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1Back to top Go down   Reducing height of K75S Empty Reducing height of K75S Sat Dec 19, 2015 4:23 am

BooG

BooG
Platinum member
Platinum member
Morning!
I have recently replaced the shock on the K75 with a Hagon which has reduced the height in a positive way. I am wondering:I have to replace my rear tyre, so could I use a 130/80/17 tyre instead of the 130/90/17 currently in use, to further reduce the height?
Thanks.

    

2Back to top Go down   Reducing height of K75S Empty Re: Reducing height of K75S Sat Dec 19, 2015 4:47 am

charlie99

charlie99
VIP
VIP
couldn't hurt

might change your actual speed reading to the calibrated setup ex factory  (figuring that it will show a few steps higher speed than what you are actually doing  )

if you want to recalibrate at some time ....search the forum for the utility karumba ...found here   https://www.k100-forum.com/t9583-karamba-speedo-software   edit .... oops sorry try this link   https://www.k100-forum.com/t2038-karamba-speedometer-calibration-program-tutorial

just be aware

good luck



Last edited by charlie99 on Sat Dec 19, 2015 5:32 am; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OReducing height of K75S Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

3Back to top Go down   Reducing height of K75S Empty Re: Reducing height of K75S Sat Dec 19, 2015 4:52 am

BooG

BooG
Platinum member
Platinum member
Very Happy Thanks. I'll go with the 130/80/17. There was one on the bike when I first got it 5 years ago. I'll keep an eye on the speedo!

    

4Back to top Go down   Reducing height of K75S Empty Re: Reducing height of K75S Sat Dec 19, 2015 12:21 pm

robmack

robmack
Life time member
Life time member
You're changing the geometry of the motorcycle by installing a shorter shock and contemplating a smaller tire.  You might have to compensate for the rear end changes by raising the stanchions in the triple clamp an appropriate amount.  The changes you made will affect front trail and consequently steering, as well it could affect spline wear, rear swingarm travel, sag and other characteristics that will affect handling and safety.  Tread carefully.


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

5Back to top Go down   Reducing height of K75S Empty Re: Reducing height of K75S Sat Dec 19, 2015 4:15 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Another consideration on lowering the bike is how far you have to lift it to get onto the centerstand.  I just raised my recently purchased K75S to the stock height because it was such a bitch to get on the centerstand.  Previous owner had dropped the front end about 13mm and the rear about 20mm by using a shock with a shorter shaft.

Lifting about 220kg an additional 17mm can be pretty hard.  Just be aware that there is a downside to lowering the bike.


__________________________________________________
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
    

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