Important information
Regular maintenance is a must for a reliable and good motorcycle. Under normal driving conditions you can do the service a few hundred km sooner or later.
Subsequent you will find technical data as well as maintenance and service information.
We make no claim to completeness or accuracy of all data, these are only for your information.

Spares for BMW R100GS, BMW R100GS Paris-Dakar, BMW R100R, BMW R100RS Classic, BMW R100RT Classic


Technical data

Model BMW R100 1980-1984
Volume (ccm) 980
Cylinders 2
Power (HP) 67
Power (KW) 49
Weight (kg) 225
Seat height (mm) 810
Idle speed (R/Min) -
Injection -
Tyre pressure front (bar) 1,9 (2,2)
Tyre pressure rear (bar) 1,8 (2,3)
Spark plug 1 NGK BP7ES
Spark Plug 1 NGK BPR7EIX
Standpipe 36 mm telescopic fork
Drive Cardan
Fork oil per rod 230 ML SAE 5W/10W
Engine Oil Without Filter 2,75 L with oil cooler
Engine Oil With Filter 2,5 L SAE 20W-50
Gearbox Oil 800 ML SAE 90 GL-5
Break Fluid DOT 4
Final Drive Oil 350 ML SAE 90 GL-5
Fuel tank volume 24
Coolant air-cooled


Running-in Check / 600 miles (1.000 km) service:

Change oil when engine at regular operating temperature, renew oil filter element
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks
Check spark plug electrode gaps
Check clutch play
Check front and rear brake fluid level
Check operation of brake system and freedom from leaks
Renew brake fluid at least once a year
Take up slack at bolts and nuts: engine mounts, suspension strut mounts, centre stand
Check slack at rear wheel studs
Take up slack at cylinder head nuts
Check/adjust valve clearances
Check battery acid level
Clean and grease the battery posts
Synchronise the carburettors, and adjust the wire cables
Checking condition of tires & wheels, rims & spokes, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, steering, instruments, engine idle speed, engine undertray for blockage with dirt

6.000 miles (10.000 km) service (30.000 km / 50.000 km):

Change oil when engine at regular operating temperature, renew oil filter element
Oil inspection: gearbox, rear wheel drive, rear swinging fork (not Paralever)
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks
Check spark plug electrode gaps
Clean carburettor float chambers
Grease clutch cable nipple at top and bottom and side stand pivot
Check front and rear brake fluid level
Renew brake fluid at least once a year
Check/adjust valve clearances
Check battery acid level
Clean and grease the battery posts
Synchronise the carburettors, and adjust the wire cables
Checking condition of tires & wheels, rims & spokes, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, steering, instruments, engine idle speed, engine undertray for blockage with dirt

12.000 miles (20.000km) service (40.000 km / 60.000 km):

Change oil when engine at regular operating temperature, renew oil filter element
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks
Check spark plug electrode gaps
Replace all spark plugs
Replace intake air filter
Clean carburettor float chambers
Check clutch play
Grease clutch cable nipple at top and bottom and side stand pivot
Check front and rear brake fluid level
Check operation of brake system and freedom from leaks
Examine brake pads and discs for wear
Check free travel of rear brake
Renew brake fluid at least once a year
Take up slack at bolts and nuts: engine mounts, suspension strut mounts, centre stand
Check swinging arm bearing play at frame and pivot point (Paralever)
Check endplay at valve rockers
Check/adjust valve clearances
Check the steering-head bearing
Checking battery acid level
Clean and grease the battery posts
Synchronise the carburettors, and adjust the wire cables
Checking condition of tires & wheels, rims & spokes, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, steering, instruments, engine idle speed, engine undertray for blockage with dirt

Customer Service & Maintenance Intervals for Your BMW R100 Models

 

Careful customer service is the foundation for reliability, riding pleasure, and value retention of your classic BMW R100 models – whether it’s the BMW R100, BMW R100RS, BMW R100RT, BMW R100R, BMW R100CS, or BMW R100/T. On this page, you will find all essential information about recommended maintenance intervals, typical service tasks, and replacement/wear parts needed for your boxer engine. At Hornig, you will find high-quality service kits and spare parts specifically tailored to the requirements of the BMW R100 series.

 

Recommended Service Intervals (Overview)

Although the BMW R100 series is known for robustness and durability, only regular maintenance ensures that performance, safety, and value retention are preserved.

  • Break-in/Initial Check: After approx. 1,000 km – oil change, filter change, visual inspection, and possibly a first valve clearance check.
  • Standard Inspection: Typically every 10,000 km or once a year – includes oil change, filter change, visual and functional checks, and inspection and adjustment of valve clearance if necessary.
  • Major Service: Every 20,000 km or every two years – supplemented with tasks such as air filter replacement, spark plug change, brake fluid, and driveshaft/final drive checks.
  • Brake and Operating Fluid Changes: Brake fluid every 1–2 years; gearbox, driveshaft, and rear axle oil depending on usage and time intervals.

Note: Details may vary slightly depending on model year, equipment, and usage profile – please always consult your motorcycle’s owner’s manual or maintenance booklet.

 

What is Typically Checked During an Inspection?

  • Change engine oil & oil filter (including new sealing rings and filter element).
  • Check and adjust valve clearance if necessary (important for air-cooled boxer engines).
  • Inspect spark plugs and replace according to manufacturer specifications.
  • Check or replace air filter – especially in dusty environments.
  • Inspect braking system: brake pads, discs, lines, and brake fluid.
  • Tyres, wheels & steering: visual and functional inspection for damage or play.
  • Driveshaft and gearbox: check seals, oil level, and lubrication.
  • Electrical system & lighting: check battery condition, charging system, and lights.
  • General visual inspection: check for leaks, fasteners, cables, and throttle cables.

 

Service Parts & Maintenance Kits from Hornig

For your BMW R100 models, Hornig offers a comprehensive range of high-quality spare parts and maintenance kits. These include:

  • Engine and gearbox oils in correct specifications
  • Oil filters, air and fuel filters, sealing rings, and shaft seals
  • Spark plugs, ignition cables, and electrical components
  • Brake pads, brake discs, and brake fluid
  • Batteries, chargers, and cable connection sets
  • Driveshaft/final drive parts, bearings, lubrication & seals

With the right kits, you can complete standard tasks more quickly and safely – whether in your home garage or a professional workshop.

 

Practical Tips for Owners of BMW R100 Models

  • Keep a complete service documentation – thorough records increase resale value.
  • Use only spare parts and operating fluids with suitable specifications for air-cooled boxer engines.
  • Perform inspections more frequently after long periods of inactivity or during short-distance operation.
  • Storing the motorcycle over winter? Then remove the battery, perform an oil change beforehand, and stabilize the fuel.
  • Safety first: Always carry out brake and suspension work with great care or have it done professionally.

 

Schedule Your Service & Order Parts Now

Plan your customer service early for your BMW R100 models – with suitable replacement and wear parts from Hornig, your maintenance will be efficient, reliable, and professional. Explore our range now and order conveniently online or contact our team for individual advice.

 

Note: This text serves as a guideline. For precise information on maintenance intervals and scope, please consult your vehicle’s owner’s manual or a qualified specialist workshop.