Motorcycle BMW R1150RT. Manual - part 51

23.28

•

Insert screws (1) and tighten in diagonally oppo-
site sequence.

•

Drive home dowel pins (2).

•

Install switch of gear indicator (3) and clip 
cable (4) into position.

•

Remove metal particles from the magnet in oil 
drain plug (5).

•

Install the oil drain plug with a new sealing ring.

•

Fill with oil.

•

Install oil-check and oil filler plug (6) with new 
sealing ring.

Capacity:
Initial filling/oil change approx. 0.8 l (1.41/0.85 Imp. 
pint/US quart) (up to bottom of thread in oil filler 
neck)

Oil grade:
Brand name SAE 90 API GL5 hypoid oil or 
Castrol MTX 75W-140 GL 5

•

Install the shift lever in such a way that the marks 
(arrow) are aligned.

•

After assembling the gearbox, perform a func-
tional check.

X 

Tightening torque:

Gearshift lever to gearshift shaft..................... 9 Nm

R21230020

3

1

4

6

5

2

2

R21230150

31.1

Contents

Page

31

Technical Data

............................................................................................................................... 3

Removing and installing telescopic fork 

.........................................................................5

Removing and installing telescopic fork without fork bridge 

.......................................5

Removing and installing fork bridge 

.......................................................................................6

Removing and installing pot-type joints  ...............................................................................................7
Removing and installing angular-contact ball bearing  ..........................................................................7

Removing and installing slider tube bridge 

.........................................................................8

Removing and installing ball joint in slider tube bridge .........................................................................8

Checking friction at ball joint/angular-contact ball bearing 

..........................................8

Assembly instructions for telescopic fork  ............................................................................................9

Disassembling and assembling telescopic fork 

....................................................... 10

Disassembling telescopic fork 

................................................................................................ 10

Assembling telescopic fork 

...................................................................................................... 10

Measuring telescopic fork 

.................................................................................................... 11

Examining slider tube bridge and fork bridge 

.................................................................. 11

Checking runout of fixed tube 

................................................................................................. 11

Checking runout of slider tube 

............................................................................................... 11

Removing and installing leading link 

............................................................................... 12

Disassembling and assembling leading link 

............................................................... 12

Measuring the leading link 

........................................................................................................ 13

Removing and installing front suspension strut 

........................................................ 13

31 Front forks

31.2

31.3

31

Technical Data 31 Front suspension

R 1150 RT

Type

 BMW Telelever with external suspension strut

Running gear

Total spring travel at wheel

mm (in) 120 (4.7245)

Castor in normal position 
(full fuel load and 85 kg/187 lbs 
rider)

mm (in) 122 (4.8032)

Steering lock angle

° 2 X 34

Fixed fork tube

Fixed tube surface

Hard chrome plated

Extl. dia. of fixed fork tubes

mm (in) 35 (1.3780)

Fixed fork tube runout limit

mm (in) 0.4 (0.0157)

Fork oil

Approved types

BMW telescopic fork oil

Capacity per fork leg

l (Imp. pint/US quart) 0.45 (0.79/0.47)

Spring strut

Type

Central spring strut with twin-tube, gas-filled 
shock absorber