BMW K bikes (Bricks)

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1Back to top Go down    K-bike seats across the spectrum on Fri Oct 12, 2018 12:48 pm

brickrider2

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There is a large spread of OEM part numbers for K-bike seats, which reflect low/high seats, different colors, the so-called "comfort" models, and who knows what else. My question is: would a K-bike seat from a four cylinder model fit any other four cylinder model? They all seem to have hinges on the right side and a lock on the left, so the basic arrangement of the seat pan hardware seems identical.


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1996 K1100LT
    

2Back to top Go down    Re: K-bike seats across the spectrum on Fri Oct 12, 2018 1:46 pm

duck

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Yes, BUT the seat hinges on later K1100s have about a half inch thick piece of rubber in them so the mounting points on the later seat pans are different.

If you use the old style hinges you can mount a K75 or K100 seat on a K1100.

(And the 1985 and earlier seats and tail cowls are different as the hand holds are built into the seat, not the tail cowl, on the earlier bikes.)


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

3Back to top Go down    Re: K-bike seats across the spectrum on Fri Oct 12, 2018 7:11 pm

Point-Seven-five

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I am not sure, but there is something different in some of the seat pans that prevents them from working with the under seat tray that has the cover. Maybe it's the pan, or maybe the hinges, but in any event some seats won't work unless you remove the tray.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down    Re: K-bike seats across the spectrum on Fri Oct 12, 2018 8:53 pm

duck

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@Point-Seven-five wrote:I am not sure, but there is something different in some of the seat pans that prevents them from working with the under seat tray that has the cover. Maybe it's the pan, or maybe the hinges, but in any event some seats won't work unless you remove the tray.

The seat pan on some factory K1100 seats dips down into the frame under the rider. I have Rick Mayer seat built on a K1100 seat pan that I run on one of my K75s. I use the low seat version of the L-Jetronic holder on that bike so there's no tool box in the way of the seat pan.

Part 9:
http://www.realoem.com/bmw/enUS/showparts?id=0561-EUR---K569-BMW-K%2075%2084%20(0561)&diagId=52_1028


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

5Back to top Go down    Re: K-bike seats across the spectrum on Sat Oct 13, 2018 7:05 pm

Point-Seven-five

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The comfort seat pan on my 1994 K75RT won't fit on a bike with an underseat tray. The bike has no covered tray.


__________________________________________________
Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

6Back to top Go down    Re: K-bike seats across the spectrum on Sat Oct 13, 2018 7:16 pm

TacKler

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I have found all the normal seats interchangeable on my 75s.

The only one that is slightly different is the Corbin seat which must have the mounting bracket holes slightly out. Just a matter of loosening the bracket and jiggling to fit.

The comfort seat which came from Motorworks fits fine. I have a modified seat (sort of a gunfighter style) from the US built on a BMW base, so it fits as well.

I have had no interference with the tool tray.


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Red 1991 K75S
    

7Back to top Go down    Re: K-bike seats across the spectrum on Sat Oct 13, 2018 7:22 pm

duck

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As Tackler pointed out, the Corbin mounting usually seems to be a hair off. Loosening the two bolts and adjusting the bar that the rear hinge attaches to is often necessary.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

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