Yamaha Lexi LX 155 (VVA) — OEM Fluid, Tire Pressure & Maintenance Specs
155cc Liquid-Cooled Single SOHC 4-Valve Blue Core VVA (Flat-Floor MAX) · Source: Yamaha Lexi LX 155 (VVA) (2024–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha Lexi LX 155 (VVA) (2024–Present) Official Owner’s Manual Maintenance Specifications, the 2024–Present Yamaha Lexi LX 155 (VVA) (chassis BLS/B65-LX) 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 (90/90-14M/C 46P) and 225 kPa / 2.25 bar / 33 PSI rear (100/90-14M/C 57P), 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: ~181 km (112 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 / 85W-140 (150 ml rear gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-14M/C 46P · Rear: 100/90-14M/C 57P (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 · 14.2 N·m (10.5 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 770 mm (30.3 in) · 118 kg (260 lbs) |
| Fuel Tank & Est. Real-World Range | 4.2 L (1.1 US gal) · ~43 km/L → ~181 km (112 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
Replacing the earlier Lexi 125 in 2024, the Lexi LX 155 upgrades to the latest hydraulic-tensioner 155cc Blue Core VVA engine while keeping a practical flat floorboard.
Oil & Clutch Mechanical Engineering Note
Because its updated 155cc VVA engine uses a hydraulic cam-chain tensioner fed by sump oil, keep its 0.9 L of SAE 10W-40 JASO MB oil clean every 3,000 km.