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1Back to top Go down   K75 shock on a k1100  Empty K75 shock on a k1100 Thu Jun 30, 2016 4:40 am

Johnny kidd

Johnny kidd
active member
active member
Hi all, I recently bought a k1100. It's driving fine but I find I an getting backache after longish rides, I notice that the suspension is very hard over bumps. I have adjusted the rear shock but it's still affecting my back.  I am wondering if the 13" shock from my k75 will fit the k1100, the k1100 shock is 14". I am 5"11 and weigh just over ten stone. Is this usual for the k1100 rear suspension to give people these issues?

    

2Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Thu Jun 30, 2016 5:41 am

92KK 84WW Olaf

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Hi Johnny

Not sure about that one but at 10 stone you don't qualify as a Harley rider so it should not have much preload on if you have got a standard BMW rear shock on the K1100. The K1100 shock I presume has preload options but possibly you have some other issues with it.

If you are doing a replacement I had a K1100 rear shock in my possession some months back, to put on the K100 as a temporary measure. It would apparently fit so presumably the K75 will fit yours. The difference in length on the K75 unit will leave your rear end sitting a little lower and will alter the handling but I expect it will be softer.

Have a look at YSS rear shocks. I got one for the K100RT and very impressed with it. I have very little preload set up in it and increased it a little for carrying the camping gear. It as a vast improvement.

However also do have a look at your handlebar positioning, consider bar risers.


__________________________________________________
1992 K100LT 0193214 Bertha 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 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Thu Jun 30, 2016 7:08 am

Rick G

Rick G
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Its the spring and compression damping that will make the ride harsh. The best shock I have used is the RAM from http://www.realmengineering.com/page15.html

A K100/75 shock will not solve the problem, they have basically the same characteristics just that one is 30mm longer.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

4Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Thu Jun 30, 2016 10:12 am

Holister

Holister
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Life time member
Johnny kidd wrote:Hi all, I recently bought a k1100. It's driving fine but I find I an getting backache after longish rides, I notice that the suspension is very hard over bumps. I have adjusted the rear shock but it's still affecting my back.  I am wondering if the 13" shock from my k75 will fit the k1100, the k1100 shock is 14". I am 5"11 and weigh just over ten stone. Is this usual for the k1100 rear suspension to give people these issues?
are you riding an RS or an RT? What's a "longish ride"?
An RS may give you back problems because the bars are much lower.
Lowering the rear with a shorter shock would only benefit someone with shorter legs.


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 K75 shock on a k1100  Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

5Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Thu Jun 30, 2016 5:46 pm

Johnny kidd

Johnny kidd
active member
active member
Thanks for the replies lads much appreciated,  I adjusted the preload today and now I have working rear suspension  Laughing
I find the ergonomics on the k1100lt which is the model I bought a lot tougher on my back and knees than my k75s, time will tell Wether I keep it or not.

    

6Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Thu Jun 30, 2016 6:18 pm

sidecar paul

sidecar paul
Life time member
Life time member
The 75's do have a 'softer' spring than the 100's, with a wire diameter of 9mm compared to 9.86mm.

Just a thought.
Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

7Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Fri Jul 01, 2016 5:01 am

charlie99

charlie99
VIP
VIP
Johnny kidd wrote:Hi all, I recently bought a k1100. It's driving fine but I find I an getting backache after longish rides, I notice that the suspension is very hard over bumps. I have adjusted the rear shock but it's still affecting my back.  I am wondering if the 13" shock from my k75 will fit the k1100, the k1100 shock is 14". I am 5"11 and weigh just over ten stone. Is this usual for the k1100 rear suspension to give people these issues?
possibly and likely ... the shock is cactus

I changed my rear shock to something different ..... and an amazing difference was noticed straight away .

so possibly ..like all old bikes, the replacement might be a good thing regardless of the height differences


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OK75 shock on a k1100  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 ..
    

8Back to top Go down   K75 shock on a k1100  Empty Re: K75 shock on a k1100 Fri Jul 01, 2016 5:44 am

92KK 84WW Olaf

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Life time member
Life time member
sidecar paul wrote:The 75's do have a 'softer' spring than the 100's, with a wire diameter of 9mm compared to 9.86mm.

Just a thought.
Paul.

Thanks Paul, that's a very useful bit of information for lighter K100 riders. I have very little preload on the YSS shock I am now using, started off with zero and have only adjusted twice, first was to set up for myself, then a second one for camping trip with all the gear on but still very little preload used.


__________________________________________________
1992 K100LT 0193214 Bertha 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 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

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