Yamaha Aerox 155 / NVX 155 (VVA) — OEM Fluid, Tire Pressure & Maintenance Specs
155cc Liquid-Cooled Single SOHC 4-Valve Blue Core VVA with SMG · Source: Yamaha Aerox 155 / NVX 155 (VVA) (2021–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha Aerox 155 / NVX 155 (VVA) (2021–Present) Official Owner’s Manual Maintenance Specifications, the 2021–Present Yamaha Aerox 155 / NVX 155 (VVA) (chassis BBP/GDR155/B63) requires 0.9 L (0.95 US qt) of SAE 10W-40 (JASO MB, API SG or higher) engine oil for a drain-only change and 0.9 L (0.95 US qt) with filter service (B65-E3411-00 (Oil Strainer Screen)). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (110/80-14M/C 53P) and 225 kPa / 2.25 bar / 33 PSI rear (140/70-14M/C 62P), paired with 1× NGK CPR8EA-9 spark plug(s) and a YTZ7V / YTZ6V battery.
Drain only: 0.9 L (0.95 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~220 km (137 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 10W-30) · JASO MB · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.9 L (0.95 US qt) • With filter/strainer: 0.9 L (0.95 US qt) • Complete dry overhaul: 1 L (1.06 US qt) |
| OEM Oil Filter Code & Type | B65-E3411-00 (Oil Strainer Screen) |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 150 ml (0.15 L) — SAE 10W-40 JASO MB (150 ml rear reduction gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/80-14M/C 53P · Rear: 140/70-14M/C 62P (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 CPR8EA-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ7V / YTZ6V (12V 6.0Ah MF AGM) |
| Final Drive Maintenance | Dry V-Belt CVT Drive — Inspect/replace V-belt and rollers every 20,000–24,000 km |
| Brake Fluid & Coolant | DOT 4 · Silicate-free ethylene-glycol OAT coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 155 cc · 15.4 hp @ 8,000 rpm · 13.9 N·m (10.3 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 790 mm (31.1 in) · 125 kg (276 lbs) |
| Fuel Tank & Est. Real-World Range | 5.5 L (1.5 US gal) · ~40 km/L → ~220 km (137 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 4,000 km / 8,000 km • Air Filter / Spark Plug: 12,000 km / 8,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Updated for 2021 (chassis BBP) over the 2017–2020 B65 original, Gen 2 Aerox/NVX 155 gained a higher-compression VVA head, SMG starter, and a larger 5.5 L center-tunnel tank.
Oil & Clutch Mechanical Engineering Note
Because the 6,000 rpm VVA cam-switching actuator relies on clean crankcase oil and total sump volume is only 0.9 L, stick to 2,500–3,000 km SAE 10W-40 JASO MB changes.
Garage Wrenching Gotchas
- Inspect the 3-phase stator coupler under the right body panel for terminal fretting or heat discoloration—a known culprit behind Error Code 12 no-start events on SMG units.
- Many Aerox/NVX 155 trims pair a front ABS disc with a mechanical rear drum brake rather than rear disc, so adjust the rear brake rod free-play regularly.
5. Frequently Asked Questions (FAQ)
What are the engine oil and rear hub gear oil capacities for the Yamaha Aerox 155 / NVX 155 (VVA) scooter?
With an isolated dry CVT belt case, the engine requires 0.9 L drain-only or 0.9 L (0.95 US qt) with filter/screen (B65-E3411-00 (Oil Strainer Screen)) of SAE 10W-40 (JASO MB). Service the rear reduction hub separately (final drive 150 ml).
How do you accurately check the oil level on the Aerox 155 / NVX 155 (VVA), and what are its service intervals?
Hold the bike upright on level ground 2–3 minutes after shutdown, wipe the dipstick, and rest it on the filler threads without screwing it in (threading it in reads artificially high and risks oil starvation). Torque the drain plug to 20 N·m with a new crush washer. Factory oil change intervals are every 4,000 km, with valve clearance inspection every 12,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Aerox 155 / NVX 155 (VVA)?
Fitted with 110/80-14M/C 53P front and 140/70-14M/C 62P rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 29 / 33 PSI (200/225 kPa) solo or 29 / 33 PSI loaded. Seat height is 790 mm (31.1 in) at 125 kg wet weight, delivering ~220 km per 5.5 L tank.