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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Enfield on August 12, 2017, 01:34:54 AM

Title: Longer Shock Absorber on k100?
Post by: Enfield on August 12, 2017, 01:34:54 AM
Hi.
 I am about to finish my k100 project…but the YSS Shock Absorber I got seems a bit short ( 350 mm / 13.7 inch) and it is not adjustable as I thought.. Anyone know how much I can add to the height without compromising drivetrain? I am 6.6 and the K is way to low as it is know. If anyone has one to recommend it would also be great.
Regards
Christian
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 12, 2017, 01:37:24 AM
And a pic of the project ...
(https://uploads.tapatalk-cdn.com/20170812/7ff15cce0c11fb40cb11d65406071a90.jpg)(https://uploads.tapatalk-cdn.com/20170812/5abe4e9853a0840c9b1c0de783fcbda3.jpg)


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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 12, 2017, 02:28:25 AM
Did some more reading - seems to me that I should find one for a K1100!

Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on August 12, 2017, 04:29:19 AM
Did some more reading - seems to me that I should find one for a K1100!
You should also enquire about the optional ride height adjuster that allows a further 10mm adjustment to the height.
Title: Re: Longer Shock Absorber on k100?
Post by: Filmcamera on August 12, 2017, 09:11:15 AM
The standard shock on any of the paralever bikes is longer than on the monolever so a shock from a K100 16v wold also work for you
Title: Re: Longer Shock Absorber on k100?
Post by: Martin on August 12, 2017, 03:54:30 PM
Changing the shock will not alter the relationship between you and the pegs. The only way to do that is to lower the pegs or raise the seat. A longer shock will alter the handling. It will also give you more cornering clearance. What are you trying to achieve with the addition of a longer shock?
Regards Martin.
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 12, 2017, 04:47:38 PM
Changing the shock will not alter the relationship between you and the pegs. The only way to do that is to lower the pegs or raise the seat. A longer shock will alter the handling. It will also give you more cornering clearance. What are you trying to achieve with the addition of a longer shock?
Regards Martin.
I need to lift the rear a bit more - the wheel is very close to the " fender"? ( is it Called that? ) I plan to use it on other than paved roads - and fear that the wheel will get in contact with the fender. Pic explains better I guess ;-)



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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 12, 2017, 04:49:17 PM
(https://uploads.tapatalk-cdn.com/20170812/eccd99bcfa97e7774d802bdf658b2ac9.jpg)


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Title: Re: Longer Shock Absorber on k100?
Post by: Martin on August 12, 2017, 04:50:51 PM
 :2thumbup:
Regards Martin.
Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on August 12, 2017, 08:32:48 PM
(https://uploads.tapatalk-cdn.com/20170812/eccd99bcfa97e7774d802bdf658b2ac9.jpg)


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Is that the clearance measurement from the tire to the fender when you are sitting on the bike, Enfield?
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 13, 2017, 01:08:51 AM
Is that the clearance measurement from the tire to the fender when you are sitting on the bike, Enfield?
If only it was.... that is unloaded.....


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Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on August 13, 2017, 04:42:50 AM
If only it was.... that is unloaded.....
It seems to me that the bike with its present layout is destined to be a paved road showpiece until the frame arc above the wheel assembly is somehow restored.

* k1100LT frame.jpg (52.3 kB . 720x299 - viewed 2326 times)

* Custom K, from The Foundry Motorcycles.jpg (82.7 kB . 640x427 - viewed 2335 times)
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 14, 2017, 01:15:05 PM
I will give it a go with a longer shock - the one on the last pic looks great but will never be Street legal around here...


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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 14, 2017, 01:16:19 PM
I Can see why some just cut off the rear arc... but I would be worried about strenght


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Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on August 14, 2017, 02:20:23 PM
the one on the last pic looks great but will never be Street legal around here...
Why wouldn't it be street legal? Will yours be street legal?
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 14, 2017, 02:24:38 PM
You are allowed only to make small alterations to the frame - and only behind the schock..at least here in Denmark.


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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 14, 2017, 02:32:12 PM
Like cutting off rear Arch and replace it with something of similar thickness and strenght


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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 14, 2017, 02:35:56 PM
If not for the rules and regulations around here this would be the shortest Way to go
(https://uploads.tapatalk-cdn.com/20170814/a53929b9a88992d8e51b863ce7b7b6c0.jpg)


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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 19, 2017, 12:09:44 PM
(https://uploads.tapatalk-cdn.com/20170819/b5964e71aff122a5aa3d80890613a330.jpg)
Thanks guys - the k1100 shock did the trick. Maybe I need to change the plastic fender - that is easy :-)


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Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on August 19, 2017, 12:41:54 PM
the k1100 shock did the trick. Maybe I need to change the plastic fender - that is easy
What is the wheel clearance measurement now when you are seated on the bike, Enfield?
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 19, 2017, 01:00:08 PM
What is the wheel clearance measurement now when you are seated on the bike, Enfield?
I have the shock in the second " hardest" notch - gives me about 12 cm to the frame..


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Title: Re: Longer Shock Absorber on k100?
Post by: Filmcamera on August 19, 2017, 05:30:48 PM
It looks much better but to my eye still somehow low in the rear compared to most K bikes.   Did you do any frame mods etc?
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on August 20, 2017, 12:35:55 AM
It looks much better but to my eye still somehow low in the rear compared to most K bikes.   Did you do any frame mods etc?
Nothing else but cutting off the rear and welding on a New rear arch. Did not change angle or anything. Guess I just have to keep suspension rock Hard when going off Road


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Title: Re: Longer Shock Absorber on k100?
Post by: LaBruttaBestia on September 05, 2017, 05:18:33 PM
Nothing else but cutting off the rear and welding on a New rear arch. Did not change angle or anything. Guess I just have to keep suspension rock Hard when going off Road


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Ciao Enfield, to get that certified did you happen to run across any document from BMW that states that the rear frame isn't necessary for the stability of the motorcycle?

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Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on September 05, 2017, 11:51:44 PM
No sorry - around here it can pass inspection …. just be sure who you chose to do the inspection…
 Do you need it to get yours on plates?
I have been thinking about just cutting the rear off without welding another piece on on my next project and then make some "bushes" in a lathe that allows for the original rear to be mounted for inspection? Have everything powder coated - would be hard to see if it was done with great care.
 Would be great if someone with more knowledge about had anything to say about stability in the frame if one did that? Looks kind of ok without any rear and allows for more rear wheel travel? Like the attached pic earlier in this thread.
Regards
Chr
Title: Re: Longer Shock Absorber on k100?
Post by: Laitch on September 06, 2017, 10:36:50 AM
around here it can pass inspection …. just be sure who you chose to do the inspection…
That's probably a global condition although in some areas it might take lubrication with additional cash to smooth out the process.

Reminds me of a rural mechanic up here who did inspections for the state. He was an anti-government, self-directed kind of guy way off the beaten path and many of us with dilapidated rides and not much money could get our equipment passed by him. A few years of visiting him ended when I showed up and read a note written on the back of a greasy receipt taped to his shop office door. The lights were out. The place was empty. The note read:

NO DAMMED STICKERS

Another unintended consequence of generosity.
Title: Re: Longer Shock Absorber on k100?
Post by: bocutter Ed on September 06, 2017, 11:13:37 AM
Reminds me of a rural mechanic up here who did inspections for the state.
We had one who would come to your door until some idjot posted his info on a local forum.

Shows up in Feb on an older Harley. "Is it for sale or to ride"

a) "For sale" Gets out the fine toothed comb ...

b) "For me to ride" Fills out form ...
Title: Re: Longer Shock Absorber on k100?
Post by: LaBruttaBestia on September 06, 2017, 04:46:38 PM
No sorry - around here it can pass inspection …. just be sure who you chose to do the inspection…
 Do you need it to get yours on plates?
I have been thinking about just cutting the rear off without welding another piece on on my next project and then make some "bushes" in a lathe that allows for the original rear to be mounted for inspection? Have everything powder coated - would be hard to see if it was done with great care.
 Would be great if someone with more knowledge about had anything to say about stability in the frame if one did that? Looks kind of ok without any rear and allows for more rear wheel travel? Like the attached pic earlier in this thread.
Regards
Chr
Yeah, I haven't cut yet as the certification has to be done to specs. So depending what I find I'll modify the frame accordingly. Nice job on the build BTW.


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Title: Re: Longer Shock Absorber on k100?
Post by: Garz on November 02, 2023, 08:41:43 AM
@Enfield how have you found the suspension high since installing? I'm considering the same.
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on November 03, 2023, 03:42:04 AM
I think it is great! But if you consider cutting the frame...I would surely make a upward bent on the loop. I am still having an occasional tyre rub if I go too fast in bumpy terrain!!
Title: Re: Longer Shock Absorber on k100?
Post by: Garz on November 03, 2023, 08:28:40 AM
Thanks for the feedback mate. I have been considering that aswell. Have U tried riding with a pillion and do you find it handles ok if with the longer travel?
I'm about to place an order on the YSS ecoline shock.
Title: Re: Longer Shock Absorber on k100?
Post by: Enfield on November 03, 2023, 09:10:38 AM
I do ofren ride with pillion… that is ok! Passenger is around 64 kg - I am 110 kg. It handles perfectly fine! But again - if I were to do the build again I would have made an upward bend on the loop! But it works.