Manual - Chapter 5 - Fuel & Oil

Specifications

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

Fuel tank capacity
100 models 22 litre (4.84 Imp gal, 5.81 US gal)
75 models 21 litre (4.62 Imp gal, 5.55 US gal)
No reserve supply fitted, low level warning by system of warning lamps - see Chapter 10
Recommended fuel grade
See Section 21 for full information
Early 100 models Leaded premium*
Early 75 models Unleaded or leaded regular*
UK 75 models, early US 75 models Unleaded or leaded premium*
Later US 75 models Unleaded or leaded regular*
* Premium is defined as:

Leaded

Premium (super, 4-star) grade petrol (gasoline) to German DIN 51600 standard or equivalent. minimum octane rating 98 Research Method (RM/RON), 88 Motor Method (MM/MON)

Unleaded

Premium (super, 4-star) grade petrol (gasoline) to German DIN 51607 standard or equivalent, minimum octane rating 95 Research Method (RM/RON), 85 Motor Method (MM/MON)
* Regular is defined as:

Leaded

Regular (2-star) grade petrol (gasoline) to German DIN 51600 standard or equivalent, minimum octane rating 91 Research Method (RM/RON), 82.5 Motor Method (MM/MON)

Unleaded

Regular (2-star) grade petrol (gasoline) to German DIN 51607 standard or equivalent, minimum octane rating 91 Research Method (RM/RON), 82.5 Motor Method (MM/MON)
Note: Information is correct at time of writing - for confirmation of details check with rider's handbook supplied with machine, or with a local BMW dealer or the BMW importer
Fuel system
Type Bosch LE-Jetronic    
Fuel pump pressure approximate 2.5 bar (36 psi)
Regulator safety valve opens at 4.7 bar (68 psi)
Idle speed 950 1: 50 rpm
Maximum permissible CO value 2.0 - 2.5% (by volume) at idle speed
Injectors shut off at:
75 models 8905 rpm
100 models 8770 rpm
Engine oil
Quantity:
At oil change 3.50 lit (6.2 Imp pint. 3.7 US qt)  
>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
Engine lubrication system
Relief valve opens at 5,4 bar (78 psi)
Oil pressure warning lamp lights below 0,2 - 0,5 bar (3 -7 psi)
Filter bypass valves opens at pressure differential of 1,5 bar (22 psi)

Torque wrench settings

75 models

100 models

Component Nm lbf ft Nm lbf ft
Intake stub mounting bolts 7 ± 1 5 ± 0,5 N/Av N/Av
Fuel rail mounting bolts 7 ± 1 5 ± 0,5 N/Av N/Av
Pressure regulator mounting bolts 25 ± 3 18,5 ± 2 N/Av N/Av
Air filter lower section mounting bolts 21 ± 1 15,5 ± 0,5 N/Av N/Av
Exhaust pipe retaining nuts 21 ± 2 15,5 ± 1,5 16,5 12
Exhaust pipe/silencer clamp bolt 21 ± 2 15,5 ± 1,5 N/Av N/Av
Silencer/footrest mounting bolt 9 ± 1 6,5 ± 0,5 N/Av N/Av
Silencer cover mounting screws 6 ± 1 4,5 ± 0,5 N/Av N/Av
Oil/water pump assembly mounting srews 7 ± 1 5 ± 0,5 N/Av N/Av
Oil/water pump cover screws 7 ± 1 5 ± 0,5 N/Av N/Av
Oil pressure switch 40 ± 5 29,5 ± 4 44 32,5
Oil pressure relief valve plug 35 ± 4 26 ± 3 24 18
Oil pan (sump) and filter cover screws 7 ± 1 5 ± 0,5 6 4,5
Engine oil drain plug 32 ± 4 23,5 ± 3 32 23,5
Oil filter - all models

1st stage

Lightly oil filter seal, screw on by hand until seal seats on machined surface

2nd stage

Tighten through 1/2 turn maximum (10 - 12 Nm / 7,5 - 9 lbf ft)

 

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