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Gear ratios

 

This page allows you to compare the road speed of different combinations of transmission and final drive. Click the FD raio you want to see under the column heading of the transmission you want to match it to, and you should see a line appear (Javascript must be enabled). You can click as many as you want and they will overlay each other. There's a 'clear' button for when you want to start over.

Final Drive Gear Ratios

246
4-sp
Type 247 5-sp K75
etc.
R259
5-sp
1998-2006 six-speed * New
R1200
Std/Race/K Std. Enduro Sport

           

           


 


 

 











 

New R1200:
A - original
B - 2008 Street & HP2 Enduro
C - 2008 R1200GS
D - 2008 R1200GS Adventure Enduro

Display speed at 1200 RPM or 5000 RPM

All speeds assume 6.6 foot circumference wheel, no slippage.

Blank = not possible without going crazy. For instance, mating a twinshock final drive to a K-bike.

Information is certain to be incomplete.

*6-speed notes: K1200RS, R1200C, and GS Sport use 'Sport.' R1150GS Adventure uses 'Enduro.' K12LT used both Sport and Standard at different times.

Gear sets

The following crown gearsets exist in BMW Monolever and Paralever motorcycles (not including Monolever Airheads). All have the same 20t pinion spline except for the early K100.

Type 1 pinion: 42mm tip to nut face, no groove (Airhead only)
Type 2 pinion: 28mm tip to nut face, no groove (K75/100 monolever)
Type 2a pinion: 28mm tip to nut face, no groove, 16-tooth pinion spline (early K100)
Type 3 pinion: 30mm tip to nut face, groove (K & R Paralever, R1200C)

Ratio Application PN Pinion
type
Impulse
wheel?
Other
37/11 3.36 K75 disc or drum 33 12 1 454 595 2 Yes  
R850R 33 11 2 314 651 3    
32/10 3.20 R80GS/R 33 12 1 457 556 1 No  
K75 disc or drum 33 12 1 457 062 2 Yes  
34/11 3.09 R1100RS early 33 11 2 311 577 3    
R100R, GS, Mystic 33 12 1 452 572 1   5-bolt
33/11 3.00 K100 before 2/86 33 12 1 451 711 2a Yes  
K100 after 2/86 33 12 1 454 236 2 Yes  
R1100GS, R1100R 33 11 2 311 186 3    
32/11 2.91 K100 before 2/86 33 12 1 451 712 2a Yes  
K100 after 2/86 33 12 1 454 234 2 Yes  
K1100LT 33 12 2 311 238 3 Yes  
R1100RT, 1150RT 33 11 2 330 008 3    
31/11 2.82 K100 4V, K11RS 33 12 2 310 641 3 Yes  
R11RS/RT,1150GS/R/RS/GSAdv 33 11 2 330 020 3    
33/12 2.75 K1, K11LT, K12RS/GT/LT 33 12 2 310 140 3 Yes 5-bolt
R1100S, R850C 33 12 2 332 615 3 Yes  
34/13 2.62 K12LT 33 12 7 661 910 3 Yes 5-bolt
R1200CL 33 12 7 670 761 3 Yes  
33/13 2.54 R1200C 33 12 2 311 663 3 Yes  

Pinion spline length

The spline on the Airhead Paralever pinion is longer. This is due to the fact that whereas the U-joints on most models are coaxial with the swingarm pivots, the U-joints on the Airhead driveshaft are about 12mm farther forward (at the front and rear of the swingarm). Rather than have a very long nose on the rear U-joint, BMW extended the pinion spline. Paralever Airheads have either the 3.09 or 3.20 (not in the US) gear ratio, so only two gearsets are affected by this change.

pinions

Housings and Covers

Gearsets are interchangeable among several different housings, and may work in others with modification. Covers and housings can be mixed as long as the bolt size matches.

STILL UNDER REVIEW

  Application bolt ABS speed PN and notes
O
L
D

S
T
Y
L
E
Airhead PL drum with shock stud M8 - - plain 33 11 1 457 548
K drum M8 - X plain 33 11 1 454 095
K to 3/89 M8 - X plain 33 11 1 450 805
K from 3/89 M10 - X black 33 11 1 457 494
4V K with shock stud
(K1, K100RS 4V, K1100)
M10 - X

silver 33 11 2 323 120
black 33 11 2 310 899
yellow 33 11 2 310 72
gold ?

N
E
W

S
T
Y
L
E
R11 non-ABS
K12 iABS
M10 - - silver 33 11 2 312 317
silver 33 11 2 314 707 threaded for fender
black 33 11 7 668 776
R11 ABS M10 X - silver 33 11 2 330 476
silver 33 11 2 314 799 threaded for fender
black 33 11 7 668 738
R11S non-ABS
K12 ABS2
M10 - X silver 33 11 2 332 380
black 33 11 7 674 451
R11S ABS2 M10 X X silver 33 11 2 335 084
C
O
V
E
R
S
Airhead PL drum M8 -   plain 33 11 1 457 935
K drum M8 -   plain 33 11 1 450 794
Smooth 2V K to 3/89 M8 -   plain 33 11 1 450 882
black 33 11 1 457 433
2V K from 3/89
Paralever with fixed caliper
M10 -   black 33 11 2 310 921
yellow 33 11 2 310 724
silver 33 11 2 323 123
gold ?
Cutaway ABS w/tab M10 X   black 33 11 2 330 038
Non-ABS w/tab M10 -   black 33 11 2 330 035
ABS M10 X   black 33 11 2 330 044
Non-ABS M10 -   black 33 11 2 330 041
LT (caliper on bottom) M10     black 33 11 2 333 015