Yamaha PG-1 115 (Scrambler Underbone) — OEM Fluid, Tire Pressure & Maintenance Specs
114cc Air-Cooled Horizontal Single SOHC 2-Valve FI (4-Speed Semi-Auto) · Source: Yamaha PG-1 115 (Scrambler Underbone) (2024–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha PG-1 115 (Scrambler Underbone) (2024–Present) Official Owner’s Manual Maintenance Specifications, the 2024–Present Yamaha PG-1 115 (Scrambler Underbone) (chassis BJM/BPN) requires 0.8 L (0.85 US qt) of SAE 10W-40 (JASO MA2, API SG or higher) engine oil for a drain-only change and 0.85 L (0.90 US qt) with filter service (1S7-E3440-00 / HF141). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (90/100-16M/C 51P) and 200 kPa / 2.00 bar / 29 PSI rear (90/100-16M/C 51P), paired with 1× NGK CR6HSA spark plug(s) and a YTZ5S battery.
Drain only: 0.8 L (0.85 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~275 km (171 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Centrifugal Semi-Auto Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 · JASO MA2 · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.8 L (0.85 US qt) • With filter/strainer: 0.85 L (0.90 US qt) • Complete dry overhaul: 1 L (1.06 US qt) |
| OEM Oil Filter Code & Type | 1S7-E3440-00 / HF141 |
| 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 |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/100-16M/C 51P · Rear: 90/100-16M/C 51P (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK CR6HSA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ5S (12V 3.5Ah MF AGM) |
| Final Drive Maintenance | 428 Drive Chain — Maintain 20–30 mm slack and lubricate regularly |
| Brake Fluid & Coolant | DOT 4 · Air-Cooled Horizontal Single Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 114 cc · 9 hp @ 7,000 rpm · 9.5 N·m (7.0 lb-ft) @ 5,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 795 mm (31.3 in) · 107 kg (236 lbs) |
| Fuel Tank & Est. Real-World Range | 5.1 L (1.3 US gal) · ~54 km/L → ~275 km (171 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 3,000 km / 6,000 km • Air Filter / Spark Plug: 12,000 km / 9,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Launched for 2024 as an outdoor scrambler underbone, the PG-1 pairs a full dual-triple-clamp H-bar telescopic fork and 16-inch knobby tube tires with a 4-speed semi-auto gearbox.
Oil & Clutch Mechanical Engineering Note
Because its leverless 4-speed centrifugal clutch runs submerged in crankcase oil, strictly use SAE 10W-40 JASO MA2 oil (0.85 L with paper filter HF141), never JASO MB.