-17 M/C 66H |
| Tire Pressure (F/R) | 29 psi / 33 psi |
| Battery Type | GTZ8V |
| Spark Plug | NGK CR8E |
The Yamaha YZF-R3 RH07 represents a pivotal moment in the ‘lightweight supersport’ category. Unlike many of its competitors that utilized single-cylinder configurations or adapted commuter platforms, the RH07 was engineered from the ground up to mirror the ‘R-Series’ DNA. A unique engineering highlight of this specific generation is the use of offset cylinders—a design choice typically reserved for high-performance liter-bikes—to reduce friction losses during the combustion stroke, maximizing the efficiency of its 321cc parallel-twin heart.
Mechanical Integrity & Performance
The RH07 engine utilizes a 180-degree crank design, providing a high-revving character that remains remarkably smooth thanks to a primary balancer. To maintain the thermal efficiency of this high-compression unit, Yamaha specifies strictly regulated lubricants. For standard operating temperatures, 10W-40 is the baseline, while 15W-50 is recommended for sustained high-load or track use to maintain film strength.
Maintenance Protocols
Lubrication System
The oil capacity is 2.1 Liters when changing the filter. Owners should ensure the oil meets JASO MA standards to prevent clutch slippage, as the RH07 employs a wet multi-plate clutch system that shares the engine lubricant.
Ignition and Electrical
The NGK CR8E spark plug is the heart of the combustion cycle. We recommend inspection every 12,000 km. Electrical stability is managed by the GTZ8V battery; given the high-compression nature of the twin-cylinder engine, maintaining a healthy CCA (Cold Cranking Amps) is vital for reliable starting.
Chassis & Handling Dynamics
The RH07’s agility is highly dependent on tire profile and pressure. The factory fitment (110/70-17 Front and 140/70-17 Rear) is designed for a neutral tip-in. Deviating from the recommended 2.0 bar (front) and 2.25 bar (rear) significantly alters the contact patch, often leading to ‘heavy’ steering if under-inflated.
FAQ
What oil should I use for my R3?
Yamalube 10W-40 or 15W-50 meeting API SG and JASO MA specifications is required.
What is the correct tire pressure?
For optimal handling, maintain 29 psi in the front and 33 psi in the rear.
Which spark plug is compatible?
The factory-recommended spark plug is the NGK CR8E.