Maintenance - Specifications

Refer to Chapter 11 for subsequent modifications and information relating to the 1988 on models.

Spark plugs Bosch XSDC
Spark plug gap:
Standard 0.6 - 0.7 mm (0.024 - 0.028 in)
Service limit 0.8 mm (0.032 in)
Valve clearances - engine cold (maximum coolant temperature 20 °C/68 :°F):
Intake 0.1 5 - 0.20 mm (0.006 - 0.008 in)
Exhaust 0.25 - 0.30 mm (0.010 - 0.012 in)
ldle speed 950 ± 50 rpm
Throttle and 'choke' cable free play 0.5 - 1.0 mm (0.02 - 0.04 in)
Clutch cable free play - at handlebar lever:
75 models 2.0 - 2.5 mm (0.08 - 0.1 0 in)
100 models 4.0 - 4.5 mm (0.16 - 0.18 in)
Length of clutch inner cable at gearbox end 75 + 1 mm (2.95 + 0.04 in)
 
Cycle parts
Brake pad/shoe friction material minimum thickness 1.5 mm (0.06 in)
Drum rear brake free play - at pedal tip 15 - 25 mm (0.6 - 1.0 in)
Tire pressures - tires cold: Front Rear
75 models:
Solo 29 psi (2.00 bar) 36 psi (2.50 bar)
Pillion 34 psi (2.30 bar) 42 psi (2.90 bar)
100 models:
Solo 33 psi (2.25 bar) 36 psi (2.50 bar)
Pillion up to 112 mph (180 km/h) 33 psi (2.25 bar) 39 psi (2.70 bar)
Pillion above 112 mph (180 km/h) 39 psi (2.70 bar) 42 psi (2.90 bar)

Note: information is correct at time of writing - check with machine's handbook or label on rear mudguard for updated information.

Pressures apply to original equipment tires only - check with BMW dealer/importer or tire manufacturer or agent if non-standard tires are fitted - pressures may vary.

Recommended lubricants
Engine:
Capacity - at oil and filter change 3.75 lit (6.6 Imp pint, 3.9 US qt)
Recommended oil Good quality HD oil suitable for 4-stroke spark ignition engines. API classification SE or SF
Viscosity See chart in Routine Maintenance - Oil check
Gearbox and final drive case:
Capacity:
Gearbox 850 + 50 cc (1.50 + 0.09 Imp pint, 0.90 + 0.05 US qt)
Final drive case 260 cc (0.46 Imp pint, 0.28 US qt)
Recommended oil Good quality hypoid gear oil of API class GL-5 or to specification Mil-L-2105 B or C
Viscosity:
Above 5 °C (41 °F) SEA 90 Below 5 °C (41 °F)
SEA 90 Below 5 °C (41 °F) SEA 80
Alternatively SAE 80W90
Coolant
Fuel See Chapter 5 - Fuel & Oil
Front forks: 280 ± 10 cc (9.86 ± 0.35 Imp fl oz, 9.47 ± 0.34 US fl oz)
Capacity - per leg:
Kl00, all other 75 models 330 ± 10 cc (11.62 ± 0.35 Imp fl oz, 11.1 6 ± 0.34 US fl oz)
Kl00 R S, Kl00RT, Kl00 LT 360 ± 10 cc (1 2.67 ± 0.35 Imp fl oz, 12.17 ± 0.34 US fl oz)
Recommended oil Use specified brands and types only see Chapter 7 - Frame & Forks
Brake fluid DOT 4, egg ATE 'SL'
Splined couplings and joints, ie clutch plate, gearbox input shaft, final drive shaft Staburags NBU 30 PTM compound, Optimol Paste PL or Uni Moly C 220 Slip Agent
Front wheel, steering head and swinging arm pivot bearings Good quality high melting-point lithium fiber-based grease, eg Shell Retinax A
Fluidbloc steering head damper Silicone grease only eg 'Silicone Grease 300 Heavy'
All other greasing points As wheel bearings type
Battery terminals Petroleum jelly (Vaseline) or acid-free grease eg Bosch Ft 40 V1
Control cable nipples and all other pivots Engine oil or light machine oil
Control cables Nylon lined - if lubrication is considered necessary use only suitable lubricant