| Specification | Data |
|---|---|
| Model Code | JF47 |
| Production Years | 2012 – 2014 |
| Engine Type | Liquid-cooled 4-stroke SOHC (eSP) |
| Engine Oil | SAE 10W-30 JASO MB (0.8 L) |
| Spark Plug | NGK CPR7EA-9 |
| Battery | YTZ7S |
| Tire Size (Front) | 90/90-14 M/C 46P |
| Tire Size (Rear) | 100/90-14 M/C 57P |
Engineering Highlight: The JF47 generation of the Honda PCX 125 is historically significant for being the global launchpad for Honda’s enhanced Smart Power (eSP) technology. This was the first PCX to integrate a brushless ACG starter, which functions as both a starter motor and an alternator, enabling the ultra-smooth ‘Idling Stop’ system that redefined urban fuel efficiency.
Technical Overview
The JF47 replaced the original JF28, bringing with it a suite of low-friction technologies. By offsetting the cylinder, Honda reduced the friction caused by the piston pressing against the cylinder wall during the expansion stroke. Furthermore, the needle-bearing type rocker arm shaft and a lightweight piston contribute to a thermal efficiency that was class-leading at the time of release.
Maintenance & Service Specifications
For the professional technician or the dedicated owner, adhering to the JF47’s specific fluid requirements is critical for longevity. Unlike many motorcycles, the PCX 125 utilizes a dry centrifugal clutch, making the use of JASO MB rated oil essential. Using JASO MA (wet clutch) oil can lead to decreased fuel efficiency due to higher friction modifiers.
- Oil Change: 0.8 Liters of SAE 10W-30 JASO MB.
- Ignition: The NGK CPR7EA-9 should be gapped to 0.8–0.9 mm.
- Electrical: The YTZ7S battery is required to support the high-amperage demands of the ACG starter system.
Chassis & Handling
The JF47 maintains a nimble 1,315mm wheelbase, making it an ideal lane-splitter. To maintain the intended handling characteristics, tire pressures must be checked weekly. The factory recommended pressure is 2.00 bar (29 psi) for the front and 2.25 bar (33 psi) for the rear. Under-inflation significantly impacts the life of the 14-inch IRC or Michelin tires commonly fitted to this model.
FAQ
What is the spark plug gap for the JF47?
The NGK CPR7EA-9 requires a gap of 0.8mm to 0.9mm for optimal combustion.
Can I use 10W-40 oil?
While 10W-40 can be used in warmer climates, Honda specifically recommends 10W-30 JASO MB to maximize the fuel-saving benefits of the eSP engine architecture.
How often should I change the air filter?
Under standard conditions, the viscous paper element should be replaced every 16,000 km (10,000 miles), but more frequent checks are advised in dusty urban environments.