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Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > Tires, Brakes, Suspension & Steering > Gen 1 Tires, Brakes, Suspension & Steering

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Old 06-09-2013, 01:46 AM   #201
aeronaut
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I bought an assortment from 2 places, and I'm not 100% sure which ones I used where. But...I do know that for the upper, I used bronze bushings from asbbearings.com, part number ZMB 1012-08. (Which is 10 ID, 12 ID, 8mm long), they're $4.20 ea.

For the lower, I used 2 15mm long bushings (steel backed PTFE). I bought some of these from both mcmaster carr and asbbearings. One them was a few thousanths longer than the other, and the shorter ones JUST fit. A piece of sandpaper would have made the longer ones fit. But anyway, part number from asbbearings.com is
ZU MB1015ZU, $0.98 ea.

Knowing what I know now, I would have gone with steel back PTFE in the uppers also, simply because they're so cheap (from asbbearings):
ZU MB1008ZU, $0.45 ea.

I hope I got all the above right! Because I ordered 2 types of bushings from 2 different places, and just pulled from that supply, I'm only 90% sure.
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Old 06-09-2013, 06:47 AM   #202
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Quote:
Originally Posted by BrianG View Post
............

And yes, a stock Gen1 FZ1 is said to be prone to headshake, especially if heavily loaded. A too-soft rear spring would exaggerate that tendency.
that is especially true when they've been modified witha full exhaust, proper jetting, advancer & airbox mod and WFO is applied in any of the bottom 5 gears @ high rpms

Don't ask how I know...
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Old 06-12-2013, 07:24 AM   #203
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many thanks for the info on the bushings This is my next project. i have just had a cycle lift delivered. My knees need some TLC.
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Old 09-07-2013, 12:56 PM   #204
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Hello everyone,
after reading this post I found a cheap BMW shock on ebay, however my weight is 285 lbs. I was wondering would I be able to get away with the yellow CBR Spring (I can find easily on ebay, not so with the hayabusa spring)? Also is there a link or some online info on how to change the spring for BMW shock?
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Old 09-18-2013, 04:13 PM   #205
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Hey citystar I've been away from the forum for a while. I think the Yellow CBR spring will work well for you. the spring is removed from both the CBR and BMW shocks by compressing the spring and sliding the C shaped pring perch out from under the spring. Then carefully releasing the pressure on the spring. Assembly is the reverse procedure.
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Old 09-19-2013, 07:20 AM   #206
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Originally Posted by citystar777 View Post
Hello everyone,
after reading this post I found a cheap BMW shock on ebay, however my weight is 285 lbs. I was wondering would I be able to get away with the yellow CBR Spring (I can find easily on ebay, not so with the hayabusa spring)? Also is there a link or some online info on how to change the spring for BMW shock?
My only concern about a much stiffer spring on the BMW shock is a possible lack of rebound. I run the 1000rr shock with the stock spring rate (475lb/in) and longer dogbones for normal ride height and have noticed that the first 4-5 clicks on the rebound are worthless. I run 6-7 depending on if I'm just cruising or riding more aggressively. It does appear that 8-10 on rebound gets lots of damping quickly, ie it really gets aggressive quickly. You may be able to get enough rebound with an approx. 600lb/in spring but my experience shows you'll be running close to the full stiff rebound on the shock.
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Old 09-19-2013, 12:10 PM   #207
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Originally Posted by stretch160 View Post
Hey citystar I've been away from the forum for a while. I think the Yellow CBR spring will work well for you. the spring is removed from both the CBR and BMW shocks by compressing the spring and sliding the C shaped pring perch out from under the spring. Then carefully releasing the pressure on the spring. Assembly is the reverse procedure.
Stretch,
I haven't read the whole thread, but can you tell me the Center to Center length on the BMW shock? My application is not an FZ1, but a FJ 1200. I have put a K 1200 RS shock on it, but it is too long & the spring rate too low.

Joe

Last edited by FJ Fun; 09-19-2013 at 06:20 PM.
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Old 09-19-2013, 01:21 PM   #208
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Originally Posted by citystar777 View Post
Also is there a link or some online info on how to change the spring for BMW shock?
Hey citystar, try googling "ghetto spring compressor".

I used straps and a board. But the smarter way to change springs is to take the shock to a bike shop.
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Old 09-28-2013, 05:13 PM   #209
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Originally Posted by FJ Fun View Post
Stretch,
I haven't read the whole thread, but can you tell me the Center to Center length on the BMW shock? My application is not an FZ1, but a FJ 1200. I have put a K 1200 RS shock on it, but it is too long & the spring rate too low.

Joe
1000RR shock thru 2012 is 314mm += or- a couple mm, hard to measure exact with the spring on. Supposedly 2013 RR shock is 4mm shorter. And stock RR spring is 475 lb/in.
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Old 10-09-2013, 08:49 AM   #210
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Thanks you Stretch and Captain, I see a lot of of great ways under "Ghetto Spring Compressor" (some not so safe) but I will let you guys know how it comes out
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Old 10-09-2013, 04:13 PM   #211
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Originally Posted by Bruce in Tucson View Post
1000RR shock thru 2012 is 314mm += or- a couple mm, hard to measure exact with the spring on. Supposedly 2013 RR shock is 4mm shorter. And stock RR spring is 475 lb/in.
Bruce in Tucson
'03 Bumblebee, etc.
Bruce,
Thanks for checking on those dimensions and specs for me. Greatly appreciate it.

Joe
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Old 12-01-2013, 05:06 PM   #212
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Which adjuster does the hi and low speed compression damping? Do you simply put a socket on the knob and turn it to adjust the black adjuster? I take it that the rebound is on the bottom and higher numbers are more damping?
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Old 04-09-2014, 05:07 AM   #213
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Hello all I tried the S1krr shock mod last year, but was ripped off and sent a bad shock. But yesterday I picked up a 2008 r6 shock in great shape. I already had the new dog bones machined for the s1krr setup, they are 145mm center to center. I see the suggested length for the r6 mod is 130mm. Are these lengths different to compensate for the overall shock lengths?
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Old 04-09-2014, 06:09 AM   #214
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Originally Posted by fazernoob66 View Post
I already had the new dog bones machined for the s1krr setup, they are 145mm center to center. I see the suggested length for the r6 mod is 130mm. Are these lengths different to compensate for the overall shock lengths?
Yes. With 145mm you'll have a low rider. Keep the long dog bones for trips to the drag strip.
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Old 04-09-2014, 08:23 AM   #215
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Yes. With 145mm you'll have a low rider. Keep the long dog bones for trips to the drag strip.

Awesome thanks. I read a bit deeper, I am going to make 127mm bones and raise the tail a bit. There is a r1 front end local on craigslust, I may jump on that soon and do the whole bike over.
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Old 04-09-2014, 05:23 PM   #216
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The R1 conversion is a great upgrade. I did mine last year and have a BMW shock on the rear. Completely transforms the bike.

Let me know if you have any questions about the mod. I have some lessons learned, the hard way.
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Old 04-23-2014, 06:51 AM   #217
fazernoob66
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Picked up a super nice condition 08 shock, machined some bones and installed that sucker! I made the bones to 127mm between centers and the free suspension is 1/2" higher than stock. The handling improvement is incredible! Now the front end feels like my xrL, I have to get a USD front end this year.
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Old 05-20-2014, 12:12 PM   #218
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Anyone have a CBR1000RR yellow spring they did not use and want to sell? I will purchase a full shock if needed, but figured if someone bought one and did not use it I would help them move it.
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Old 06-18-2014, 12:34 PM   #219
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Did this mod on my spare Gen1 about a month ago. Pristine 2012 S1000rr shock off the bay, but utilized a 700 lb. Eibach spring I had from a stock shock upgrade/re valve by Curtis a dozen years ago.

Bought some of those $30 Asian spring compressors. They did the job but struggled with both springs, of course more so with the 700 lb spring.

I'm sure the sag isn't right. I rotated the threaded spring pre-load collar as far out as it would go. Put all the other settings on 7. I weigh about 230.

Stock dog bones, bike sits a tad higher, but not much.

I know folks will say the spring is too heavy without re-valving but I have to say it performs almost as nice as the Penske/650lb. I have on my main Gen 1.

So in summary, I'm too lazy to set things up right but very happy with the results I got. I guess the question is will the heavy spring prematurely blow out the other components. We'll see, I got less the $75 into so not too worried.
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Old 06-27-2014, 06:52 PM   #220
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I've posted this in another thread, but I installed a 2013 S1000RR shock on my bike with the yamaha linkage and BMW spring (which is stiffer than the Yamaha spring).

The rear of the bike is raised about 12mm. I assume it has the stock S1000RR spring, but not certain--it's pretty common for people to switch to stiffer springs, and of course the shock was second-hand.

At least it works fine--I've bought a second-hand shock before that leaked from the minute I first installed it, and continued to do so after having it rebuilt--twice.

Ride is a bit better than stock, but still way too harsh. I could go to a softer spring like the 475 pounds/inch recommended for my weight by penske--that's the stock FZ1 spring rate, right? But with the shorter travel of the BMW shock, I'm afraid that might not work.

I wonder if I'll need a custom linkage to get a suitable solution. I'm not a machinist, so it's not something I can fab myself, and I doubt anything more complicated than modifying an existing linkage would be worth having a pro do.

I'm thinking of switching to an R6 kit, or maybe even an aftermarket shock.

But before I do that, do y'all have any suggestions?
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