Royal Enfield Classic 350 / Meteor 350 (J-Series) — OEM Fluid, Tire Pressure & Maintenance Specs
349cc Air/Oil-Cooled Single SOHC 2-Valve J-Series Counterbalanced (Wet Multi-Plate) · Source: Royal Enfield All-New Classic 350 (J-Series) Official Owner’s Manual
According to the Royal Enfield All-New Classic 350 (J-Series) Official Owner’s Manual, the 2022–Present Royal Enfield Classic 350 / Meteor 350 (J-Series) (chassis J1A/J-Series) requires 1.6 L (1.69 US qt) of SAE 15W-50 (JASO MA2, API SL Semi-Synthetic) engine oil for a drain-only change and 1.7 L (1.80 US qt) with filter service (RE 1570120 / HF168). Standard solo cold tire pressure is 220 kPa / 2.20 bar / 32 PSI front (100/90-19 M/C 57P) and 220 kPa / 2.20 bar / 32 PSI rear (120/80-18 M/C 62P), paired with 1× Bosch YR7MES spark plug(s) and a YTX9-BS / 12V 8Ah VRLA battery.
Drain only: 1.6 L (1.69 US qt)
R 220 kPa (2.20 bar)
Est. Range: ~455 km (283 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 15W-50 · JASO MA2 · API SL Semi-Synthetic |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.6 L (1.69 US qt) • With filter/strainer: 1.7 L (1.80 US qt) • Complete dry overhaul: 2.2 L (2.32 US qt) |
| OEM Oil Filter Code & Type | RE 1570120 / HF168 |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| 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: 100/90-19 M/C 57P · Rear: 120/80-18 M/C 62P (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 220 kPa / 2.20 bar / 32 PSI Rear: 220 kPa / 2.20 bar / 32 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 220 kPa / 2.20 bar / 32 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | Bosch YR7MES × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX9-BS / 12V 8Ah VRLA (12V 8.0Ah MF VRLA) |
| Final Drive Maintenance | 520 O-Ring Chain (104 links) — Slack 25–30 mm |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No coolant — engine oil acts as primary thermal sink) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 349 cc · 20.2 hp @ 6,100 rpm · 27 N·m (19.9 lb-ft) @ 4,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 805 mm (31.7 in) · 195 kg (430 lbs) |
| Fuel Tank & Est. Real-World Range | 13 L (3.4 US gal) · ~35 km/L → ~455 km (283 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 500 km • Engine Oil / Filter: 10,000 km / 10,000 km • Air Filter / Spark Plug: 10,000 km / 10,000 km • Valve Clearance Check: 10,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
2022+ J-Series 350 models (shared across Classic 350, Meteor 350, Hunter 350, and Bullet 350) replaced the old pushrod UCE engine with a counterbalanced SOHC design. First break-in oil & valve check is due at 500 km (300 mi).
Oil & Clutch Mechanical Engineering Note
Because this air/oil-cooled long-stroke single uses internal oil jets for piston cooling, thin 10W-30 oil causes valvetrain clatter—always use SAE 15W-50 JASO MA2 (1.7 L service refill).
Garage Wrenching Gotchas
- Unbolt the 2-bolt oval bottom strainer plate alongside the main drain plug to wipe break-in ferrous paste off the internal magnet.
- Wire-spoke trims (Halcyon, Chrome) use inner tubes, whereas Dark-series cast-alloy wheel trims come factory tubeless.
5. Frequently Asked Questions (FAQ)
Do the Classic 350, Meteor 350, and Hunter 350 use the exact same oil specs?
Yes—all J-Series 350 models share the identical 349cc engine: SAE 15W-50 JASO MA2 oil, 1.7 L service refill with paper filter (2.2 L completely dry).
Does the J-Series Classic 350 use shims or screw-and-locknut valve adjusters?
It uses simple screw-and-locknut rocker adjusters (0.08 mm intake / 0.18 mm exhaust cold)—no cam removal or shim kits required!
What is the cold tire pressure for the Royal Enfield Classic 350?
Cold inflation is 32 PSI (220 kPa) front and 32 PSI (220 kPa) rear solo, rising to 36 PSI (250 kPa) rear with a passenger.