Motorcycle BMW R1150RT. Manual - part 15

00.56 

00 12 610 

Tensioning poly-V belt

(Inspection II)
Retension new poly-V belt once after 
10,000 km (6,000 miles)

e

 Attention:

Work on the poly-V belt only when the engine is 
cold.

•

Remove left side fairing panel.

•

Remove front intake pipe.

•

Disengage fairing bracket from end cover on left.

•

Remove front cover (1).

Poly-V belt tensioning procedure:
1 Remove nut (2) and install tensioning 

nut BMW No. 12 3 551.

2 Loosen the alternator mounting bolts (3, 4).
3 Tighten and hold tensioning 

nut, BMW No. 12 3 551, with torque wrench.

4 Tighten upper retaining nut (4), then remove 

torque wrench from adjusting screw.

5 Tighten all screws and nuts. 

•

Installation is the reverse of the removal proce-
dure.

X 

Tightening torque:

Preload for poly-V belt.................................... 8 Nm
Alternator
to alternator mount cover ............................. 20 Nm

12 3 551

RS2000181

2

4

3

1

 00.57

12 31 240 

Replacing poly-V belt

(Inspection III)
Replace poly-V belt every 
60,000 km (37,000 miles)

e

 Attention:

Work on the poly-V belt only when the engine is 
cold.

•

Remove left side fairing panel.

•

Remove front intake pipe.

•

Disengage fairing bracket from end cover on left.

•

Remove front cover (1).

•

Loosen alternator mounting bolts (2, 3, 4).

•

Remove old poly-V belt.

•

Start by mounting the new poly-V belt on the 
crankshaft pulley, then proceed to mount it on 
the alternator pulley.

•

Install new poly-V belt.

Poly-V belt tensioning 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 Remove nut (2) and install tensioning 

nut BMW No. 12 3 551.

2 Loosen the alternator mounting bolts (3, 4).
3 Tighten and hold tensioning 

nut, BMW No. 12 3 551, with torque wrench.

4 Tighten upper retaining nut (4), then remove 

torque wrench from adjusting screw.

5 Tighten all screws and nuts. 

•

Installation is the reverse of the removal proce-
dure.

X 

Tightening torque:

Preload for poly-V belt.................................... 8 Nm
Alternator
to alternator mount cover ............................. 20 Nm

12 3 551

RS2000181

2

4

3

1

00.58 

12 12 011 

Checking/replacing spark 

plugs

(Inspection II) check/(Inspection III) replace 

•

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

•

Use spark plug wrench, BMW No. 12 3 510, to 
remove the spark plugs.

e

 Attention:

Do not bend electrodes - risk of breakage!

Spark plug:.................................. NGK BKR 7 EKC
Electrode gap:  ........................ 0.8 mm (0.0314 in)
Wear limit: .................................... 1.0 mm (0.04 in)

X 

Tightening torque:

Spark plug NGK BKR7EKC .......................... 25 Nm

11 12 009 

Tightening cylinder heads 

(Inspection I)

•

Remove cylinder head cover.

e

 Attention:

Catch escaping oil.

•

Select a gear and turn the rear wheel, or set the 
piston to TDC on the ignition stroke by turning 
the belt pulley.

Top dead centre on ignition stroke:

•

The TDC mark is visible and the inlet and exhaust 
valves in the cylinder concerned are closed.

•

Tighten cylinder head nuts.

Tightening procedure after 1,000 km (600 miles)
1.

Tighten the cylinder head nuts one after the
other in diagonally opposite sequence

1.1. Slacken one nut at a time
1.2. Tighten nut to initial torque.................... 20 Nm
1.3. Tighten nut to specified wrench angle...... 180°
2.

Slacken/retighten M10 screw................ 40 Nm

R21000190

12 3 520

12 3 510

R21000330

R21000370

 00.59

11 34 004 

Checking/adjusting valve 

clearances

(Inspections I, II and III)

•

Check valve clearance with feeler gauge and, if 
necessary, correct with adjusting screw.

Valve clearances with engine cold(max. 35

ƒC/

95°F):
Inlet ......................................... 0.15 mm (0.0059 in)
Exhaust ................................... 0.30 mm (0.0118 in)

X 

Tightening torque:

Locknut .......................................................... 8 Nm

•

Recheck valve clearances after adjusting. Feeler 
gauge must pull through between valve stem and 
adjusting screw with slight resistance.

•

Assembly is the reverse of the disassembly 
procedure.

e

 Attention:

Make sure that all seals are correctly seated. Seals 
and sealing faces must be free from oil and grease.

X 

Tightening torque:

Cylinder head cover ....................................... 8 Nm

13 60 110 

Checking freedom of throttle 

cable, checking for chafing and 
kinks, replacing if necessary Check-
ing throttle-cable play, checking 
and adjusting idle speed and throt-
tle-valve synchronisation

(Inspections I, II and III)

•

Test-drive the motorcycle until the engine is 
warm.

•

Remove the left side panel.

•

Remove the flap in the right side panel.

Oil temperature: ..................at least 90 

ƒC (194 ƒF) 

•

Push back rubber cap (arrow) on throttle and 
choke cables.

•

Use the adjusting screws to adjust play of throttle 
and choke cables.

Choke cable free travel:

........................................approx. 1 mm (0.0393 in)

Throttle cable free travel:

........................................approx. 1 mm (0.0393 in)

R21000340

R22000320