| Specification | Data |
|---|---|
| Model Series | Honda NC 750 X/XD (RC72) |
| Production Years | 2014 – 2015 |
| Engine Oil | SAE 10W-30 (JASO T 903 MA) / 3.4 L |
| Tire Dimensions | F: 120/70 ZR 17 / R: 160/60 ZR 17 |
| Tire Pressure | F: 2.5 bar / R: 2.9 bar |
| Battery Type | YTZ14S |
| Spark Plug | NGK IFR6G-11K |
Engineering Highlight: The Honda RC72 generation marked a pivotal moment in the ‘New Concept’ (NC) philosophy. Unlike traditional motorcycles, the NC 750 X was engineered with a 270-degree phase-crankshaft engine derived from the Honda Jazz automotive block. This design prioritizes low-to-mid-range torque and thermal efficiency over high-RPM peak power, resulting in a unique ‘thumping’ character similar to a V-twin, while housing a 21-liter ‘frunk’ (front trunk) where the fuel tank is conventionally located.
Technical Deep Dive: The RC72 Evolution
Released in 2014, the RC72 was the significant evolution of the original NC700 series. By increasing the bore from 73mm to 77mm, Honda bumped the displacement to 745cc. This wasn’t merely for speed; it was to refine the power delivery and improve the experience of the optional Dual Clutch Transmission (DCT). The ‘XD’ variant features the second-generation DCT, which introduced smarter software mapping to prevent premature upshifts during cornering.
Maintenance Guide & Service Intervals
From a workshop perspective, the RC72 is one of the most accessible modern middleweights. To maintain the longevity of the parallel-twin unit, adhering to high-quality lubricant standards is non-negotiable.
- Lubrication: Use 3.4 liters of SAE 10W-30. It must meet JASO T 903 MA standards to ensure the wet clutch (or dual clutches in the XD model) does not slip.
- Ignition: The NGK IFR6G-11K Iridium plugs are specified for their durability and consistent spark under the lean-burn conditions this engine operates in.
- Electrical: The YTZ14S battery provides the high cold-cranking amps required, especially for the DCT models which rely on electrical actuators for gear changes.
Chassis and Handling
The RC72 utilizes a diamond-shaped steel pipe frame. For optimal handling and fuel economy, tire pressures must be strictly maintained at 2.5 bar (Front) and 2.9 bar (Rear). The 120/70 and 160/60 ZR 17 combination offers a wide range of tire choices, from touring-focused rubber to more aggressive sport-touring compounds.
Frequently Asked Questions
Is the DCT reliable on the 2014-2015 models?
Yes, the RC72 featured improved DCT software over the RC63. Regular oil changes are critical for DCT health, as the system uses the engine oil for hydraulic actuation.
Can I use 10W-40 oil instead of 10W-30?
While 10W-40 is common, Honda specifies 10W-30 to maximize fuel efficiency and ensure correct flow rates through the narrow oil passages in the DCT solenoid valves.