| Quick Specs: Honda ADV 350 (NF13A/25) | |
|---|---|
| Production Years | 2022–Present |
| Engine Type | 330cc Liquid-cooled 4-stroke SOHC eSP+ |
| Oil Type | SAE 10W-30, JASO MB |
| Battery | YTZ8V (12V-7Ah) |
| Front Tire | 120/70-15M/C 56P (Tubeless) |
| Rear Tire | 140/70-14M/C 62P (Tubeless) |
The Honda ADV 350 (NF13A/25) represents a significant milestone in the “City-Adventure” segment. While many perceive it as a dressed-up Forza, its engineering pedigree is unique. A little-known fact regarding its development is that the NF13A chassis was specifically reinforced with high-tensile steel tubing to handle the increased leverage of the 37mm Showa USD (Upside-Down) forks, a feature typically reserved for mid-capacity motorcycles rather than scooters.
Engineering Highlight: The eSP+ Powertrain
At the heart of the ADV 350 is the enhanced Smart Power+ (eSP+) engine. This unit utilizes a low-friction design, incorporating an offset cylinder and a roller rocker arm for the valve train. For the NF13A generation, Honda engineers optimized the intake and exhaust paths to provide a broader torque curve compared to the Forza 350, ensuring the ADV 350 maintains its composure on light gravel paths and steep urban inclines.
Maintenance Specifications
Lubrication System
To maintain the longevity of the eSP+ unit, strict adherence to oil specifications is mandatory. The ADV 350 requires SAE 10W-30 oil meeting the JASO MB standard. Unlike many motorcycles that use JASO MA (wet clutch), the ADV 350’s CVT transmission necessitates the friction-reducing properties of MB oil.
- Drain only: 1.3 Liters
- With Filter Change: 1.5 Liters
- Dry Engine: 1.8 Liters
Ignition & Electrical
The system relies on a high-efficiency NGK LMAR8L-9 spark plug. Proper gapping is critical for the start-stop system (where applicable) and fuel efficiency; the gap should be maintained between 0.8–0.9 mm. The electrical load is managed by a YTZ8V battery, which is essential for powering the Smart Key system and the LED lighting array.
Chassis & Road Contact
The ADV 350 utilizes a staggered wheel setup (15-inch front/14-inch rear) to balance high-speed stability with low-speed agility. For optimal safety and fuel economy, tire pressures must be monitored closely:
- Front: 2.0 bar (29 psi)
- Rear: 2.3 bar (33 psi) for solo riding; 2.5 bar (36 psi) when carrying a passenger.
Maintenance FAQ
What is the recommended spark plug gap?
The gap should be set to 0.8–0.9 mm using a wire-type feeler gauge.
Can I use JASO MA oil?
No. The Honda ADV 350 requires JASO MB oil. Using JASO MA may lead to decreased fuel efficiency and increased internal friction.