BMW K bikes (Bricks)

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Time To Ride

Time To Ride
Silver member
Silver member
I going to widen the handle bar on my K75S to make it more maneuverable at slow speeds and just pushing it around. At a smidgen over 500 lbs it is harder to deal with the  the r1150GS and just shouldn't be, getting old here.  There is quite a few threads on here about this but it's a little bit here/a little bit there.  robmacks post was the gem that fixed it for me, all there and I know what I am going to do.
   I am going to remove the 1" back/1" up risers and go with Flanders/ 5/6/ then trim the bar ends back 2" or so.  With luck I may be able to keep the exiting cables.  Does anybody see a downside to this.

   Flanders   BMW Handlebars by Flanders Bars (sideroadcycles.com)

   Thanks robmack

    Al

     robmack's post
The following was the results of my research to locate handlebars for my project bike:

Handlebar Measurements
All measurements are made in normal riding position.

Height or Rise: Total height measured in a level plane.

Pull Back: Vertical lines from the furthest forward to rear in a level plane.

Center Width: Straight flat section before the start of the bends.

Width: Total overall tip to tip width, no grips or bar end weights.

Height:
Early S ----2 3/4"
Late S -----2 3/4"
C -----------4 3/8"
RT & T -----5 3/4"
Flanders /5 /6 (B21) chrome ------- 4 1/2”
Flanders R90S (C20) chrome ------ 3”
Bikemaster LTD ------------------------ 4 3/4”
Emgo Euro 23-12563 -------------------2”  <--- This is what was purchased. Similar to R90S (C20) bars


Total Pull Back:
Early S -----5 1/8"
Late S ------5 5/8"
C ------------6 1/8"
RT & T ----10 3/8"
Flanders /5 /6 (B21) chrome ------- 9 1/2”
Flanders R90S (C20) chrome ------ 4 3/4”
Bikemaster LTD ------------------------ 7 1/4”
Emgo Euro 23-12563 -----------------5 1/2”

Width:
Early S -----23"
Late S ------24"
C ------------25 3/4"
RT & T ------27"
Flanders /5 /6 (B21) chrome ------- 28 3/4”
Flanders R90S (C20) chrome ------ 25 1/4”
Bikemaster LTD ------------------------ 30”
Emgo Euro 23-12563 -----------------  29 1/2”

Center:
Early S ------4 3/4"
Late S -------4 3/4"
C -------------5"
RT & T -------5"
Flanders /5 /6 (B21) chrome ------- 4 1/2”
Flanders R90S (C20) chrome ------ 4”
Bikemaster LTD ------------------------ 4 3/4”
Emgo Euro 23-12563 ----------------- 4 3/4”


Diameter:
Bikemaster and Emgo bars are 7/8" OD (.867"measured 22.12mm)
Flanders and BMW bars are 22mm exactly
S bars are .695-.700" ID

C, RT, & T bars are .615-.622" ID



Last edited by robmack on Sat Nov 02, 2013 5:02 am; edited 1 time in total


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

Laitch

Laitch
Life time member
Life time member
Time To Ride wrote: Does anybody see a downside to this. 
The only one I see is trimming the bars too much so they can't accommodate the OEM switch gear and front brake master cylinder.


__________________________________________________
1995 K75 81,000 miles
K75S  Handlebar Dimension Measurement Comparison  Usa-lo10
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Carpenter, "I've been cutting this bloody plank all day and it's STILL too short!"


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, #1 '06 K1200R, #2 '06 K1200R, '07 K1200R, '09 K1300GT, '13 R1200RT-P & 2022 S1000XR

"Do you ever read any of the books you burn?" "That's against the law!" "Oh, of course."
~Ray Bradbury, science-fiction writer (22 August 1920 - 2012)
    

Time To Ride

Time To Ride
Silver member
Silver member
Yes,  measure twice cut once!

   The new bar is 4 3/4" wider with a 5" more pull back then stock so there is lots of bar to play with when it comes time to do the cutting, doesn't mean I can't mess it up but....  The angle will be sharper at my wrists but it worked for the 5/6/ folks.
   Had a thought that the I.D. of the pipe may be wrong for the bar end and the tightening device.  Could not find info on the ID so rolled the dice and ordered the bar, my be a field fit thing I guess.


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Time To Ride wrote:Yes,  measure twice cut once!

   The new bar is 4 3/4" wider with a 5" more pull back then stock so there is lots of bar to play with when it comes time to do the cutting, doesn't mean I can't mess it up but....  The angle will be sharper at my wrists but it worked for the 5/6/ folks.
   Had a thought that the I.D. of the pipe may be wrong for the bar end and the tightening device.  Could not find info on the ID so rolled the dice and ordered the bar, my be a field fit thing I guess.
BMW K & Airhead 'bars are 22mm diametre, almost everyone else is 7/8" (22.225mm)or a red pubic hair thicker than 22mm.


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, #1 '06 K1200R, #2 '06 K1200R, '07 K1200R, '09 K1300GT, '13 R1200RT-P & 2022 S1000XR

"Do you ever read any of the books you burn?" "That's against the law!" "Oh, of course."
~Ray Bradbury, science-fiction writer (22 August 1920 - 2012)
    

Time To Ride

Time To Ride
Silver member
Silver member
22mm O.D. , my worry is the inner dimension, how thick is the wall of the pipe Flanders used compared to BMW.  If the wall is more then a little thicker the bar end may not fit, if it is thinner it may not tighten (doubt this).  I have seen no mention of this in my searching, just looking for things to worry about.  Shocked


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Time To Ride wrote:22mm O.D. , my worry is the inner dimension, how thick is the wall of the pipe Flanders used compared to BMW.  If the wall is more then a little thicker the bar end may not fit, if it is thinner it may not tighten (doubt this).  I have seen no mention of this in my searching, just looking for things to worry about.  Shocked
Flanders 'bars have been used by BMW riders for yonks. I often reached for their catalogue before others for replacement BMW Airhead 'bars for myself and for customers. I reckon you'll find that they are no different in I.D. than the Magura 'bars BMW often came stock with.


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, #1 '06 K1200R, #2 '06 K1200R, '07 K1200R, '09 K1300GT, '13 R1200RT-P & 2022 S1000XR

"Do you ever read any of the books you burn?" "That's against the law!" "Oh, of course."
~Ray Bradbury, science-fiction writer (22 August 1920 - 2012)
    

Time To Ride

Time To Ride
Silver member
Silver member
Flanders 'bars have been used by BMW riders for yonks. I often reached for their catalogue before others for replacement BMW Airhead 'bars for myself and for customers. I reckon you'll find that they are no different in I.D. than the Magura 'bars BMW often came stock with.


Thanks TWB   Looks like I will have to find something else to worry about!


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

9Back to top Go down   K75S  Handlebar Dimension Measurement Comparison  Empty K75 Bars Wed Mar 10, 2021 5:08 pm

SteveWilson

SteveWilson
active member
active member
I was keen to do something just to gain an inch or two - even adding bar end weights for instance but was put off by the fact that the heated grip wires went in from the outer ends so would get  ruined

    

Time To Ride

Time To Ride
Silver member
Silver member
SteveWilson wrote:I was keen to do something just to gain an inch or two - even adding bar end weights for instance but was put off by the fact that the heated grip wires went in from the outer ends so would get  ruined

   No heated grips on my bike, would be nice though.  Maybe splice some more wire onto the power end and then the install would be the same?


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

TacKler

TacKler
Life time member
Life time member
My concern would be the cable lengths required.  

Using the dimensions provided above, if you trim 2" off both ends of the stroke 5 or 6 bars then you would be a smidgeon wider than the S bars currently fitted.  That may still cause a problem as the bars are swept further back than the original S bars adding some required length to the cables.  

If you are widening the bars to allow greater manoeuvrability then one of the popular modifications for the 75S was to fit 75C bars.  However C bars are hard to come by.  It was also recommended that you fit the longer cables when doing this.   

A quick squiz at Motobins identifies the clutch cable lengths as: 

  • S/RS = 1510mm 
  • C/RT = 1625mm 


So with a difference in length of 115mm I would be inclined to fit the longer cables as well to prevent any control restriction.  

I have a 75S with C bars fitted and in comparison to my standard S, the C would appear to have the longer cables fitted.  

Hope this helps.


__________________________________________________
Red 1991 K75S
    

Time To Ride

Time To Ride
Silver member
Silver member
Thanks for taking the time TacKler it does help.  I should have looked into this closer and now what I see is a problem, to achieve the extra width (leverage) I want I will not be cutting anything off of that bar but that means living with the full pull back.   Not what I wanted to do, I drew it up and we are talking wheel barrow handles in my lap 😊  The extra 4” with the RT cables will probably work being only half an inch to short but…….  The bars are almost here so gong to see how works, will give it a try.
 
   
K75S  Handlebar Dimension Measurement Comparison  Compar11


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

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