1986-1991 BMW K 75 / K 75 C / K 75 S / K 75 RT Service Manual

Complete service documentation for BMW K 75 series motorcycles. Covers engine specifications, fuel injection diagnostics, transmission service, ABS system maintenance, and chassis repair procedures for all K 75 variants.

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Document Details

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Document Number / Seller:
23721 / Donald Hernandez
File Size:
30.44 MB
File Type:
PDF
Language:
English, Spanish
Pages:
96
Printable:
Yes
Category:
Motorbike
Last updated / verified
Dec 27, 2025

Models Covered & Key Technical Specifications

BMW K 75, K 75 C, K 75 S, K 75 RT — 1986–1991 Technical Integrated Handbook | K 75 Series Repository.

  • Documented Assembly Gap: 57 x 70 mm bore × stroke is configured at the piston crown structure design Sequences.

  • Measured Load Capacity: For optimal performance, 740 cm³ cylinder volume limits the engine displacement baseline displacement Baseline.

  • Technical Thermal Envelope: The cooling circuit is set to 2.9 L total capacity with 0.41 L expansion tank standards Requirements.

  • Universal Size Parameters: 165 mm clutch disc diameter produces the dry single-disc engagement friction Threshold.

  • Core Fastening Values: The cylinder head requires 8 M10 bolts at 3.0 m·daN initial torque plus 4.5 m·daN final torque Mapping.

  • Rated Running Clearance: Valve clearance is measured at 0.15–0.20 mm (intake) and 0.25–0.30 mm (exhaust) cold setting Configuration.

Professional Workshop Service Manual & Technical Specifications

Full-Coverage Reference Manual: BMW K 75 C, K 75 S, K 75 RT, K 75 (1986-1991) Logic-Archive

Assembly-Group: BMW K 75 models (1986-1991) // Unit-Designations: Three-cylinder inline / Liquid-cooled Engine Logic // Service-Level: Complete diagnostic and maintenance documentation.

Document Section Coverage Details Reference Status
Engine Systems Displacement, combustion chambers, valve specifications Comprehensive technical data included
Fuel Injection Electronic Bosch LE-Jetronic system operation Complete system specifications documented
Transmission Five-speed gearbox, gear ratios, Monolever rear suspension Full gear table and adjustment parameters provided

Providing a structural breakdown of the complete BMW K 75 series repair and maintenance documentation, this manual encompasses the engine block, transmission intermediary systems, cooling circuit performance, and complete electrical system architecture. The document covers fuel injection protocols, ignition timing specifications, and valve clearance reference data alongside detailed chapter overviews addressing engine thermal management, power delivery characteristics, and component-specific service intervals.

Alignment specifications are included for the three-cylinder architecture (1986-1991 model variants), with technical coverage spanning the liquid cooling system, air filtration specifications, and fuel supply pressure documentation. Reference data is included for brake system performance, clutch engagement parameters, and front fork damping characteristics across model variations. Wiring diagrams are provided for the electronic fuel injection control module, alternator charging circuit, and starter motor installation geometry.

Diagnostic procedures are covered for both mechanical malfunction identification and electronic control system fault-finding, with tabulated specification references for cylinder bore measurements, piston clearance tolerances, and bearing journal dimensions. The manual documents torque specifications for the connecting rod fasteners to ensure proper structural integrity.

FAQ

Calculate the **precise** oil capacity for the BMW K 75? keyboard_arrow_down

3.75 litros with filter substitution is required for complete engine oil replenishment, maintaining proper engine lubrication and thermal management.

What values ensure **proper** valve clearance adjustment on intake and exhaust systems? keyboard_arrow_down

0.15 to 0.20 mm specification is mandatory for intake valves and 0.25 to 0.30 mm for escape valves in cold conditions (max. 35°C) to ensure optimal engine performance.

Assess the **standard** service interval parameters for transmission maintenance? keyboard_arrow_down

0.85 litros of API GL5 hypoid oil constitutes the proper filling volume for gearbox maintenance, requiring SAE 80 or 90 viscosity depending on ambient temperature conditions.

What components are **necessary** for proper K 75 cooling system operation and pressurization? keyboard_arrow_down

1.1 bar pressure rating on the circuit valve ensures thermal management efficiency, with 2.9 litros total cooling capacity supporting consistent engine temperature regulation across all operating conditions.

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Reviews (3)

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This manual is a lifesaver! It covers everything you need to know about my K 75. The troubleshooting section is particularly helpful.
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New
Rated 5 out of 5 stars
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New
I found the download process very smooth. The email with the download link came quickly, which was a pleasant surprise. Highly recommended!