BMW K bikes (Bricks)

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1Back to top Go down   Wrong Seat Empty Wrong Seat on Wed Sep 04, 2019 3:44 pm

Davep

Davep
Silver member
Silver member
OK, so I'm the muppet who bought the wrong seat for my early 8V RS. Wrong Seat 61740 The seat on it has completely gone, the cover is non existent and I have used an old leather jacket to try and cover it, the base is corroded beyond repair. So, I found a lovely one on eBay, I skipped to the shed with new seat ready for a quick half an hours work, attached it all, went to bring it down and it wouldn't go! Turns out I have bought the wrong one, the one I need has a flat (ish) base and this one has a lump in it!!!  

So, I can see they have the one I need in motorworks but they still have the metal base, is there any other that would fit with a plastic base as this seems to be a big problem.

Hope that makes sense!

Also, if anyone needs a seat in tan leather I have one!!! Wrong Seat 259495 

Thanks in advance 

Dave


__________________________________________________
Wrong Seat Eu-log10 BMW K100RS 1983 (Main ride)
                      Suzuki GSX 750 ET 1979 (Needs work)
                      Kawasaki Zephyr 750 1992 (Needs hiding)
    

2Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Wed Sep 04, 2019 4:30 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Show the underside in a photo.

Early 8v has a steel base and handles in the seat,

Later one is plastic base and no handles.....they are in the ducktail. You would need ducktail and seat fittings.

K1100 one is also plastic base has a big lump goes down between frame tubes. But won't fit early ducktail. You would need ducktail and seat fittings.

But...what if you remove the cover of the underseat tool tray.......will it then close????


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 100,380 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell No 33,600 miles
    

3Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Wed Sep 04, 2019 5:22 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
You must have a later comfort seat with the bulge under the pan for more front seat padding.  You can remove the tool tray for clearance, but I think that requires a different housing for the ECU.  Possibly just remove the tray lid.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Wed Sep 04, 2019 5:55 pm

volador

volador
Gold member
Gold member
Here is some of Duck's "Seat-a-palooza" offerings.

http://www.bmwkbike.dx.am/CLseats/kbikeseats.htm

Shows the pre-1986 has the incorporated handles as part of the seat pan, metal or plastic seat pan does not matter. The pre-86 Corbin seat does not have the incorporated handles. The pan is extended in that area.

Offerings currently on the interwebs across the pond

https://www.ebay.com/itm/Seat-Saddle-for-1985-BMW-K100/123890994573?hash=item1cd87a8d8d:g:FPsAAOSwqOFb2I1i

https://www.ebay.com/itm/BMW-1985-K100-CORBIN-Dual-Canyon-Touring-SEAT-K100-K100RS-K100RT-K-75/321547217333?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D40718%26meid%3D2689893ae07b47089220e4b51078d982%26pid%3D100012%26rk%3D1%26rkt%3D12%26sd%3D123792332382%26itm%3D321547217333%26pmt%3D0%26noa%3D1%26pg%3D2047675&_trksid=p2047675.c100012.m1985

https://www.ebay.com/itm/BMW-K100-SEAT-FROM-1985/323902702088?hash=item4b6a1b0208:g:aW8AAOSwy2pdbXzO



Last edited by volador on Wed Sep 04, 2019 6:24 pm; edited 1 time in total


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

5Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Wed Sep 04, 2019 6:18 pm

duck

duck
Life time member
Life time member
You need a low seat brain(L-Jetronic/ECU) holder if the seat pan sticks down into the frame.

#9 here: http://bit.ly/2ly4ouA


__________________________________________________
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
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    


7Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Wed Sep 11, 2019 11:21 am

Poupy

Poupy
active member
active member
It might just be a matter of hinges adapted to the seat base. Because on the bike frame, the hinge holding points are the same whatever the bike year/seat design.

I did it the other way through: I have a k1100 which had a so called comfort seat. That seat had a plastic base.

As that comfort seat is not comfortable at all in case of long legs, I looked for a better design and found it in Motorworks here, Ref SEA50646

That one, which permits to be sitted 7cm further back has a steel base. The thing to do to adapt it on my k1100 was just to fit the hinges corresponding to that type of base. So I assume that it also works in the other direction.

Contact Motorworks, they know their business and will probably wish to keep their reputation when guiding you, even if you purchased your seat elsewhere and are just candidate to the purchase of hinges...

    

8Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Thu Sep 12, 2019 6:21 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
My 92 K100LT has a Comfort seat and it very much lives up to its name. It does not have the projection underneath so still has the tool tray. For me, 5' 8" I found it quite high but extremely comfortable. The K1100 seat is considerably lower and much more manageable.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 100,380 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell No 33,600 miles
    

9Back to top Go down   Wrong Seat Empty Comfort seat conversion on Mon Sep 23, 2019 8:12 pm

SteveWilson

SteveWilson
active member
active member
I've just fitted a comfort seat which I think must be a K1100 type as it has the lump underneath.
Forums suggest you can cut the lump out but that sounded a bit vicious to me - I took the lid off my toolbox tray and cut the tray down by about an inch. All fits and can still get a few bits in the tray. Mine has a horrible rubber pad thing in the rear hinge which makes it feel a bit loose - till I sit on it :-)
Cheers
Steve

    

10Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Mon Oct 21, 2019 5:18 am

tinyspuds

tinyspuds
Platinum member
Platinum member
Apologies for jumping in on this thread, but I wanted to test my understanding.
Retrofitting a post 86 seat to a pre 86 bike needs mods as the later pan has a lump and the hinges are different?

I have an 85 metal pan seat which I have memory foamed and recovered, so I wouldn’t want to get rid. 

I have just bought  91 k1100 fairing in really good cosmetic shape and there may be an opportunity to get the matching seat cowl.

Can this mix and match work? I assume I end up with two grab brackets and would need to do something clever with hinges, but will the seat fit otherwise with no gaps back and front? Anyone know or done it?
Cheers.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

11Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Mon Oct 21, 2019 5:31 pm

Davep

Davep
Silver member
Silver member
No apologies necessary. However, I can only give you my own experience, but, I'm sure that the great and wise on here will be able to give much better advice than me.

I found that when I tried to fit the 1100 seat there were issues, firstly I had the issue with the lump, I did look in to cutting the lump off but though that was a bit much, So, I removed the tool tray lid, Yes it did fit, but, there seemed to be space a the rear of the seat, and not good space. It just looked like it didn't fit or belong, then the hinges needed relocating and then the rear grab rails would need some cleaver fixing. So..

In the end I bought a stock RS seat, not the most comfortable, but at least I knew it would fit without any issues! I will look in to something more comfortable before I head off to Europe, but for now, It looks great and does the job!

Not sure if this helps you, but, I'm starting to collect a lot of K parts that don't fit my K!!!! Maybe I should buy another K!  What a Face

Dave


__________________________________________________
Wrong Seat Eu-log10 BMW K100RS 1983 (Main ride)
                      Suzuki GSX 750 ET 1979 (Needs work)
                      Kawasaki Zephyr 750 1992 (Needs hiding)
    

12Back to top Go down   Wrong Seat Empty Re: Wrong Seat on Mon Oct 21, 2019 5:40 pm

tinyspuds

tinyspuds
Platinum member
Platinum member
@Davep wrote:
Not sure if this helps you, but, I'm starting to collect a lot of K parts that don't fit my K!!!! Maybe I should buy another K!  What a Face

Dave
Subconciously, you already are. Sneaky stuff K pox  Very Happy .
Thanks for the feedback.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

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