Kawasaki Z 1100 ST (1981–1983) — Specs
Identity
Manufacturer: Kawasaki
Model: Z 1100 ST
Category: Motorcycle
Type: Motorcycle
Years: 1981 → 1983
Engine
Displacement (cc): 1090
Cylinders: 4
Power (hp): 97
Power (kW): 71
Dimensions
Overall length: 2240 mm
Overall width: 870 mm
Overall height: 1280 mm
Wheelbase: 1510 mm
Ground clearance: 150 mm
Weight (kg): 271
Tank (L): 21
Tires
Front pressure (bar): 2.2
Rear pressure (bar): 2.5
Drivetrain
Final drive: Shaft drive
Ignition
Spark plug: NGK BR8ES
Plug gap: 0.8 mm
Fluids & Filters
Engine oil: SAE10W-40, API SG
Engine oil (with filter, L): 3.2
Engine oil (without filter, L): 3
Oil filter: Hiflofiltro HF401
Air filter: Hiflofiltro HFA2906
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~381 km on a full tank (21.0 L)
Service
Battery: OEM battery specification
Service interval (km): 6000
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 6,000 km or 12 months, whichever comes first. Valve clearance check every 24,000 km. Valve clearance — intake cold 0.05-0.15 mm, exhaust cold 0.05-0.15 mm. Engine oil: oil grade SAE10W-40, API SG, 3.2 L with filter change, 3 L without filter change. Spark plug: NGK BR8ES (gap 0.8 mm). Brake fluid: DOT 4. Drive: shaft drive. Tire pressure: front 2.2 bar, rear 2.5 bar (cold). 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, API SG, 3.2 L (with filter), 3.0 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 HF401
- Premium Hiflofiltro HF401
- Premium K&N KN-401
Air filter
Spec: Hiflofiltro HFA2906
- Standard Hiflofiltro HFA2906
Spark plug
Spec: NGK BR8ES, gap 0.8 mm
- OEM NGK BR8ES
- Premium NGK BR8EIX
- Standard NGK BR8ES
Front brake pads
Spec: EBC FA068HH
- Premium EBC FA068HH
Rear brake pads
Spec: EBC FA068HH
- Premium EBC FA068HH
Front tire
Spec: 2.2 bar
Rear tire
Spec: 2.5 bar
Battery
- Premium Yuasa YTZ14S or YTX14-BS (typical 1000-1300cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 6 000 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 0.05-0.15 mm
- OEM Exhaust clearance: cold 0.05-0.15 mm
Suspension
Spec: 38 mm telescopic fork / 300 ml SAE 10W-20
- OEM Fork: 38 mm telescopic fork
- OEM Fork oil grade: 300 ml SAE 10W-20
Drive chain
