BMW K 100 (1983–1990) — Specs
Identity
Manufacturer: BMW
Model: K 100
Category: Motorcycle
Type: Motorcycle
Years: 1983 → 1990
Engine
Displacement (cc): 987
Cylinders: 4
Power (hp): 90
Power (kW): 66
Torque (Nm): 86
Dimensions
Overall length: 2240 mm
Overall width: 870 mm
Overall height: 1280 mm
Wheelbase: 1510 mm
Ground clearance: 150 mm
Weight (kg): 239
Seat height (mm): 810
Tank (L): 22
Tires
Front tire: 120/70-17
Rear tire: 160/60-18
Front pressure (bar): 2.25
Rear pressure (bar): 2.5
Drivetrain
Drive chain: shaft drive
Ignition
Spark plug: NGK D7EA
Plug gap: 0.6-0.7 mm
Fluids & Filters
Engine oil: SAE20W-50, API SF
Engine oil (with filter, L): 3.75
Engine oil (without filter, L): 3.5
Oil filter: Hiflofiltro HF163
Air filter: Hiflofiltro HFA7919
Coolant (L): 3.2
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~400 km on a full tank (22.0 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 0.15-0.20 mm, exhaust cold 0.25-0.30 mm. Engine oil: oil grade SAE20W-50, API SF, 3.75 L with filter change, 3.5 L without filter change. Spark plug: NGK D7EA (gap 0.6-0.7 mm). Brake fluid: DOT 4. Coolant capacity: 3.2 L. Drive: shaft drive. Tire pressure: front 2.25 bar, rear 2.5 bar (cold). Tire size: front 120/70-17, rear 160/60-18. 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-50, API SF, 3.75 L (with filter), 3.5 L (without filter)
- OEM OEM recommended engine oil (SAE 20W-50)
- 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 HF163
- OEM OEM oil filter
- Premium Hiflofiltro HF163
- Premium K&N KN-163
- Standard Champion COF
- Standard Vesrah SF
Air filter
Spec: Hiflofiltro HFA7919
- OEM OEM air filter
- Premium K&N Replacement Air Filter
- Premium DNA High Performance
- Standard Hiflofiltro HFA7919
- Standard Champion CAF
Spark plug
Spec: NGK D7EA, gap 0.6-0.7 mm
- OEM NGK D7EA
- Premium NGK DR7EIX
- Premium Denso Iridium Power
- Standard NGK D7EA
- Standard Denso Standard
Front brake pads
Spec: EBC SFA193HH
- OEM OEM front brake pads
- Premium Brembo Z04 / SC
- Premium EBC SFA193HH
- Standard Ferodo Platinum
- Standard TRW Lucas Sintered
Rear brake pads
Spec: EBC SFA193HH
- OEM OEM rear brake pads
- Premium Brembo SP
- Premium EBC SFA193HH
- Standard Ferodo Platinum
- Standard TRW Lucas
Front tire
Spec: 120/70-17, 2.25 bar
- OEM OEM 120/70-17
- Premium Michelin Road / Power
- Premium Pirelli Diablo / Angel
- Standard Metzeler Roadtec / Tourance
- Standard Dunlop Sportmax / Trailmax
Rear tire
Spec: 160/60-18, 2.5 bar
- OEM OEM 160/60-18
- Premium Michelin Road / Power
- Premium Pirelli Diablo / Angel
- Standard Metzeler Roadtec / Tourance
- Standard Dunlop Sportmax / Trailmax
Battery
- OEM OEM battery specification
- Premium Yuasa YTX14-BS or YTZ12S (typical 750-1000cc)
- Premium Motobatt Quadflex
- Standard Exide AGM
- Standard Varta Powersports
Brake fluid
Spec: DOT 4
- OEM OEM recommended brake fluid (DOT 4)
- Premium Motul RBF 600 / 660
- Premium Castrol React SRF
- Standard TotalEnergies HBF4
- Standard Elf BRAKE FLUID DOT 4
Coolant
Spec: 3.20 L coolant capacity
- OEM OEM recommended coolant
- Premium Motul Motocool Factory Line
- Premium Engine Ice
- Standard TotalEnergies Coolelf
- Standard Elf Coolelf Auto Supra
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 0.15-0.20 mm
- OEM Exhaust clearance: cold 0.25-0.30 mm
Suspension
Spec: 41.1 mm telescopic fork / 330 ml SAE 5W
- OEM Fork: 41.1 mm telescopic fork
- OEM Fork oil grade: 330 ml SAE 5W
Drive chain
- OEM OEM chain (matches OEM pitch and length)
- Premium DID VX3 X-Ring
- Premium DID ZVM-X Pro
- Standard JT Sprockets HDR
- Standard AFAM A5
