Dapper service sheet | v1.1
38 verified workshop values for the K100, K100RS, K100RT, K100LT (2-kleps, type K589), model years 1982-1992: torque specifications, fluids and capacities, valve clearances and adjustment data.
| Engine oil specification | Brand-name HD oil API SE/CC or SF/CC; viscosity by ambient temperature (e.g. SAE 10W-40, 15W-40, 20W-50) |
| Engine oil capacity (with filter change) | 3.75 l |
| Engine oil capacity (without filter change) | 3.5 l |
| Coolant type | Glycol antifreeze with water; 50:50 protects to -36 C (40:60 to -28 C) |
| Coolant capacity | 2.8 + 0.4 (expansion tank) l |
| Gearbox oil specification | Hypoid oil API GL-5; SAE 90 above 5 C, SAE 80 below 5 C, or SAE 80W-90 |
| Gearbox oil capacity | 0.85 ± 0,05 l |
| Final drive oil specification | Hypoid oil API GL-5; SAE 90 / SAE 80 / SAE 80W-90 (same as gearbox) |
| Final drive oil capacity | 0.26 l |
| Fork oil, K100 (standard) | 330 -10 ml per leg |
| Fork oil, K100RS / RT / LT | 360 -10 ml per leg |
| Fork oil type | Only approved thin fork and shock absorber oil per the factory list (e.g. Aral P3441, Shell 4001, Bel-Ray SAE 5); common fork oils are considerably thicker than BMW specifies |
| Brake fluid | DOT 4, renew annually |
| Front axle (quick-release axle) | 33 ± 4 Nm |
| Front axle clamp bolt | 14 ± 2 Nm |
| Rear wheel bolts | 105 ± 4 Nm |
| Engine oil drain plug | 18 ± 2 Nm |
| Gearbox drain / filler plug | 20 ± 3 Nm |
| Final drive drain plug | 25 ± 3 Nm |
| Spark plugs (torque) | 20 ± 2 Nm |
| Front brake disc | 29 ± 3 Nm |
| Rear brake disc | 21 ± 2 Nm |
| Brake caliper | 32 ± 2 Nm |
| Steering head bearing adjuster | Adjust free of play (no torque value) |
| Steering head lock nut | 45 ± 3 (5 mm hex nut) / 65 ± 5 (7 mm hex nut) Nm |
| Fork yoke clamp bolts | 22 ± 1 (upper) / 43 ± 3 (lower) Nm |
| Spark plug type | Bosch X5DC / Beru 12-5 DU / Champion A85YC; NGK equivalent D7EA (BMW part no. 12 12 9 062 217) |
| Spark plug gap | 0.6 +0.1 (new) mm |
| Valve clearance, intake | 0.15 to 0.20 mm (cold, max 35 C) |
| Valve clearance, exhaust | 0.25 to 0.30 mm (cold) |
| Idle speed | 950 ± 50 rpm |
| Battery | 12 V; 20 Ah (up to 1986), 25 Ah (from 1987), 30 Ah (optional and standard on K100LT) |
| Front tyre | 100/90 V18 tubeless (rim MT H2.50x18) |
| Rear tyre | 130/90 V17 tubeless (rim MT H2.75x17); VR option 140/80 VR17 only as a pair with 100/90 VR18 |
| Tyre pressure, solo | front 2.25 / rear 2.50 (cold, V tyres) bar |
| Tyre pressure, two-up | up to 180 km/h: 2.25 / 2.70; above 180 km/h: 2.70 / 2.90 bar |
| Tyre pressure, VR tyres | VR tyres: solo 2.55/2.80; two-up to 180 km/h: 2.55/3.00; two-up above 180 km/h: 3.00/3.20 bar |
| Fuel tank capacity | 22 l |
Every value on this sheet was researched twice, independently, and only published where both passes agree with factory documentation. Version 1.1, last updated 2026-08-13. Always double-check critical values against the original workshop manual for your exact model year. Spotted an error? Tell us at info@dappermotor.com and we correct it within 48 hours.