Motorcycle BMW R1150RT. Manual - part 34

12.4

12.5

12 13 

Removing and installing coil 

and ignition lead

•

Remove the seat.

•

Remove side panels (

a

46.8).

e

 Attention:

Fuel is flammable and a hazard to health. Observe all 
applicable safety regulations.

•

Remove fuel tank (

a

16.5).

•

Remove the ignition coil. 

•

Disconnect plug.

•

Disconnect ignition lead.

•

Remove spark plug covers.

•

Pull off spark plug cap with special puller, 
BMW No. 12 3 520.

•

Remove ignition leads.

•

Installation is the reverse of the removal proce-
dure.

•

Switch on the ignition.

•

Without starting the engine, fully open the throttle 
once or twice so that the Motronic control unit 
can register the throttle-valve positions.

L

 

Note:

Disconnecting the battery deletes all entries (e.g. 
faults, settings) stored in the Motronic control unit’s 
memory.
Loss of settings can temporarily impair the operat-
ing characteristics when the engine is restarted.

61 00 009 

Checking ignition coil resist-

ance

•

Test with BMW MoDiTeC.

12 3 520

S120010

12.6

12 31 022 

Removing and installing 

alternator

•

Remove the seat.

•

Remove side panels (

a

46.8).

e

 Attention:

Fuel is flammable and a hazard to health. Observe all 
applicable safety regulations.

•

Remove fuel tank (

a

16.5).

•

Disconnect ground (earth) cable from battery.

•

Remove the horn, if necessary.

•

Remove spring strut.

•

Remove alternator mount cover (

a

11.35).

•

Disconnect wiring from alternator.

•

Remove bolt (1) and nut (2).

e

 Attention:

Avoid scratching the components; use masking 
tape if necessary.

•

Remove the alternator.

•

Installation is the reverse of the removal proce-
dure.

•

Install poly-V belt in accordance with the adjust-
ing procedure (

a

12.7).

•

Switch on the ignition.

•

Without starting the engine, fully open the throttle 
once or twice so that the Motronic control unit 
can register the throttle-valve positions.

L

 

Note:

Disconnecting the battery deletes all entries (e.g. 
faults, settings) stored in the Motronic control unit’s 
memory.
Loss of settings can temporarily impair the operat-
ing characteristics when the engine is restarted.

1

R22120020

2

12.7

Poly-V belt adjusting procedure
Poly-V belt installation procedure:

•

Mount the poly-V belt on the pulleys and tension 
it slightly, then turn the crankshaft through one 
revolution and relieve the tension on the belt.

•

Tension the poly-V belt in accordance with the 
specified procedure.

Poly-V belt tensioning procedure:
1 Undo nut (2) and screw on tensioning 

nut BMW No. 12 3 551.

2 Loosen the alternator mounting bolts (3, 4).
3 Use torque wrench to tighten and hold tension-

ing nut BMW No. 12 3 551.

4 Tighten upper retaining nut (4), then remove 

torque wrench from adjusting screw.

5 Tighten all screws and nuts. 

•

Install front cover (1).

X 

Tightening torque:

Poly-V belt preload......................................... 8 Nm
Alternator
to alternator mount cover ............................. 20 Nm
Positive cable to alternator ........................... 15 Nm
Belt pulley to alternator ................................ 50 Nm

12 3 551

RS2000181

2

4

3

1