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1Back to top Go down   Rear swingarm exchange Empty Rear swingarm exchange Mon Oct 14, 2019 5:13 am

Maecky

Maecky
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Hi

I have a 1990 k100 4V with the double joint rear swingarm.
Can i convert it to the rigide swingarm easily? What parts needed for the conversion?

Resin i want to Switch it because i want to convert it to the horizontal mounted shock als Lourenco and it days that the rigid swingarm should be used.

    

2Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 7:49 am

duck

duck
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Yes.

You need a monolever swing arm, final drive and drive shaft. (And a different shock.) The swing arm and drive shaft will work with your existing transmission without modification.

You need to figure out what final drive gear ratio you want. 32:10 from a K75 or 33:11, 32:11, 31:11 from a K100.


__________________________________________________
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
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

3Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 9:50 am

92KK 84WW Olaf

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@duck wrote:Yes.

You need a monolever swing arm, final drive and drive shaft. (And a different shock.) The swing arm and drive shaft will work with your existing transmission without modification.

You need to figure out what final drive gear ratio you want. 32:10 from a K75 or 33:11, 32:11, 31:11 from a K100.

If you are getting the Monolever final drive and the drive shaft from different places, make sure they are either both 16 spline or 20 spline as they are not interchangeable. Either will work with yours but they need to match each other. The 16 spline are on early Ks [K, K100RS and K100RT].....K100LT are all 20 spline.

I just had a quick look at my K100RS [monolever] and my K1100LT [Paralever] just check out the rear brake line from the caliper to the master cylinder. Mine are not same but the RS one was changed by the PO so not sure if the difference is due to him or BMW.


__________________________________________________
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 37,190 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
    

4Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 10:49 am

duck

duck
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92KK 84WW Olaf1 from a K100. wrote:
If you are getting the Monolever final drive and the drive shaft from different places, make sure they are either both 16 spline or 20 spline as they are not interchangeable. Either will work with yours but they need to match each other. The 16 spline are on early Ks [K, K100RS and K100RT].....K100LT are all 20 spline.

Get the 16 spline setup if you can. The splines wear less. It doesn't come in black though like some of the 20s do.


__________________________________________________
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
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

5Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 11:04 am

Maecky

Maecky
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Can i choose if i use 16 or 20 spline? Ist it relaxed to the gearbox Outputs schafft?

    

6Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 12:02 pm

duck

duck
Life time member
Life time member
All transmissions have the same output splines.

16 or 20 is the number of splines where the drive shaft connects to the final drive.


__________________________________________________
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
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

7Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 12:18 pm

Maecky

Maecky
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Thank you Gentleman

The second question is if the horizontal damper setup from lorenco will work with the paralever as well?

    

8Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 1:34 pm

Suzi Q

Suzi Q
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Well a few months ago a new member started a thread with his build project - which was going to use one of those horizontal shock conversions, on a paralever swingarm. I did ask whether it would be suitable, but he didn't respond. There's some picture on the thread which show it installed, but the thread seems to have died with no reports of it being finished.

???

https://www.k100-forum.com/t15340-k1100rs-by-wooboodoo


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

9Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 2:06 pm

Maecky

Maecky
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Chris846

Thank you for the link.

I also tried to contact retrorides Who made the horizontal damper System directly but also got no response.

    

10Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 3:44 pm

Suzi Q

Suzi Q
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Life time member
I was quite curious, because I'd only ever seen pictures of the Retrorides/Laurenco conversion fitted to a monolever, and it was my understanding that the paralever bevel box (and hence bottom shock mounting) moved in a completely different trajectory from the monolever. 
I even went as far as taking the shock off the paralever rear on my project bike, and measuring the distance from the shock bottom mounting to a fixed point on the frame, near to where the Retrorides linkage mount seems to be. I was quite surprised because I expected it to remain more or less constant throughout the range of suspension movement (hey, it's a para lever) but, the distance does reduce a fair bit as the suspension travels upwards, but not as much as it does on a monolever. Hence, the retrorides linkage thing would maybe stand a chance of working with a carefully chosen (i.e heavy rate) spring on the shocker.

If you can't get to the bottom of this, I'll re-measure the comparison between paralever and monolever. It's interesting.


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

11Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 5:06 pm

Maecky

Maecky
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Chris

I will take the spring off my paralever this weekend to measure. Would be great if you could measure again on the monolever. The Retrorides pictures state that the distance from the frame bolt to the bolt where the bellcrank is attached should be 109mm. So if we measure to 100mm from the Frame bolt we can compare the measurements.
I think suspension travel al the way down and all the way up should be comparable.

Thank you for your effort

    

12Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 5:30 pm

Suzi Q

Suzi Q
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The other thing is...
A paralever is 37mm longer than a monolever.
?


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

13Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 5:55 pm

Maecky

Maecky
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Hmm....maybe that's why the project in the link was stopped.

But it was hoocked up allready.
I need to check how the paralever is moving and resemble that in CAD and then see what it does with the retrorides parts.

    

14Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Mon Oct 14, 2019 7:20 pm

Maecky

Maecky
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active member

    

15Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Wed Oct 16, 2019 9:23 am

Maecky

Maecky
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active member
i found some Pictures of the retrorides kit fitted to a paralever as well.
also got the confirmation from a shop that sells the retrorides kit that it will fit the paralever as well.
we will see and i keep you updatetd

    

16Back to top Go down   Rear swingarm exchange Empty Re: Rear swingarm exchange Wed Oct 16, 2019 2:37 pm

Suzi Q

Suzi Q
Life time member
Life time member
I've seen some pictures too, a couple of bikes. They seem to have the swingarm almost horizontal, and the shock springs seem quite heavy. Hard to really tell from pictures though.
Also, there's lots of pictures of 'specials' out there in internet land, that might not really be ridden, or even look unrideable i.e no working brakes etc. 
Saw a lovely R1150 series custom at a bike show last year: Ohlins forks and rear suspension, lots and lots of expensive parts. Really took my eye. 
No wiring loom whatsoever. 
Absolutely not saying the paralever can't be done though.
(Measurements to follow this weekend)


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Sometimes I'm not really Suzi Quatro.
    

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