Motorcycle BMW R1150RT. Manual - part 44

21.10

•

Remove rear brake fluid reservoir from its holder.

•

Loosen the fasteners securing the left footrest 
plate.

•

Remove top screw of left footrest plate.

•

Remove rear screw of left footrest plate.

•

Remove fasteners securing rear brake master 
cylinder to footrest plate.

•

Remove the right footrest plate (

a

46.17).

•

Remove rear-frame fasteners on left and right at 
front, but only loosen strut fasteners.

•

Carefully lift rear frame approx. 15 mm 
(approx. 0.5906 in).

•

Remove frame tube from gearbox.

•

Disconnect the lines from the clutch slave cylin-
der.

•

Remove clutch slave cylinder.

•

Installation is the reverse of the removal proce-
dure.

L

 Note:

When installing, fit new sealing rings.

•

Fill the clutch operating system (

a

00.54).

X 

Tightening torque:

Clutch slave cylinder to gearbox .................... 9 Nm
Frame tube to gearbox
Tightening sequence:
Connecting pipe/gearbox
1. To gearbox and left footrest plate
(clean thread + Loctite 2701)........................ 42 Nm
2. Clamp block, connecting tube to gearbox.. 9 Nm
3. To gearbox and right footrest plate
(clean thread + Loctite 2701)........................ 42 Nm

21 52 005 

Filling and bleeding clutch 

line

See instructions for changing clutch fluid (

a

00.54).

23.1

Contents

Page

23

Technical Data

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

Gearbox - sectional drawing 

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

Removing and installing gear-shift lever 

.........................................................................7

Removing and installing gearbox 

........................................................................................7

Replacing shaft sealing rings in gearbox housing and gearbox cover 

................. 10

Replacing input shaft sealing ring at input end  .................................................................................. 10
Replacing output shaft sealing ring  ................................................................................................... 10
Replacing input shaft sealing ring at output end ................................................................................ 11
Replacing shaft sealing ring for selector drum ................................................................................... 11
Replacing sealing ring for gearshift shaft  ........................................................................................... 11

Disassembling gearbox 

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

Removing gearbox housing 

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

Removing selector drum 

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

Disassembling and assembling selector shaft 

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

Removing gearbox shafts 

......................................................................................................... 14

Replacing grooved ball bearings of intermediate shaft 

................................................ 14

Disassembling and assembling input shaft 

...................................................................... 15

Disassembling input shaft  ................................................................................................................. 15
Assembling input shaft/checking and adjusting end float of spring cluster  ........................................ 16

Disassembling and assembling output shaft 

................................................................... 17

Disassembling output shaft  ............................................................................................................... 17
Assembling output shaft .................................................................................................................... 18

Checking endplay 

......................................................................................................................... 19

Checking and adjusting fully assembled length of gearbox shafts and selector 
drum 

...................................................................................................................................................20

Checking and adjusting fully assembled length of intermediate shaft  ................................................20
Checking and adjusting fully assembled length of output shaft  .........................................................21
Checking and adjusting fully assembled length of input shaft ............................................................22
Checking and adjusting fully assembled length of selector drum  ......................................................23

Shimming selector shaft 

............................................................................................................24

Assembling gearbox 

.................................................................................................................25

Installing input, output and intermediate shafts 

..............................................................25

Installing selector shaft 

...............................................................................................................26

23 Gearbox

23.2

Contents

Page

Installing selector drum 

..............................................................................................................26

Installing gearbox housing 

........................................................................................................27

23.3

23

Technical Data 23 Gearbox

R 1150 RT

Type

6-speed gearbox with dog-clutch engagement 
mechanism and integral vibration damper

Gearshift type

Foot shift lever and gear selector drum with over-
shoot detent

Oil grade (all-year)

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

Capacity l

(Imp. pint/

US quart)

approximately 0.8 (1.41/0.85) (to the bottom of 
the filler neck thread)

Gear ratio

1st gear

3.863

2nd gear

3.022

3rd gear

2.393

4th gear

1.961

5th gear

1.700

6th gear

1.316

Adjustment data

Selector shaft endplay

mm (in) 0.1...0.3 (0.0039...0.0118)

Endplay of spring segment at input shaft

mm (in) 0.4...0.6 (0.0157...0.0236)

Length of selector drum, fully assembled

mm (in) 111.80...111.90 (4.4015...4.4055)

Output shaft endplay

Free gearwheel, 1st gear

mm (in) 0.1...0.33 (0.0039...0.0130)

Free gearwheel, 2nd gear

mm (in) 0.1...0.33 (0.0039...0.0130)

Free gearwheel, 3rd and 4th gears 
(total play)

mm (in) 0.1...0.67 (0.0039...0.0264)

Intermediate shaft endplay

Free gearwheel, 5th gear

mm (in) 0.1...0.46 (0.0039...0.0181)

Free gearwheel, 6th gear

mm (in) 0.1...0.46 (0.0039...0.0181)

BMW recommends Castrol