Royal Enfield Bullet 350 (J-Series) — OEM Fluid, Tire Pressure & Maintenance Specs
349cc Air/Oil-Cooled Single SOHC 2-Valve (Counterbalanced J-Series) · Source: Royal Enfield Bullet 350 (J-Series) (2023–Present) Official Owner’s Manual Maintenance Specifications
According to the Royal Enfield Bullet 350 (J-Series) (2023–Present) Official Owner’s Manual Maintenance Specifications, the 2023–Present Royal Enfield Bullet 350 (J-Series) (chassis ME3J3A5F/J1B) requires 1.55 L (1.64 US qt) of SAE 15W-50 (JASO MA2, API SL (RE Liquid Gun 15W-50)) 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 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 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 (RE Liquid Gun 15W-50) |
| 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: 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 8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/lubricate regularly |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant) |
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 / 20,000 km • Valve Clearance Check: 10,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Updated onto the counterbalanced SOHC J-Series platform for 2023+, replacing the vibrating pushrod UCE motor while keeping hand-painted Madras tank pinstripes and a one-piece bench seat.
Oil & Clutch Mechanical Engineering Note
Because internal galleries retain ~500 ml on routine drains, refill with ~1.7 L of SAE 15W-50 JASO MA2 semi-synthetic oil (not 2.2 L) when changing paper element 1570120.
Garage Wrenching Gotchas
- Drop the two-bolt bottom strainer plate alongside the main drain plug at every oil change to clean metallic fuzz off the magnetic screen and inspect its large O-ring.
- Verify the inner rubber O-ring and spring behind the right-side oil filter cap stay properly seated and never get tossed out stuck to the old paper cartridge.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Royal Enfield Bullet 350 (J-Series) (2023–Present) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 15W-50 (JASO MA2) at 1.55 L (1.64 US qt) drain-only and 1.7 L (1.80 US qt) with filter (1570120 / HF511).
How do you accurately check the oil level on the Bullet 350 (J-Series), and what are its service intervals?
Hold the motorcycle dead-vertical on level ground 2–3 minutes after warm shutdown and verify the oil sits mid-way between the Upper and Lower marks in the crankcase sight glass—never on the sidestand. Torque the drain plug to 25 N·m with a new crush washer. Factory oil change intervals are every 10,000 km, with valve clearance inspection every 10,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Bullet 350 (J-Series)?
Equipped with 100/90-19 M/C 57P front and 120/80-18 M/C 62P rear tube-type rims (mushroom/string plugs will not seal—carry spare inner tubes), set cold tire pressures to 32 / 32 PSI (220/220 kPa) solo or 32 / 36 PSI loaded. Seat height is 805 mm (31.7 in) at 195 kg wet weight, delivering ~455 km per 13 L tank.