Royal Enfield Bullet 350 EFI (UCE) Maintenance

This is the maintenance schedule and service intervals for the Royal Enfield Bullet 350, one of the motorcycles that is part of Royal Enfield’s legacy since the very beginning. This version Royal Enfield Bullet 350 is also known as the Bullet 350 EFI, or Bullet 350 BSVI or BS6, as it conforms to India’s latest emissions standards.

You may be looking for the maintenance schedule of the previous carburettor-fed Royal Enfield Bullet 350, the BSIV (BS4).

The Bullet 350 EFI also comes in 350 ES form (with an electric starter). Maintenance for both is the same.

This maintenance schedule is for the most recent model of Bullet 350 using the “Unit Construction Engine” (built since 2009) and with fuel injection (2020+). The Bullet 350 EFI uses a fuel-injected 346cc engine that makes a peak of 14 kW (19 hp) @ 5,250 rpm, and peak torque of 28 Nm (20 ft-lb) @ 4,000 rpm.

The Royal Enfield Bullet 350 EFI was sold alongside its bigger brother the Bullet 500 for a while, but after that was discontinued (in favour of the 650 Twins), the Bullet 350 EFI is the only Bullet remaining.

Royal Enfield Bullet 350 EFI in crowded market — Royal Enfield Bullet 350 EFI (Photo from Royal Enfield)

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Maintenance schedule for the Royal Enfield Bullet 350 EFI

Like a few other Royal Enfield motorcycles, the Bullet 350 EFI has free service in a few markets up to 18 months, and quite a large warranty period (up to 3 years).

Beyond that, the maintenance schedule is below. It’s quite similar to the maintenance schedule for the Bullet 500 fundamentally, but the line items are different.

You can do a lot of the maintenance below with the on-board toolkit… and YouTube.

Notes:

Beyond 50,000 km (the end of the table below), keep doing your own service after that period in the same pattern shown.
The manual for the Bullet 350 does not mention checking valve clearance, but the manual and maintenance schedule for the Bullet 500 recommends inspecting/adjusting every 5,000 km.
You may also wish to inspect and lubricate the swingarm pivot bush and spacer every 5,000 km (not included in schedule, but it was in the BSIV which had an identical chassis)
If you ride in unusually wet, muddy, or dusty conditions, then check, adjust, and lubricate everything more frequently (especially the chain, air filter, oil/oil filter).

Legend

I = Inspect (Clean, Adjust, Lubricate, or Replace as necessary)
A = Adjust
C = Clean
L = Lubricate
R = Replace
I/A/R = Inspect/Adjust/Replace if necessary.

Kms (x 1000)		0.5	5	10	15	20	25	30	35	40	45	50
Months	Notes	1.5	6	12	18	24	30	36	42	48	54	60
Engine Oil (#)	Check level at every 1000 Kms or earlier as required	R	I	R	I	R	I	R	I	R	I	R
Engine Oil Filter Element (#)		R		R		R		R		R		R
Engine oil sump filter (oil retainer)		C		C		C		C		C		C
Spark plug		C&A	C&A	C&A	R	C&A	C&A	R	C&A	C&A	R	C&A
Magnetic drain plug under gear box and secondary drain plug under crankshaft in crankcase right		C		C		C		C		C		C
HT leads for crack/ damage		I	I	I	I	I	I	I	I	I	I	I
Fuel hose & clip		I	I	I	I	I	I	I	I	R	I	I
Accelerator cable free play	Adjust every 5000 km or earlier as required
Rubber Hose, air filter to throttle body		I	I	I	I	I	I	I	I	R	I	I
Rubber hose, inlet manifold/ adaptor		I	I	I	I	I	I	I	I	R	I	I
Evaporative emission equipment rubber hoses		I	I	I	I	I	I	I	I	R	I	I
Air filter paper element	Clean/ replace more frequently if used in dusty conditions	C	C	R	C	R	C	R	C	R	C	R
Clutch Cable/ lever free play	Adjust every 1000 Kms or earlier as required
Rear brake pedal pivot		L	L	L	L	L	L	L	L	L	L	L
Battery terminals (apply petroleum jelly)		C	C	C	C	C	C	C	C	C	C	C
Earth wire eyelet contact		I	I	I	I	I	I	I	I	I	I	I
Front fork oil leak		I	I	I	I	R	I	I	I	R	I	I
Rear wheel drive chain	Clean, lubricate every 1000 km; adjust every 5000 km or earlier as required	I&A
Steering ball races play	Inspect & if required lubricate every 5000 km or earlier as required. Replace if necessary	I&A
Spoke tightness/ wheel rim run out front and rear		I	I	I	I	I	I	I	I	I	I	I
Swing arm pivot bush & spacer	Inspect/lubricate if required every 5000 km or earlier. Replace if necessary		I/L/R	I/L/R	I/L/R	I/L/R	I/L/R	I/L/R	I/L/R	I/L/R	I/L/R	I/L/R
Rear wheel cush rubbers		I	I	I	I	R	I	I	I	R	I	I
Tyre wear pattern front and rear		I	I	I	I	I	I	I	I	I	I	I
Brake fluid level – front and rear		I	I	I	I	R	I	I	I	R	I	I
Pivot – side stand, centre stand, pillion foot rest		L	L	L	L	L	L	L	L	L	L	L
Throttle body	Clean with microfibre cloth every. Do not use throttle body cleaner or any solvent or alcohol-based liquid. Clean every 10K km or earlier as required.			C		C		C		C		C
Front brake hose and banjo bolt		I	I	I	I	I	I	I	I	I	I	I
Hand levers & kick starter lever pivot	Lubricate every 1000 kms or earlier as required
Clutch cable		I&A	I&A	I&A	I&A	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R
Accelerator cable		I&A	I&A	I&A	I&A	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R	I&A/R
Starter motor & starter relay connections		I	I	I	I	I	I	I	I	I	I	I
Brake pads – front		I	I	I	I	I	I	I	I	I	I	I
Brake shoe – rear		I	I	I	I	I	I	I	I	I	I	I
Rear brake cam		I	I	I	I	I	I	I	I	I	I	I
Side stand switch operation		I	I	I	I	I	I	I	I	I	I	I
Rear brake pedal free play	Adjust every 1000 km or earlier as required											–

Royal Enfield Bullet 350 EFI Maintenance Schedule

Tyre sizes and pressures for the Royal Enfield Bullet 350 EFI

Below are the tyre sizes and pressures for the Royal Enfield Bullet 350 EFI. The Bullet 350 carries tubed tyres for its spoked rims.

Wheel	Tyre size	Tyre pressure (cold)
Front	3.25×19 4PR	20 psi / 1.41 bar (22 psi/1.55 bar with pillion)
Rear	3.25×19 4/6 PR	30 psi / 2.11 bar (32 psi/2.25 bar with pillion)

Royal Enfield Bullet 350 tyre sizes and pressures

About the Royal Enfield Bullet 350 EFI

The Royal Enfield Bullet 350 is a classic bike in Royal Enfield’s line-up. The Bullet brand is synonymous with the Royal Enfield one as the two have co-oxisted since the beginning. The Bullet was the first model of the then-British (now Indian) manufacturer, and in its original forms was used all over the world as commuter bikes and army bikes.

Since 1932 and the first Bullet motorcycles, Royal Enfield has gone through a lot of change. Royal Enfield as a brand was re-invigorated in the late 90s and early 2000s, and since BSVI mandated it, Royal Enfield has been producing the Bullet 350 and 500 with a more modern fuel-injected design, to help it conform with European emissions and safety standards.

The Royal Enfield Bullet 350 EFI is based around a 346 cc fuel-injected single-cylinder 4-stroke engine. It has a bore and stroke of 70mm x 90mm, and a very mild compression ratio of 8.5:1 — a design feature to keep it low-stress (as it’s an air-cooled engine) and capable of using pretty much any gas you can find.

The Bullet 350 EFI’s engine doesn’t make a lot of power (14 kW / 19 hp @ 5,250 rpm), but torque peaks (albeit with a low number) at 4,000 rpm, giving the Bullet 350 a torque-forward power curve that’s very suitable for low-speed commuting or travelling around the country — taking the scenic route.

The Royal Enfield Bullet 350 EFI is sold alongside the Meteor 350, which while seeming similar just from the displacement, is actually a different, newer motorcycle. The Meteor 350 has a 349cc air-cooled single (vs the Bullet 350’s 346cc air-cooled single) with different power characteristics. The Meteor 350 also has better suspension, nicer design, front and rear disc brakes, and a higher price tag.

The latest Royal Enfield Bullet 350 EFI has a front 280mm disc with a 2-piston caliper. Basic braking, but since the little Bullet will never go that fast, it is adequate for pulling up its sub-200kg weight. The rear brake is still a drum brake. ABS is dual channel.