Honda Forza 350 (NSS350) — OEM Fluid, Tire Pressure & Maintenance Specs
330cc Liquid-Cooled Single-Cylinder SOHC 4-Valve eSP+ (Dry CVT + HSTC) · Source: Honda Forza 350 (NSS350) Official Owner’s Manual Technical Specifications
According to the Honda Forza 350 (NSS350) Official Owner’s Manual Technical Specifications, the 2021–Present Honda Forza 350 (NSS350) (chassis NF10/NF12/NSS350A) requires 1.3 L (1.37 US qt) of SAE 10W-30 (JASO MB, API SG or higher) engine oil for a drain-only change and 1.5 L (1.59 US qt) with filter service (15410-MCJ-000 / HF204). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (120/70-15 M/C 56P) and 225 kPa / 2.25 bar / 33 PSI rear (140/70-14 M/C 68P), paired with 1× NGK LMAR8L-9 spark plug(s) and a YTZ10S / FTZ10S battery.
Drain only: 1.3 L (1.37 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~351 km (218 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-30 (Alt: SAE 10W-40) · JASO MB · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.3 L (1.37 US qt) • With filter/strainer: 1.5 L (1.59 US qt) • Complete dry overhaul: 1.8 L (1.90 US qt) |
| OEM Oil Filter Code & Type | 15410-MCJ-000 / HF204 |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 25 N·m (18.4 lb-ft / 2.55 kgf·m) — Use fresh crush washer |
| Final Drive / Gear Oil | 170 ml (0.17 L) — SAE 10W-30 JASO MB (170 ml drain) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70-15 M/C 56P · Rear: 140/70-14 M/C 68P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8L-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ10S / FTZ10S (12V 8.6Ah MF AGM) |
| Final Drive Maintenance | Honda OEM CVT V-Belt — Replace every 24,000 km (V-BELT indicator interval) |
| Brake Fluid & Coolant | DOT 4 · Pro Honda HP Silicate-Free Premixed Coolant |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 330 cc · 29.2 hp @ 7,500 rpm · 31.5 N·m (23.2 lb-ft) @ 5,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 780 mm (30.7 in) · 184 kg (406 lbs) |
| Fuel Tank & Est. Real-World Range | 11.7 L (3.1 US gal) · ~30 km/L → ~351 km (218 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 12,000 km / 12,000 km • Air Filter / Spark Plug: 18,000 km / 24,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
In 2021, the Forza 350 (NF10) replaced the 279cc Forza 300 (NF08), introducing the 330cc eSP+ engine with an external spin-on oil filter. The 2023–2025 NF12 facelift adds TFT instrumentation while keeping identical fluid and consumable specs.
Oil & Clutch Mechanical Engineering Note
Unlike the wet-clutch X-ADV 750 or TMAX 560, the Forza 350 uses a dry centrifugal CVT clutch and explicitly calls for SAE 10W-30 JASO MB scooter oil, plus an automotive-style spin-on oil filter cartridge (HF204 / 15410-MCJ-000).
Garage Wrenching Gotchas
- Lubricate the spin-on oil filter O-ring and tighten to 26 N·m; over-tightening makes removal painful next to the exhaust header.
- The YTZ10S battery sits behind the rear under-seat trunk panel; routing a smart-charger pigtail saves panel disassembly during winter storage.
5. Frequently Asked Questions (FAQ)
What is the Honda Forza 350 engine oil capacity with and without filter change?
The Honda Forza 350 requires 1.3 L (1.4 US qt) for an oil-only drain, and 1.5 L (1.6 US qt) when replacing the spin-on oil filter.
Why does the Forza 350 feel tall despite its 780 mm seat height?
Although the Forza 350 lists a 780 mm seat height (15 mm lower than the XMAX 300), its wide under-seat helmet bay splays the rider’s thighs outward, creating an effective inseam reach closer to an 805 mm standard motorcycle.
What are the OEM tire sizes and cold pressures for the Forza 350?
Stock tires are 120/70-15 front at 200 kPa (29 PSI) and 140/70-14 rear at 225 kPa (33 PSI), measured cold.