Yamaha XS 400 SE (1980–1982) — Specs

Identity

Manufacturer: Yamaha

Model: XS 400 SE

Category: Motorcycle

Type: Motorcycle

Years: 1980 → 1982

Engine

Displacement (cc): 386

Cylinders: 2

Power (hp): 27

Power (kW): 20

Torque (Nm): 31

Dimensions

Overall length: 2100 mm

Overall width: 790 mm

Overall height: 1140 mm

Wheelbase: 1430 mm

Ground clearance: 160 mm

Weight (kg): 182

Tank (L): 14

Tires

Front tire: 3.00-18

Rear tire: 3.50-18

Front pressure (bar): 1.8

Rear pressure (bar): 2

Drivetrain

Drive chain: 520 chain, 102 links

Sprockets (front / rear): 16 / 36

Ignition

Spark plug: NGK BP7ES

Plug gap: 0.8 mm

Fluids & Filters

Engine oil: SAE20W-40, API SE

Engine oil (with filter, L): 2

Engine oil (without filter, L): 1.8

Oil filter: Hiflofiltro HF145

Air filter: OEM air filter

Brake fluid: DOT 4

Fuel consumption

Estimated range: ~350 km on a full tank (14.0 L)

Service

Battery: OEM battery specification

Service interval (km): 10000

Service interval (months): 12

Valve check (km): 24000

Parts and consumables for this motorcycle

Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.

Service notes

Service interval: every 10,000 km or 12 months, whichever comes first. Valve clearance check every 24,000 km. Valve clearance — intake cold 0.08-0.12 mm, exhaust cold 0.16-0.20 mm. Engine oil: oil grade SAE20W-40, API SE, 2 L with filter change, 1.8 L without filter change. Spark plug: NGK BP7ES (gap 0.8 mm). Brake fluid: DOT 4. Chain: 102 links, sprockets 16/36 teeth. Tire pressure: front 1.8 bar, rear 2 bar (cold). Tire size: front 3.00-18, rear 3.50-18. Always confirm critical values with the workshop manual or an authorised dealer.

OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.

Engine oil

Spec: SAE20W-40, API SE, 2.0 L (with filter), 1.8 L (without filter)

OEM OEM recommended engine oil (SAE 20W-40)
Premium Motul 7100 4T (100% Synthetic, Ester)
Premium Motul 5100 4T Technosynthese (Semi-Synthetic)

Which Motul for this bike?

	Motul 7100 4T ✓	Motul 5100 4T
Product	Motul 7100 4T — 100% fully synthetic	Motul 5100 4T — semi-synthetic
Best for	Sport, Naked, Adventure (600cc+), track	Standard, Cruiser, Scooter, daily use
RPM protection	Excellent — ester base, stable under load	Good — for normal riding conditions

Standard Repsol Moto Racing 4T (Synthetic)
Standard Elf Moto 4 Tech (Semi-Synthetic)

Fully Synthetic vs Semi-Synthetic

	Fully Synthetic	Semi-Synthetic
Base oil	100% chemical synthesis (ester or PAO)	Mineral oil + synthetic additives
Heat resistance	Excellent — stable at extreme heat & RPM	Good — suitable for normal temperatures
Cold start	Better — reaches engine faster when cold	Good — adequate for normal climates
Change interval	Longer (up to 10,000 km)	Shorter (5,000–7,000 km typical)
Price	Higher	Lower

Oil filter

Spec: Hiflofiltro HF145

Premium Hiflofiltro HF145
Premium K&N KN-145

Air filter

Spark plug

Spec: NGK BP7ES, gap 0.8 mm

OEM NGK BP7ES
Premium NGK BPR7EIX
Standard NGK BP7ES

Front brake pads

Rear brake pads

Drive chain

Spec: 102 links | Sprockets 16/36 teeth / 102 links

Front tire

Spec: 3.00-18, 1.8 bar

OEM OEM 3.00-18

Rear tire

Spec: 3.50-18, 2.0 bar

OEM OEM 3.50-18

Battery

Premium Yuasa YTX9-BS or YTZ7S (typical 250-500cc)

Brake fluid

Spec: DOT 4

Standard TotalEnergies HBF4

Coolant

Service interval

Spec: 10 000 km / 12 months

OEM Engine oil + oil filter change
OEM Air filter inspection
OEM Spark plug check
OEM Brake fluid replacement: every 2 years

Valve check

Spec: 24 000 km

OEM Intake clearance: cold 0.08-0.12 mm
OEM Exhaust clearance: cold 0.16-0.20 mm

Suspension

Spec: 33 mm telescopic fork / 142 ml SAE 10W-30

OEM Fork: 33 mm telescopic fork
OEM Fork oil grade: 142 ml SAE 10W-30