Royal Enfield Hunter 350 (J-Series) — OEM Fluid, Tire Pressure & Maintenance Specs
349cc Air/Oil-Cooled Single-Cylinder SOHC 2-Valve Long-Stroke J-Series (Counterbalanced) · Source: Royal Enfield Hunter 350 (J1C) Official Owner’s Manual Maintenance Specifications
According to the Royal Enfield Hunter 350 (J1C) Official Owner’s Manual Maintenance Specifications, the 2022–Present Royal Enfield Hunter 350 (J-Series) (chassis ME3J1C/J1C) requires 1.55 L (1.64 US qt) of SAE 15W-50 (JASO MA2, API SL or higher Semi-Synthetic) engine oil for a drain-only change and 1.7 L (1.80 US qt) with filter service (1570120 / HF511). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (110/70-17 54P) and 220 kPa / 2.20 bar / 32 PSI rear (140/70-17 66P), paired with 1× Bosch YR7MES spark plug(s) and a YTZ9-BS / 12V 8Ah VRLA battery.
Drain only: 1.55 L (1.64 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 or higher Semi-Synthetic |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.55 L (1.64 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 | 1570120 / HF511 |
| 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 | 25 N·m (18.4 lb-ft / 2.55 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/70-17 54P · Rear: 140/70-17 66P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 220 kPa / 2.20 bar / 32 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 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 | YTZ9-BS / 12V 8Ah VRLA (12V 8.0Ah Sealed MF VRLA) |
| Final Drive Maintenance | 520 O-Ring Sealed Chain (15T/42T, 104 links) — Maintain 25–30 mm slack on centerstand |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant — internal cylinder-head oil cooling gallery) |
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 | 790 mm (31.1 in) · 181 kg (399 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
Built on Royal Enfield’s counterbalanced 349cc J-series engine, the Hunter 350 tightens steering rake and switches to 17-inch tubeless cast alloy wheels front and rear, shaving weight to 181 kg compared to Classic and Meteor 350 siblings.
Oil & Clutch Mechanical Engineering Note
Because engine oil doubles as cylinder-head coolant in the air/oil-cooled J-series single, Royal Enfield mandates shear-stable SAE 15W-50 JASO MA2 oil (1.7 L with the 1570120 paper filter). Note that break-in oil, filter, and valve service is due early at 500 km (300 mi)!
Garage Wrenching Gotchas
- During oil changes, remove both the main magnetic drain bolt AND the two-bolt triangular strainer plate underneath to clean the pickup mesh, and ensure the spring sits correctly behind the right-side paper filter cap.
- Its SOHC 2-valve head uses classic screw-and-locknut tappets (0.08 mm intake / 0.18 mm exhaust cold) rather than shims—making 10,000 km valve checks remarkably fast and DIY-friendly.
5. Frequently Asked Questions (FAQ)
How much engine oil does a Royal Enfield Hunter 350 take on a filter change?
A standard drain with a new 1570120 / HF511 paper oil filter takes 1.70 L (1.80 US qt) of SAE 15W-50 JASO MA2 oil—never pour the full 2.2 L dry-rebuild capacity or you will overfill the sight glass.
Can you plug a flat tire on a Royal Enfield Hunter 350 with a rope plug kit?
Yes! Alloy-wheel Hunter 350 trims (Dapper and Rebel) come standard with 17-inch tubeless tires front and rear, allowing straightforward roadside rope-plug puncture repairs.
What is the recommended cold tire pressure for the Hunter 350?
Cold inflation is 200 kPa (29 PSI) front and 220 kPa (32 PSI) rear for solo riding, raising the rear tire to 250 kPa (36 PSI) when riding two-up.