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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 R80G/S, BMW R80ST, BMW R80, BMW R80RT, BMW R80GS and BMW R80R

Technical data

Model BMW R80G/S (80-87)
Volume (ccm) 797
Cylinders 2
Power (HP) 50
Power (KW) 37
Weight (kg) 196
Seat height (mm) 860
Idle speed (R/Min) 900 ± 100
Injection 0,75 grooves
Tyre pressure front (bar) 2,2
Tyre pressure rear (bar) 2,3 (2,5)
Spark plug 1 NGK BP6ES
Spark Plug 1 NGK BPR6EIX
Standpipe 36 mm telescopic fork
Drive Cardan
Fork oil per rod 230 ML SAE 5W/10W
Engine Oil Without Filter 2,0 L SAE 20W-50
Engine Oil With Filter 2,25 L MIN. API SE
Gearbox Oil 800 ML SAE 90 GL-5
Break Fluid DOT 4
Final Drive Oil 350 ML SAE 90 GL-5
Fuel tank volume 19.5
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 operating clearance
Check brake fluid level at front and rear
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 brake fluid level at front and rear
Renew brake fluid at least once a year
Check/adjust valve clearances
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

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
Renew spark plugs
Check spark plug electrode gaps
Renew intake air cleaner element
Clean carburettor float chambers
Check clutch operating clearance
Grease clutch cable nipple at top and bottom and side stand pivot
Check brake fluid level at front and rear
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 play at steering bearings
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

Maintenance Intervals / Maintenance Schedule / Service for BMW R80 Models

 

Here you will find all important information about the maintenance schedule, the recommended maintenance intervals, and the service for the classic BMW R80 models – including BMW R80G/S, BMW R80ST, BMW R80, BMW R80RT, BMW R80GS, and BMW R80R. Regular maintenance ensures reliability, performance, and value retention of your BMW. At Hornig, you will find all the suitable replacement and wear parts needed for your next service – from oil filters and brake pads to seals and service kits.

 

Recommended Maintenance Intervals at a Glance

The BMW R80 series is among the most robust classic boxer models – however, regular inspections keep your engine in shape and extend the lifespan of all components.

  • Initial inspection: After approx. 1,000 km (only for overhauled or rebuilt engines) – check oil, valve clearance, and fastenings.
  • Standard inspection: Usually every 10,000 km or once a year – includes oil change, filter replacement, visual and functional checks, and inspection and adjustment of valve clearance if necessary.
  • Major service: Every 20,000 km or every two years – includes valve clearance, spark plugs, air filter, brake fluid, and drivetrain check.
  • Brake fluid change: Every 1–2 years for optimal braking performance.
  • Final drive & gearbox oil: Check oil level regularly, change according to maintenance schedule.

Exact details may vary slightly depending on model year and riding style. Additionally, check the maintenance schedule in your owner’s manual.

 

Typical Tasks in the BMW R80 Maintenance Schedule

  • - Change engine oil & oil filter (including new sealing rings and filter element).
  • - Check valve clearance and adjust if necessary (important for air-cooled boxer engines).
  • - Inspect spark plugs and replace according to manufacturer’s 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.
  • - Final drive 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.

These tasks ensure that your R80 remains reliable and safe on the road – whether for everyday use or as a classic collector’s bike.

 

Service Parts from Hornig

For maintaining your BMW R80 models, Hornig offers high-quality replacement and wear parts in original quality. These include:

  • Engine oil and gearbox oil in the correct specification
  • Oil filters, air filters, and sealing rings
  • Spark plugs, ignition cables, and connectors
  • Brake pads, brake discs, and brake fluid
  • Batteries and electrical components
  • Valve cover gaskets and oil seals
  • Final drive and drivetrain components

With the right maintenance kits, you can easily and reliably perform standard tasks such as oil changes or brake service – ideal for hobby mechanics and workshops alike.

 

Important Tips for R80 Owners

  • - Keep a complete service record to maintain your motorcycle’s value.
  • - Use only oils and spare parts with the correct specification for air-cooled boxer engines.
  • - Regularly check tyres, brakes, and lighting – especially after long periods of inactivity.
  • - For older wiring harnesses, a visual inspection for corrosion and contact resistance is worthwhile.
  • - When storing the bike for long periods, perform an oil preservation treatment on the engine.

 

Implement the Maintenance Plan & Order Parts Now

Follow the recommended maintenance intervals for your BMW R80 models to ensure performance and reliability. With high-quality service products and spare parts from Hornig, you can carry out all work professionally and safely. Explore our maintenance categories and order the right parts directly for your BMW R80G/S, R80ST, R80, R80RT, R80GS, or R80R.

 

Note: The information provided here serves as a guideline. Please also check the manufacturer’s information in your BMW R80 owner’s manual or contact a specialist workshop if unsure.