Suzuki GS 450 E/EU/S/SU (1985–1989) — Specs

Identity

Manufacturer: Suzuki

Model: GS 450 E/EU/S/SU

Category: Motorcycle

Type: Motorcycle

Years: 1985 → 1989

Engine

Displacement (cc): 448

Cylinders: 2

Power (hp): 27

Power (kW): 20

Torque (Nm): 33

Dimensions

Overall length: 2100 mm

Overall width: 790 mm

Overall height: 1140 mm

Wheelbase: 1430 mm

Ground clearance: 160 mm

Weight (kg): 175

Tank (L): 16

Tires

Front tire: 3.00-19

Rear tire: 3.50-18

Front pressure (bar): 2

Rear pressure (bar): 2.3

Drivetrain

Drive chain: 520 chain, 110 links

Sprockets (front / rear): 16 / 45

Ignition

Spark plug: NGK B8ES

Plug gap: 0.7 mm

Fluids & Filters

Engine oil: SAE10W-40

Engine oil (with filter, L): 2.9

Engine oil (without filter, L): 2.8

Oil filter: Hiflofiltro HF133

Air filter: OEM air filter

Brake fluid: DOT 4

Fuel consumption

Estimated range: ~400 km on a full tank (16.0 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 0.03-0.08 mm, exhaust cold 0.03-0.08 mm. Engine oil: oil grade SAE10W-40, 2.9 L with filter change, 2.8 L without filter change. Spark plug: NGK B8ES (gap 0.7 mm). Brake fluid: DOT 4. Chain: 110 links, sprockets 16/45 teeth. Tire pressure: front 2 bar, rear 2.3 bar (cold). Tire size: front 3.00-19, 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: SAE10W-40, 2.9 L (with filter), 2.8 L (without filter)

OEM OEM recommended engine oil (SAE 10W-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 HF133

Premium Hiflofiltro HF133
Premium K&N KN-133

Air filter

Spark plug

Spec: NGK B8ES, gap 0.7 mm

OEM NGK B8ES
Premium NGK BR8EIX
Standard NGK B8ES

Front brake pads

Spec: EBC FA051

Premium EBC FA051

Rear brake pads

Spec: EBC FA051

Premium EBC FA051

Drive chain

Spec: 110 links | Sprockets 16/45 teeth / 110 links

Front tire

Spec: 3.00-19, 2.0 bar

OEM OEM 3.00-19

Rear tire

Spec: 3.50-18, 2.3 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 0.03-0.08 mm
OEM Exhaust clearance: cold 0.03-0.08 mm

Suspension

Spec: 37 mm telescopic fork / L:187ML/R:165ML

OEM Fork: 37 mm telescopic fork
OEM Fork oil grade: L:187ML/R:165ML