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BMW · Shim-adjusted overhead-cam four-stroke twin, dry sump, gearbox shares engine oil, chain drive

F 850 GS

Library entry covers 2018-2024

25 factory 52 guideline

Published source

BMW Motorrad Rider's Manual (US Model) F 850 GS, Maintenance schedule pp.261-264 (manuals.bmw-motorrad.com)

Factory source. Covers BMW Motorrad Rider's Manual (US Model) F 850 GS (cover prints F 850 GS; file code 0418, no edition year verified in the pages read).

77 items for a 2024 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Dry sump (separate oil tank)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, shim adjusted (incl. desmo)
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Liquid cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine oil
Clutch control: Hand lever, cable
Final drive: Chain
Front suspension: Telescopic fork
Rear suspension: Swingarm, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2024 BMW F 850 GS

On the road: every 300 km

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 500 km

3 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Guideline

Lube warm, ideally at the end of the riding day so it soaks in overnight. Sooner after rain.

On the road: every 800 km

1 item

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 1,207 km

1 item

BMW running-in check

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): once at 500-1,200 km (300-750 mi). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.

Every 1,600 km or 6 months

1 item

Inspect tire tread, sidewalls and date codes

Wheels and tires

Guideline

Every 5,000 km or 12 months

10 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Guideline

Non O-ring chains on old machines: remove, clean, soak in hot chain grease or lube, refit with the master link clip closed end leading.
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering head bearing adjustment

Front end

Guideline
Inspect fork seals, stanchions and fork boots

Front end

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Guideline
Check brake pads and discs

Brakes

Guideline
Check spoke tension and wheel true

Wheels and tires

Guideline
Check wheel bearings for play

Wheels and tires

Guideline

Every 6,500 km or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 8,000 km or 12 months

2 items

Change engine oil

Engine

Guideline

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.
Replace oil filter

Engine

Guideline

Every 9,500 km or 12 months

7 items

Inspect coolant hoses and clamps

Engine

Guideline
Clean / inspect air filter

Fuel and air

Guideline

Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Check swingarm bushes for play

Rear suspension and frame

Guideline
Inspect rear shocks for leaks and damping

Rear suspension and frame

Guideline
Lubricate control cables and lever pivots

Controls and cables

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 9,656 km or 12 months

2 items

Engine oil and filter (change)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 10,000 km (6,000 mi), or yearly, whichever first (note a). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Air filter insert (check or replace)

Fuel and air

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 10,000 km (6,000 mi); for off-road use yearly or every 6,000 mi (note b). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.

Every 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 19,312 km

3 items

Spark plugs (replace all)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 20,000 km (12,000 mi). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Valve clearance (check)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 20,000 km (12,000 mi). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Air filter insert (replace)

Fuel and air

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 20,000 km (12,000 mi). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.

Every 19,500 km or 2 years

4 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Clean and grease rear suspension linkage

Rear suspension and frame

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 24,000 km or 3 years

1 item

Change fork oil

Front end

Guideline

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Every 24,000 km or 4 years

1 item

Check valve clearances (shim adjusted)

Engine

Guideline

Every 25,500 km or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 28,968 km

1 item

Telescopic fork oil (change)

Front end

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 30,000 km (18,000 mi). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.

Every 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 32,000 km or 4 years

2 items

Repack / replace steering head bearings

Front end

Guideline

Many old machines use loose balls in cups and cones. Taper roller conversions are common.
Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 38,500 km or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 40,000 km or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 48,500 km or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

17 items

Coolant level (check)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Engine start suppression (functional check)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Final inspection and road safety check

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Lighting and signal system (check)

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Set service due date and remaining distance with the diagnosis system; confirm the service in the vehicle literature

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Vehicle test with the BMW Motorrad diagnosis system

Engine

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Battery charging state (check)

Ignition and electrics

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Clutch play (check, adjust)

Primary and gearbox

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Chain drive (check, lubricate)

Final drive

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Steering-head bearing (check)

Front end

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Side stand and center stand (check ease of movement)

Rear suspension and frame

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Brake lines, hoses and connections (visual inspection)

Brakes

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Front and rear brake fluid level (check)

Brakes

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Front brake pads and discs (check wear)

Brakes

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Rear brake pad and disc (check wear)

Brakes

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Spoke tension (check, tighten as needed)

Wheels and tires

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Tire pressure and tread depth (check)

Wheels and tires

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): every 12 months (BMW Service standard scope). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.

Every 2 years

5 items

Replace coolant

Engine

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Brake fluid, entire system (change)

Brakes

Factory

Factory: Maintenance schedule and BMW Service standard scope (BMW Motorrad Rider's Manual (US Model) F 850 GS, chapter 14, printed pp.261-264; official BMW Motorrad PDF): first after one year, then every two years (note c). Columns as printed: 500-1,200 km (300-750 mi); every 10,000 km (6,000 mi) up to 100,000 km (60,000 mi); 12 months; 24 months. Note a: yearly or every 6,000 mi, whichever first. Note b: for off-road use, yearly or every 6,000 mi, whichever first. Note c: first after one year, then every two years.
Replace brake fluid

Brakes

Guideline

Every 4 years

3 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Inspect brake hoses; replace old rubber

Brakes

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
Replace tires on age (regardless of tread)

Wheels and tires

Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.