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  #1  
Old 04-02-2008, 11:24 PM
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K12RS "upgraded oem shock"

Does anyone know if the upgraded rear shock (yellow springs) on the K12RS is rebuildable? It is a Showa unit. I know about Bruno's up in Ontario. Also, my bike has about 65k on the original shocks. I know, I know, don't have a coronary. It's almost exclusively highway commuting and she really still feels great. So besides blowing a seal and leaking oil, how do you know if it's shot??
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  #2  
Old 04-03-2008, 08:52 AM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by beemer1
Does anyone know if the upgraded rear shock (yellow springs) on the K12RS is rebuildable? It is a Showa unit.
You should be able to talk your dealer into selling a new one for 400 and some change.

Quote:
... So besides blowing a seal and leaking oil, how do you know if it's shot??
Go into a turn fast. Does the bike feel like it has a hinge where the frame should be?

Trivia:
White spring is the stock RS shock.
Yellow spring is the RS "Sport" shock that BMW never marketed, so they put them on the GT.
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  #3  
Old 04-03-2008, 04:39 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by beemer1
Does anyone know if the upgraded rear shock (yellow springs) on the K12RS is rebuildable? It is a Showa unit.
Yes, but by the the the shop finishes the work required (converting it to a "rebuildable" unit) you'll have spent a little bit more than the price for a new OEM replacement. Really, not reccommended.
Quote:
Originally Posted by beemer1
I know about Bruno's up in Ontario. Also, my bike has about 65k on the original shocks. I know, I know, don't have a coronary. It's almost exclusively highway commuting and she really still feels great. So besides blowing a seal and leaking oil, how do you know if it's shot??
Anecdotal knowledge. They wear out ~30k miles, but don't necessarily fail. Basically, the oil starts to break down and air bubbles take longer and longer to dissapate.

Depends on how long you plan on keeping the bike. A rebuildable shock like Ohlins or Wilbers might have a higher intial cost, but you break even or get a bit ahead after one rebuild. Plus, you get a better ride overall.

The "hinge" effect would primarily come from the preload, some of which you can suppress by adding more preload via the adjustment on the left side of the bike. But, if you're over 250lbs/115 kilos, you're ready for a bigger spring anyway.
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  #4  
Old 04-03-2008, 04:47 PM
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Re: K12RS "upgraded oem shock"

if youve blow a seal
no doubt its time for a rebuild

that will cost close to a new oem shock
certainly less than a ohlins

ive had the white & yellow spring shock

thought the white spring was better

i have yellow now with only 18k
bad under 80-90mph
great at speeds over that

not as adjustable as i would like

will convert to ohlins soon




good luck
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  #5  
Old 04-03-2008, 05:34 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by cabnfvr
You should be able to talk your dealer into selling a new one for 400 and some change.


Tim, it apears BMW has jacked the list price of the Sport shock up to $750
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  #6  
Old 04-03-2008, 07:10 PM
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Re: K12RS "upgraded oem shock"

Thanks to those who replied, and for not saying "what! you mean you haven't spent the required gillion dollars on an Ohlins unit????" I do understand the performance gained in the upgrade but that's alot of scratch! I may pursue the rebuild. I don't think the shock requires a conversion to rebuild, I think it IS rebuildable. They may even be able to upgrade the internals. We'll see and I'll keep you posted. BTW, does the cost (1-1.5k dollars) of an Ohlins or Wilbers include front and rear?
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  #7  
Old 04-03-2008, 07:19 PM
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Re: K12RS "upgraded oem shock"

Try looking on ebay for shocks. You can often find relatively new OEM shocks for cheap. Rarely you can find good used Ohlins for about 1/2 price.
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  #8  
Old 04-12-2008, 11:54 AM
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Re: K12RS "upgraded oem shock"

this isse of the BMW MOA magazine......

there is a fellow that has a set ...........

with only 50 miles........

at a reasonable price

worth checking out
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  #9  
Old 04-12-2008, 11:19 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by cabnfvr
Trivia:
White spring is the stock RS shock.
Yellow spring is the RS "Sport" shock that BMW never marketed, so they put them on the GT.

Hhhmmmmm, this seems backwards. My GT has a white spring, and I've never *seen* a GT with a yellow spring. Before he used it as a deer hammer, my buddie's '03 KRS had a yellow-spring shock that was listed as the Sport, or upgrade shock...

Unless, of course, I've been breathing too much gas fuamge out in the garage.

Best,

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  #10  
Old 04-12-2008, 11:59 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by GTRider
Hhhmmmmm, this seems backwards. My GT has a white spring, and I've never *seen* a GT with a yellow spring. Before he used it as a deer hammer, my buddie's '03 KRS had a yellow-spring shock that was listed as the Sport, or upgrade shock...

Unless, of course, I've been breathing too much gas fuamge out in the garage.

Best,

GTRider

I was about to post the same thing.

The WHITE shock is the stock RS AND GT shock.

The YELLOW shock was offered as a Factory installed OPTION on the KRS (called the SPORT SHOCK and was only $70 on my 2004) but wasn't even listed as an option on the KGT (at least on the '04 price sheet).

As a side note, the ONLY color KRS I ever saw the YELLOW shock on from the factory was the Zebra. I am not sure why.....maybe the factory thought it was the only sport model?? MOST of the '04 Zebras came with the SPORT SHOCK on them (according to several dealers and my personal observation).
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  #11  
Old 04-13-2008, 05:54 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by Htheater
I was about to post the same thing.

The WHITE shock is the stock RS AND GT shock.

The YELLOW shock was offered as a Factory installed OPTION on the KRS (called the SPORT SHOCK and was only $70 on my 2004) but wasn't even listed as an option on the KGT (at least on the '04 price sheet).

As a side note, the ONLY color KRS I ever saw the YELLOW shock on from the factory was the Zebra. I am not sure why.....maybe the factory thought it was the only sport model?? MOST of the '04 Zebras came with the SPORT SHOCK on them (according to several dealers and my personal observation).


thats not true

ive had 2 2004 zebra.... brand new yet
combined mileage easily 40k

1 with white shocks

second with yellow"sport"

by far the white were better & more adjustable..... those in europe would have
valid reasons to disagree

the white shocks were adequate below 80-90 mph & solo
seriously inadequate double or at speed over 80-90 mph

the yellow over sprung & over damped under 80-90 mph adequate over that speed
& solo
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  #12  
Old 04-13-2008, 09:45 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by Red Tail
thats not true


WHAT is not true? I do not believe anything I posted and you quoted is not true. I only made statements of fact and then added some observations at the end.

YOU may like the stock white shock better, but it is still the stock shock. The yellow shock was sold as the sport shock and IS a stiffer setup. I won't argue with your opinion as that is what it is and an opinion on a shock and the resulting ride is a very personal thing....not only due to differences in weight of the rider, but riding styles.

Quote:
Originally Posted by Red Tail
those in europe would have
valid reasons to disagree

I will probably regret this, but what did you mean by this?
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Old 04-13-2008, 09:58 PM
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Re: K12RS "upgraded oem shock"

Personally, I love the ride quality of my 'sport shock' and it may be part of the reason they have lasted so long (?) BTW, my bike is a zebra.
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Old 04-13-2008, 10:42 PM
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Re: K12RS "upgraded oem shock"

Just as an added data point, the KRS I referenced in my earlier post was a zebra and had the yellow-spring shock.

GTRider
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  #15  
Old 04-14-2008, 11:59 AM
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Thumbs up Re: K12RS "upgraded oem shock"

I have a 04 K12rs Zebra with the yellow sport shock and it does the job so far 23,000 miles on it
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  #16  
Old 04-14-2008, 12:23 PM
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Re: K12RS "upgraded oem shock"

Don't know for certain (but I read it on the internet?), but I believe the yellow spring was a progressive-rate spring, while the white spring was the standard-rate spring. If you had them side-by-side, it'd be easy to see.
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Old 04-14-2008, 12:53 PM
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Re: K12RS "upgraded oem shock"

that the only RS the only bike the yellow shock came on .......

yet everyone knows that the Zebra was the fastest RS............

gained at least 15 hp & 20mph jyust sittin still !!
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Old 04-14-2008, 12:58 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by Red Tail
that the only RS the only bike the yellow shock came on .......

yet everyone knows that the Zebra was the fastest RS............

gained at least 15 hp & 20mph jyust sittin still !!


Another case of not reading my post thoroughly....I clearly stated that it was the only color that I have ever seen it on.....it was a side note/observation, not a statement of fact!!

BTW, neither of the two Atlanta dealers have seen it come on any other color from the factory as I asked them (at least the salesmen I talked to). Also, ALL of the ones in this thread have been Zebras. That STILL doesn't mean they didn't....just that THEY KNEW which is the fastest color and, at least put them on plenty of them!!!!

BTW, have YOU seen it on other color KRS bikes from the factory?
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Old 04-14-2008, 02:04 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by Htheater
Another case of not reading my post thoroughly....I clearly stated that it was the only color that I have ever seen it on.....it was a side note/observation, not a statement of fact!!

BTW, neither of the two Atlanta dealers have seen it come on any other color from the factory as I asked them (at least the salesmen I talked to). Also, ALL of the ones in this thread have been Zebras. That STILL doesn't mean they didn't....just that THEY KNEW which is the fastest color and, at least put them on plenty of them!!!!

BTW, have YOU seen it on other color KRS bikes from the factory?

My wife purchased a new '04 Piedmont Red KRS in June '05 (last one at the dealer) it came with the yellow spring "sport" shock from the factory, listed as an added option on the price tag. She put 37K on the bike and I inherited it last September. Since then I have put another 10K on it. I can't really tell if those stock shocks are worn out. I can't imagine she wore them out weighing in at about 115. I'm a beastly 185 with gear. Bike handles great, but sometimes like this past weekend, I hit a pot hole while overtaking a car during hard acceleration and it felt like the spring totally compress. Regardless, my goal is to get a set of new Ohlins soon.

So there you go guys - Piedmont Red KRS with a sport shock from the factory. And by the way the Red bike is much better looking and faster than that Zebra.

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Old 04-14-2008, 04:11 PM
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Re: K12RS "upgraded oem shock"

Quote:
Originally Posted by FlagRS
So there you go guys - Piedmont Red KRS with a sport shock from the factory. And by the way the Red bike is much better looking and faster than that Zebra.

FlagRS

That kills my observation and deduction that they only put them on the faster Zebra versions!
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  #21  
Old 10-09-2018, 03:18 PM
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Re: K12RS "upgraded oem shock"

Has anyone found the answer to the difference of the Yellow/White Sport Springs since this post from 2008?

I currently have two previously owned 2002 RS's that both have the Sport Package Option and one has a Yellow Spring and the other has a White Rear Spring. My BMW dealer cannot explain why or what the difference is between them.
The "yellow" RS with 32,000 miles has been retired as a project/parts bike and the "white" RS has only 5,000 mile on her and I have not ridden both back to back but the "yellow" RS seemed to handle better during spirited and/or two up riding.

My question is, with 32K on the yellow shock & springs and only 5K on the white shock/springs should I bother to swap the yellow spring on to the white stock sport shocks? The yellow springs do not appear to be progressive springs (visually) nor do they have any brand markings stamped on them. Do springs age/wear out like shocks do?

Any input on this topic would be appreciated. Thanks.

P.S. I just purchased a '04 GT w/5K on it which also has the White Springs

HadiRSGT
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Old 10-09-2018, 03:38 PM
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Talking Re: K12RS "upgraded oem shock"

I have the white shock on the 2001 Mandarin - Graphite rs and the yellow shock is on the 2004 Blue & White rs. ( Zebra )
My bikes came from the factory this way.
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