BMW K bikes (Bricks)


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1Back to top Go down    Rear shock replacement on Thu Nov 02, 2017 7:47 pm

yamaguzzi

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As I get more and more into this 88 K100 I'm thinking about what I can do to give it a better feel.The ride is harsh.I feel every bump in the road especially on concrete road .The rear shock looks to be stock and I adjusted it to the softest setting but it still sucks.I also think I might like to replace the fork springs ,at least change out the fork oil to something lighter.This bike hops over cracks in the road and if I hit a hole it's downright scary . I am thinking Progressive 412 .Anyone try these? Any recommendations of fork oil weight and amounts? In other news,I ordered the new shoes today .I went with the Avons and will be fitting them early next week when they arrive.


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1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://facebkfugitive.blogspot.com/
    

2Back to top Go down    Re: Rear shock replacement on Thu Nov 02, 2017 9:15 pm

RicK G

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Get a RAM from Realm engineering in UK.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

3Back to top Go down    Re: Rear shock replacement on Thu Nov 02, 2017 9:45 pm

Chocolate

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Hello!

This is a good and inexpensive shock.
BMW K 100 RT 1988 YSS Shock Absorber Adjustable Rear Mono Shock ME302-350T-01-X

Oil change is always good.


Cheers


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Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

4Back to top Go down    Re: Rear shock replacement on Fri Nov 03, 2017 12:56 pm

thecableguy

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@Chocolate wrote:Hello!

This is a good and inexpensive shock.
BMW K 100 RT 1988 YSS Shock Absorber Adjustable Rear Mono Shock ME302-350T-01-X

Oil change is always good.


Cheers
Not so inexpensive considering what they want to ship to the US... Almost as much as the shock itself...

ShockedShipping: GBP 110.00(approx.US $143.74)


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'86 K100RT "Brunhilde"
    

5Back to top Go down    Re: Rear shock replacement on Fri Nov 03, 2017 1:06 pm

92KK 84WW Olaf

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Buy the YSS shock from Germany........lot cheaper for shipping.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

6Back to top Go down    Re: Rear shock replacement on Fri Nov 03, 2017 4:02 pm

Laitch

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Call the YSS USA distributor with the part number and see what they come up with for shipping.
http://www.yssusa.com/order_how.html


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1995 K75T 68,000 miles
    

7Back to top Go down    Re: Rear shock replacement on Sat Nov 04, 2017 5:22 am

Born Again Eccentric

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@yamaguzzi wrote:....The ride is harsh.I feel every bump in the road especially on concrete road .The rear shock looks to be stock and I adjusted it to the softest setting but it still sucks.I also think I might like to replace the fork springs ,at least change out the fork oil to something lighter.This bike hops over cracks in the road and if I hit a hole it's downright scary . I am thinking Progressive 412 .Anyone try these? Any recommendations of fork oil weight and amounts? In other news,I ordered the new shoes today .I went with the Avons and will be fitting them early next week when they arrive.
I switched to RAM shocks on both my bikes and that made big difference - when one of my old original shocks was at the end of its life, the ride comfort became very harsh - of course, I didn't notice at first, because the degradation crept up on me and I just cursed the bumpy roads. Every bump, ripple and drain cover felt like I was bottoming out and the cornering capability left a lot to be desired. Due to the cost of a new shock, I was in denial for some time - blaming the road quality and not enjoying the ride, but eventually took a crowbar to my wallet and bought a RAM shock - holy cow, what a difference! Goes to show that you don't realise how bad something has become until you replace it.

I also have played with the fork oil to see if that softens the ride - standard grade is 10W. Add a little less than the recommended amount and the ride is a little softer (less oil means more air in fork to compress and a spongier ride). When draining the oil, you need to ensure that it is all gone before adding the measured amount...otherwise you can, in effect, over fill the fork which, of course leads to a harder ride (more oil, less air, hard ride) which is not at all comfortable. When I experienced a hard ride, I tried blending 10W fork oil with 5W oil to give a less viscous 7.5W mix. This seemed to improve things and soften the ride again, but since then I have reverted back to 10W oil and to be honest, I didn't really notice any difference. I reckon that the hard ride I experienced before was probably down to overfilling (adding measured amount of new oil on top of a little residual oil left in the forks after draining) and was down to my inexperience rather than the oil viscosity.

I have no experience of progressive springs up front or the YSS rear shock though.


__________________________________________________

Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

8Back to top Go down    Re: Rear shock replacement on Sat Nov 04, 2017 10:26 am

yamaguzzi

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@Born Again Eccentric wrote:
@yamaguzzi wrote:....The ride is harsh.I feel every bump in the road especially on concrete road .The rear shock looks to be stock and I adjusted it to the softest setting but it still sucks.I also think I might like to replace the fork springs ,at least change out the fork oil to something lighter.This bike hops over cracks in the road and if I hit a hole it's downright scary . I am thinking Progressive 412 .Anyone try these? Any recommendations of fork oil weight and amounts? In other news,I ordered the new shoes today .I went with the Avons and will be fitting them early next week when they arrive.
I switched to RAM shocks on both my bikes and that made big difference - when one of my old original shocks was at the end of its life, the ride comfort became very harsh - of course, I didn't notice at first, because the degradation crept up on me and I just cursed the bumpy roads. Every bump, ripple and drain cover felt like I was bottoming out and the cornering capability left a lot to be desired. Due to the cost of a new shock, I was in denial for some time - blaming the road quality and not enjoying the ride, but eventually took a crowbar to my wallet and bought a RAM shock - holy cow, what a difference! Goes to show that you don't realise how bad something has become until you replace it.

I also have played with the fork oil to see if that softens the ride - standard grade is 10W. Add a little less than the recommended amount and the ride is a little softer (less oil means more air in fork to compress and a spongier ride). When draining the oil, you need to ensure that it is all gone before adding the measured amount...otherwise you can, in effect, over fill the fork which, of course leads to a harder ride (more oil, less air, hard ride) which is not at all comfortable. When I experienced a hard ride, I tried blending 10W fork oil with 5W oil to give a less viscous 7.5W mix. This seemed to improve things and soften the ride again, but since then I have reverted back to 10W oil and to be honest, I didn't really notice any difference. I reckon that the hard ride I experienced before was probably down to overfilling (adding measured amount of new oil on top of a little residual oil left in the forks after draining) and was down to my inexperience rather than the oil viscosity.

I have no experience of progressive springs up front or the YSS rear shock though.
Now this is just what I was looking for. I know from working on my other bikes that the amount of oil is actually more important to the ride than the weight but they are mostly Japanese bikes from the 60's and 70's.My Moto Guzzi has a unit that us MG guys refer to as screen door closers in the forks and just uses a little bit of ATF to act as lubrication and the springs and those screen door closers do all the dampening . So now it's time to look into which of these shocks won't break the bank to have shipped to New York from Europe. I'll be changing the fork oil next week when I am mounting the new tires .Thanks for all the information guys. With any luck I'll have this bike all dialed in by late winter and she will be traveling next summer packed like my Moto Guzzi heading someplace out in the world that I have yet to see .


__________________________________________________
1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://facebkfugitive.blogspot.com/
    

9Back to top Go down    progressive 412 on Sat Nov 04, 2017 2:01 pm

nvboy

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I bought a Progressive 412 shock a month or so ago. My story is almost identical to Born Again Eccentric; original shock slowly degrading to the point that riding wasn't fun any more. I had planned on a 2500 km five day trip so decided to pull the trigger and replace the shock. As the ride date was approaching fast I realized that delivery times would be important. I decided on a Progressive 412 as it would arrive in time for the ride and the cost including delivery was reasonable. Unfortunately the shock arrived at my house four hours after I left on the ride so I did 2500 kms on essentially no rear shock.

I installed the shock after I returned but have only put a couple of hundred kms on it since. As mentioned by others, going from terrible to anything better is wonderful. I am not into dragging my pegs/knees/elbows and most of the roads I ride on are usually well maintained. Having never ridden a K with a high end shock I have very little to compare it to but the 412 suits me just fine, especially for the price.

nvboy


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10Back to top Go down    Re: Rear shock replacement on Sat Nov 04, 2017 3:20 pm

yamaguzzi

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Thanks for the input.I'm a traveler and like you not into pushing it to the limits in the curves. I like a nice comfy ride that I can get aggressive with when I feel like it. What I really need is something that can handle the weight of camping gear , tools,and all the other crap needed to live off the bike in a tent for extended periods of time but at the same time give me a good ride unloaded when I just want to have fun.


__________________________________________________
1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://facebkfugitive.blogspot.com/
    

11Back to top Go down    Re: Rear shock replacement on Sat Nov 04, 2017 5:00 pm

MartinW

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Sounds like you want a Nivomat OEM shock by Boge. Automatically adjusts according to load, self levelling and provides consistent ride height. And allsorts of other magical suspension related magic. I've always wanted to try one but I have never ever seen one for sale in OZ. Rarer than Yowie poo, but some one in the US might have one and give you a review.
Regards Martin.

    

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