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 your BMW Motorcycle


Technical data

Model BMW R45 78-80
Volume (ccm) 473
Cylinders 2
Power (HP) 27
Power (KW) 20
Weight (kg) 205
Seat height (mm) 770
Idle speed (R/Min) 900 ┬▒ 100
Injection 0,5 grooves
Tyre pressure front (bar) 1,9
Tyre pressure rear (bar) 2,0
Spark plug 1 NGK BP7ES
Spark Plug 1 NGK BP6ES
Standpipe 36 mm telescopic fork
Drive Cardan
Fork oil per rod 190 ML SAE 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 80/90W GL-5
Break Fluid DOT 4
Final Drive Oil 250 ML 80/90W GL-5
Fuel tank volume 22
Coolant air-cooled


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

Change oil when engine at regular operating temperature, renew oil filter element
Checking clutch play
Checking front and rear brake fluid level
Check operation of brake system and freedom from leaks
Renew brake fluid at least once a year
Checking rear wheel screws
Check/adjust valve clearance
Checking battery acid level
Clean and grease the battery posts
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks (R-models)
Check spark plug electrode gaps (R-models)
Take up slack at bolts and nuts: engine mounts, suspension strut mounts, centre stand (R-models)
Take up slack at cylinder head nuts (R-models)
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 (R)
Oil change: control gear, rear wheel drive, telescopic fork; clean inductive sensor at rear wheel drive (K-models)
Check freedom from leaks of hose connections in the fuel and coolant system; tightening hose clamps if necessary (K-models)
Checking coolant level and concentration (K-models)
[ABS] Checking sensor gaps for ABS, rear and front (K-models)
Checking operation of electric side-stand switch (K-models)
Checking fast-idle (choke) cable and throttle cable (K-models)
Take up slack at bolts and nuts: drive unit at the frame, suspension strut fastening, centre and side stand (bearing block), rear wheel screws (K-models)
Sprinkling guide linkage of adjustable windscreen with silicone (K100LT / K75RT)
Checking condition of tires & wheels, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, ABS, steering, instruments, engine idle speed, CO value (K-models)

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
Checking front and rear brake fluid level
Renew brake fluid at least once a year
Checking battery acid level
Clean and grease the battery posts
Check/adjust valve clearance
Oil inspection: gearbox, rear wheel drive, rear swinging fork (not Paralever) (R-models)
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks (R-models)
Check spark plug electrode gaps (R-models)
Grease clutch cable nipple at top and bottom and side stand pivot (R-models)
Synchronise the carburettors, and adjust the wire cables (R-models)
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 (R)
Oil change: control gear, rear wheel drive, telescopic fork; clean inductive sensor at rear wheel drive (K-models)
Grease clutch cable nipple at top and bottom and side and centre stand pivot (K-models)
Checking coolant level and concentration (K-models)
Examine brake pads and discs for wear (K-models with ABS)
[ABS] Checking sensor gaps for ABS, rear and front (K-models)
[ABS] Checking sensor and impulse giving rundle for blockage with dirt (K-models)
Checking operation of electric side-stand switch (K-models)
[MOTRONIC] Read fault memory (K-Modelle)
Sprinkling guide linkage of adjustable windscreen with silicone (K100LT / K75RT)
Checking condition of tires & wheels, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, ABS, steering, instruments, engine idle speed, CO value (K-models)

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

Change oil when engine at regular operating temperature, renew oil filter element
Replacing spark plugs
Replacing intake air filter
Checking clutch play
Checking front and rear brake fluid level
Check operation of brake system and freedom from leaks
Examine brake pads and discs for wear
Renew brake fluid at least once a year
Check/adjust valve clearance
Check play at steering bearings
Checking battery acid level
Cleaning and greasing battery terminals
Oil change: gearbox, rear wheel drive, rear swinging fork (not Paralever), telescopic forks (R-models)
Check spark plug electrode gaps (R-models)
Clean carburettor float chambers (R-models)
Grease clutch cable nipple at top and bottom and side stand pivot (R-models)
Check free travel of rear brake (R-models)
Take up slack at bolts and nuts: engine mounts, suspension strut mounts, centre stand (R-models)
Check swinging arm bearing play at frame and pivot point (Paralever) (R-models)
Check endplay at valve rockers (R-models)
Synchronise the carburettors, and adjust the wire cables (R-models)
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 (R)
Oil change: control gear, rear wheel drive, telescopic fork; clean inductive sensor at rear wheel drive (K-models)
Grease clutch cable nipple at top and bottom and side and centre stand pivot (K-models)
Check freedom from leaks of hose connections in the fuel and coolant system; tightening hose clamps if necessary (K-models)
Replace the fuel filter (K-models)
Checking coolant level and concentration (K-models)
Check operation and freedom from leaks of brake calipers (K-models)
[ABS] Checking sensor gaps for ABS, rear and front (K-models)
[ABS] Checking sensor and impulse giving rundle for blockage with dirt (K-models)
Checking fast-idle (choke) cable and throttle cable (K-models)
Checking operation of electric side-stand switch (K-models)
[MOTRONIC] Read fault memory (K-Modelle)
Renew coating of chain tension rail (every 60.000 km, K-models)
Take up slack at bolts and nuts: drive unit at the frame, suspension strut fastening, centre and side stand (bearing block), rear wheel screws (K-models)
Sprinkling guide linkage of adjustable windscreen with silicone (K100LT / K75RT)
Checking condition of tires & wheels, tire pressures, lights & signal systems, telltale & warning lights, clutch & gear shift, handbrake & footbrake, ABS, steering, instruments, engine idle speed, CO value (K-models)