BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   6-gear K1100 Empty 6-gear K1100 on Fri Jun 21, 2019 8:15 am

Arlina

Arlina
Life time member
Life time member
Got a new braincracker;
I remember I read somewhere someone has managed to get the K1200 6-gear into a 5-gear K75/100/1100 housing.
But that's all I know.

Someone shine a light for my old brain? Very Happy Idea


__________________________________________________
6-gear K1100 Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde
    

2Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 1:00 pm

brickrider2

brickrider2
Life time member
Life time member
I've never heard of such a modification Arlina.  However, your question raises one of my own.  I wonder why someone would find a 6-speed transmission in a K1100 to be a desirable thing.  I had a modern Japanese bike with such a transmission and frankly, I found that I don't like having to shift so often.  K-bikes (all BMWs, really) have broad power bands that make them easy to ride and give good performance with 5 speeds.  What would be gained with a 6th? 
Extracting maximum power from small engines dedicated to competition -- yes, I see the worth of many speeds in the gearbox, but for BMW road bikes?  What am I missing here?


__________________________________________________
1996 K1100LT
    

3Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 1:52 pm

Ringfad

Ringfad
Life time member
Life time member
TWB has some interesting comments on the 6 speed box in this thread

http://www.k100-forum.com/t8933-big-block-k100


__________________________________________________
6-gear K1100 Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 51K Km     ;BMW; K1100RS Red 1993 70k miles  ;BMW; K100 16V Black (ex ElectricMonk)
    

4Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 2:05 pm

Laitch

Laitch
Life time member
Life time member
@Arlina wrote:I read somewhere someone has managed to get the K1200 6-gear into a 5-gear K75/100/1100 housing.
@brickrider2 wrote: K-bikes (all BMWs, really) have broad power bands that make them easy to ride and give good performance with 5 speeds.  What would be gained with a 6th?
I've only read here of TWB's K1200 engine swap into K100RS frame.

In my experience, the purpose of sixth gear is to lessen vibration of a moto at expressway cruising speed. Its use increases the rider's comfort and also tends to increase fuel economy.


__________________________________________________
1995 K75T 73,000 miles
6-gear K1100 Usa-lo10
    

5Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 3:21 pm

duck

duck
Life time member
Life time member
The only real advantage would be to get better mileage at high speed. I ride pushing 90 MPH in Montana where the interstate speed limit is 80 so you can go that fast without getting a ticket.  If you keep the throttle bodies sync'd then vibration isn't an issue but once you get up around 80 and above on a K1100 the mileage noticeably decreases.


__________________________________________________
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
    

6Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 9:04 pm

robmack

robmack
Life time member
Life time member
I think Larry Romestandt has done that but it's not a straight-forward swap.  You have to adapt the hydraulic clutch and fool around with the starter motor IIRC. Larry's an ex-aerospace engineer so what's impossible for us mere mortals is BAU for him.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

7Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Fri Jun 21, 2019 9:13 pm

duck

duck
Life time member
Life time member
@robmack wrote:I think Larry Romestandt has done that but it's not a straight-forward swap.  You have to adapt the hydraulic clutch and fool around with the starter motor IIRC. Larry's an ex-aerospace engineer so what's impossible for us mere mortals is BAU for him.

Yeah, Larry does a bit more than swaps. Laughing  For the K-Gusta he custom designed the rear wheel in CAD and then 3-D printed a mockup before he built it.


__________________________________________________
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
    

8Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Sat Jun 22, 2019 4:14 am

Arlina

Arlina
Life time member
Life time member
Logic explained; "Does it fit? No? Get lost..."
Diehard explained; "I bet you wrong!"

It was really about fitting the inside of the 6-gear into the 5-gear housing.
Had a link to the page of the builder, before a big harddisk crash Sad


__________________________________________________
6-gear K1100 Eu-log10  K1100RS/LT - R1200RT - R1100RS (RIP) - Cagiva SST 350 Ala Verde
    

9Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Sat Jun 22, 2019 8:20 am

RicK G

RicK G
VIP
VIP
I will say quite confidently that it would nigh on if not totally impossible.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

10Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Sat Jun 22, 2019 8:42 am

Laitch

Laitch
Life time member
Life time member
@Arlina wrote:It was really about fitting the inside of the 6-gear into the 5-gear housing.
Your recollection could be of an R1200C final drive gear swap which has arisen in a few discussions concerning sixth gear conversions. The owner who managed that was satisfied with the outcome.


__________________________________________________
1995 K75T 73,000 miles
6-gear K1100 Usa-lo10
    

11Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Sat Jun 22, 2019 10:04 am

duck

duck
Life time member
Life time member
Some "improvement" on that front can be had by swapping in a slightly taller K1 final drive on a K1100.

FD gear ratios:
K1100LT - 32/11=2.91
K1100RS - 31/11=2.82
K1 - 33/12=2.75


__________________________________________________
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
    

12Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Mon Jun 24, 2019 4:44 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@duck wrote:Some "improvement" on that front can be had by swapping in a slightly taller K1 final drive on a K1100.

FD gear ratios:
K1100LT - 32/11=2.91
K1100RS - 31/11=2.82
K1 - 33/12=2.75

You can get considerably taller, I think its the R1200LC inners will fit into the Paralever final drive housing. I was sent a full spec on this some time back with specific model and part nos.

As for 6 speed inners into 5 speed, it don't go. Ben Kingham at BSK investigated that one. Gearbox swap is not an option due to the frame change.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 96,650 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell
    

13Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Mon Jun 24, 2019 8:45 pm

Pegasus

Pegasus
Silver member
Silver member
That was done by Gary Bennett here in Brisbane.
He is a forum member.
It is in a 94 Mystic Red (the best colour) K1100RS.

    

14Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Tue Jun 25, 2019 12:35 am

RicK G

RicK G
VIP
VIP
I would like to see more as I have a 1200RS engine to go in the K1100 and was thinking of a six speed. Do you have a contact for Gary.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

15Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Tue Jun 25, 2019 5:02 pm

Laitch

Laitch
Life time member
Life time member
@RicK G wrote:I would like to see more as I have a 1200RS engine to go in the K1100 and was thinking of a six speed. Do you have a contact for Gary.
He's a member here—GB777.


__________________________________________________
1995 K75T 73,000 miles
6-gear K1100 Usa-lo10
    

16Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Tue Jun 25, 2019 10:08 pm

RicK G

RicK G
VIP
VIP
It is the rear drive he swapped. Put a 2.53 gear set from a R1200C into a pars lever K1100.
I have a set of 2.62 gears from a K1200RS and it gets a very small decrease in fuel consumption and gets the buzz out of the 100kmph speed range.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

17Back to top Go down   6-gear K1100 Empty Re: 6-gear K1100 on Thu Jun 27, 2019 7:04 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@RicK G wrote:It is the rear drive he swapped. Put a 2.53 gear set from a R1200C into a pars lever K1100.
I have a set of 2.62 gears from a K1200RS and it gets a very small decrease in fuel consumption and gets the buzz out of the 100kmph speed range.

That 2.53 is the one I was told but you need to carefully check the part no and model because it seems to be different in different areas.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 96,650 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum