NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 19, 2011 04:22 AM
Rear shock fix after stretching
Hey guys, on bumpy surfaces my bike is loud from bottoming the shock out and my ride on some surfaces is now bouncing all over. What do you suggest? Someone on another board told me to get a 2008 Busa rear spring for it and that will fix it...true?
Any suggestions is appreciated, thanks. 
  
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smokinZX14
Needs a life
Posts: 10197
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posted September 19, 2011 05:38 AM
Nick set your rear shock preload ... Turn both adjusters all the way in ( clockwise ) till seated , then back them off ( counter clockwise ) a 1/4 of a turn ... That should help .. If it makes it better but doesn't fully fix the problem you may need to have the shock revalved for your weight ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 19, 2011 06:06 AM
 Edited By: NinjaNick on 19 Sep 2011 14:07
Ok, thanks smokin. I'm lowered one hole too which messes it up as well, huh?
I definitely will take your advice and get that done to my shock then.
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 19, 2011 06:56 AM
Edited By: gilberjj on 19 Sep 2011 16:11
Putting on a stiffer spring is only a bandaid (and a bad one at that). The stiffer spring will easily blow through the weak valving of the stock shock. Call TRAC DYNAMICS and get a revalved shock. They are inexpensive and work very well. I think I got a hayabusa spring (gen I, the gen II is too stiff imo) and drag racing revalve for around $175 shipped. Plus I still have the stock spring I can sell.
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 19, 2011 08:02 AM
Sweet, good looking out on where to buy gilberjj!
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 19, 2011 08:11 AM
WHOOPS!!!!!! I put Race Tech (but they are spendy), I don't know what I was thinking. I meant to say TRAC DYNAMICS.
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 19, 2011 08:12 AM
Went to racetech. I've noticed our stock rear is 9.7kg...I would get the 11kg.
A busa is 14.xxkg stock! It recommends a 17.xxkg for myself. Why do they recommend a 11kg for me on 14 and a 17kg on busa? Any idea man?
If I bought the Busa spring with the revalving, does that spring fit on our bikes just the same as the 14 spring?
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted September 19, 2011 02:37 PM
Here's the thing.... I weigh 250 unsuited, and my bikes at about 66" right now (10ish" over) and I opted to go for the gen I spring because it's a little softer than the gen II spring. My local tracks won't prep like mirock, so I chose the softer of the 2 springs. The spring rate feels pretty good right now, but it doesn't hook up for shit on the street with 260+whp! 3rd gear hooks when the tires hot after spinning it, but if I'm just out on the freeway, it won't really hook till mid 3rd or 4th.... Sure is fun though!
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted September 19, 2011 03:09 PM
Does anyone ever adgjust the spring compression by turning the shock collar clockwise ?
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*****DragRacers do it better, because they dont cut Corners*****
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1badzx12r
Needs a life
Posts: 8321
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posted September 19, 2011 03:29 PM
quote:
Does anyone ever adgjust the spring compression by turning the shock collar clockwise ?
i do..when your 300lbs suited you adjust everything
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BLK ICE
Pro
we'll leave the light on for u
Posts: 1709
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posted September 19, 2011 03:49 PM
quote:
quote:
Does anyone ever adgjust the spring compression by turning the shock collar clockwise ?
i do..when your 300lbs suited you adjust everything
Yep. @ 300lbs everything is custom.
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kawasakijockey
Pro
Posts: 1876
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posted September 19, 2011 04:44 PM
quote:
Went to racetech. I've noticed our stock rear is 9.7kg...I would get the 11kg.
A busa is 14.xxkg stock! It recommends a 17.xxkg for myself. Why do they recommend a 11kg for me on 14 and a 17kg on busa? Any idea man?
If I bought the Busa spring with the revalving, does that spring fit on our bikes just the same as the 14 spring?
The busa has different leverage against the shock. Something like prying with a long bar rather than a short.
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Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 20, 2011 05:49 AM
Edited By: NinjaNick on 20 Sep 2011 13:49
quote:
Does anyone ever adgjust the spring compression by turning the shock collar clockwise ?
I did that when it was stock length and not lowered since I'm not a lightweight guy. I'll have to see if I have more room to keep turning it.
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 20, 2011 05:51 AM
Edited By: NinjaNick on 20 Sep 2011 13:51
quote:
Here's the thing.... I weigh 250 unsuited, and my bikes at about 66" right now (10ish" over) and I opted to go for the gen I spring because it's a little softer than the gen II spring. My local tracks won't prep like mirock, so I chose the softer of the 2 springs. The spring rate feels pretty good right now, but it doesn't hook up for shit on the street with 260+whp! 3rd gear hooks when the tires hot after spinning it, but if I'm just out on the freeway, it won't really hook till mid 3rd or 4th.... Sure is fun though!
You saying softer hooks bad, and stiff hooks the tire good? I'm new to the drag set-up scene. For some reason I would've thought it would be opposite.
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted September 20, 2011 08:54 AM
Your right Nick, on the soft side is what you want...For an OEM shock...If too soft then the tire hits the inner fender so you have to adjust the spring rate until it doesnt hit anymore...For the heavier guys you need the tiger tail...
The revalved shocks are different while using a stiffer spring...When you sit on a bike with a revalve, shorter shock the spring is a little stiffer but hooks due to the way the revalve was done...dont confuse the two different set ups...
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*****DragRacers do it better, because they dont cut Corners*****
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smokinZX14
Needs a life
Posts: 10197
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posted September 20, 2011 09:55 AM
Nick stop over thinking this ... Run the bike with the stock shock set the way i told you before you touch anything .. I know a few guys at about 180 pounds that go low 1.30s 60s with the stock shock set up .. If you still have a problem THEN think about a revalved shock ..
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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Newf14
Zone Head
2007 ZX1400
Posts: 563
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posted September 20, 2011 10:23 AM
I was running with a stock shock rebound and compression turned stiff. I tryed to tightened down the spring two turns and the bike would hop out of the hole, I am 205 unsuited, thinkin of a revalved shock this winter season,goin with a BMC RACING TECHNOLOGY revalve.
Newf14
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Bently
Needs a life
2012 14r In Blue and no Mods!
Posts: 5428
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posted September 20, 2011 10:24 AM
They are pricey but the Brocks ohlins that I have on my bike rocks, I can sit stright up like Im on the street and pull 1.36 60fts all day in bracket race mode. last time out out of 6 passes 5 were 1.36's and one 1.358. wont ever go back to stock!
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted September 21, 2011 03:30 AM
Thanks all. I have emailed myself the link to this thread so I don't lose any advice. It's all appreciated.
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68gts2
Zone Head
hobbies ( Beating you !!! )
Posts: 927
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posted September 21, 2011 10:58 AM
Nick I am 240lbs in full gear on swb.sent my shock to Traxxion Dynamics for a rebuild valving and a 800lb spring. Best mod ever on the 14.
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eklipse636
Needs a life
ZX-14
Posts: 6046
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posted September 22, 2011 01:44 AM
I wouldn't mess with Lonnie at bmc. I would send my shock to Adams and let them do it. Lonnie at BMC did mine, it's ok, he did not send me what he says he was, did not do it the way we talked about it, the spring was loose... I just wasn't satisfied. He told me if I shipped it back to him he would correct everything. If he didn't do it right the first time, do I need to ship it from GA to Cali again??
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68gts2
Zone Head
hobbies ( Beating you !!! )
Posts: 927
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posted September 22, 2011 09:44 AM
That's one of ther reasons I chose Traxxion Dynamics was they are in Woodstock Georgia which is 1 day shipping on ground.
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Chromed-out,in the dirt 08SE with all the good stuff!!!
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted September 22, 2011 12:21 PM
Im not saying that Penske, Ohlins or any of the revalve shocks with springs are not good, as a matter of fact they make a big difference in the suspension performance on any bike!!!
All im sayin is learn how to adjust the OEM suspension before just spending all that $$ on the Hi-Tech suspension goodies and STILL not know how to dial it all in by YOURSELF !!!
For a guy that weighs 150 all he has to do is adjust the rebound & compression...
For the 180 and heavier then your suppose to adjust the spring compression...I recommend 2 full turns clockwise...THEN adjust the rebound & compression to PRESERVE the shock by having the SPRING do most of the work...Ask those that rebuild shocks, thats what they will tell you...
The OEM shocks are not soo bad, you just have to adjust the rear spring compression then go for a ride on the street ot drag strip to see how it feels or if it hits the under tail, then adjust the rebound and compression...Yes, its very time consumming!!!...Then you move onto the front and again start with the spring compression then rebound and compression...You will see it most cases you will just have to turn the fork compression spring a half turn clockwise at a time to make a difference...
Just ask Smokin how fast he went on an OEM shock !!!
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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NinjaNick
Needs a job
'08 ZX14 (Blue)
Posts: 4558
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posted February 25, 2012 07:16 PM
Is it hard to re-valve the rear shock myself?
I was considering purchasing the gold valves from racetech and do it myself if it's do-able. 
http://racetech.com/ProductSearch/2/Kawasaki/ZX-14/2006-11
Opinions?
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