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Author Topic: rear spring  (Read 9475 times)

Offline DougChan

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rear spring
« on: August 24, 2015, 03:25:38 PM »
 I have a 1st gen. Busa and am going to drag race it.It has a bolt on swing arm extension. I weigh 280 with all gear on.The stock spring is way too soft.Race Tech is close to my home ,but mostly do dirt bikes.The shock will have to be redone also. Any input will be appreciated.
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Offline Ghost-Geezer

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Re: rear spring
« Reply #1 on: August 24, 2015, 05:39:24 PM »
Brock's sells a good drag-shock with a remote reservoir for both rebound and compression dampening.  I am having it installed as we speak on a Mac arm at 4" over.  Stocker won't get it done for you, it appears.  Spring is too weak. 
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Offline piratediverjefff

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Re: rear spring
« Reply #2 on: August 24, 2015, 07:19:01 PM »
Doug,

I know there are several places around but can't think of them at the moment(someone should chime in within the next day or two),though you might give these guys a call.

Jeff

http://www.traxxion.com/index.cfm
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Offline Ghost-Geezer

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Re: rear spring
« Reply #3 on: August 25, 2015, 07:15:53 AM »
Traxxion Dynamics did my front end years ago for my little ZX9 and their work was very good, IMO.
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Offline DougChan

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Re: rear spring
« Reply #4 on: August 25, 2015, 06:46:30 PM »
I took it to race tech in Corona. They did several shocks and springs for me for dirt bikes back when I was racing,,or trying too! I filled out a sheet with details,,age,weight,swingarm length. Just about all the suspension business people have the formula for spring rates.Will be testing at Irwindale 8th mile soon.
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Offline piratediverjefff

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Re: rear spring
« Reply #5 on: August 25, 2015, 07:08:38 PM »
 I would think they could get it sorted out.:thumb:
« Last Edit: August 25, 2015, 07:17:06 PM by piratediverjefff »
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Offline BATTMAN

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Re: rear spring
« Reply #6 on: September 21, 2015, 08:08:39 PM »
Quote from: DougChan on August 25, 2015, 06:46:30 PM
I took it to race tech in Corona. They did several shocks and springs for me for dirt bikes back when I was racing,,or trying too! I filled out a sheet with details,,age,weight,swingarm length. Just about all the suspension business people have the formula for spring rates.Will be testing at Irwindale 8th mile soon.

why did they need your age.....lol
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Offline dnhabusa

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Re: rear spring
« Reply #7 on: September 23, 2015, 03:51:30 AM »
Quote from: BATTMAN on September 21, 2015, 08:08:39 PM
why did they need your age.....lol

No kidding, a 280-suited rider who's 30 will make the bike sag just as much as a 280-suited rider who's 55.
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Offline Ghost-Geezer

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Re: rear spring
« Reply #8 on: September 23, 2015, 11:45:32 AM »
Quote from: dnhabusa on September 23, 2015, 03:51:30 AM
Quote from: BATTMAN on September 21, 2015, 08:08:39 PM
why did they need your age.....lol

No kidding, a 280-suited rider who's 30 will make the bike sag just as much as a 280-suited rider who's 55.

But the 30 year old will have more weight in the upper body while the 55 year old will have it all in his tummy.  :hys:
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"The thrill of Boost cannot be duplicated on earth."

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"Step UP or Step Aside"

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Offline WAR MACHINE 1300

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Re: rear spring
« Reply #9 on: September 24, 2015, 07:43:39 PM »
My guess is they are keeping track of the ages of their customers.
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Offline DougChan

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Re: rear spring
« Reply #10 on: October 02, 2015, 10:11:15 PM »
I tested at Irwindale 8th mile. Made 4 passes,with a best of 7.31 e.t. at 105. Lots of tire spin off the line. I will do some more shock adjustments and am looking for a stock 1st gen. rear rim.I want to run a drag radial. Any one in so.cal. have one?...as far as age on the tech sheet at race tech,i have the slightest idea!..At the track I was teasing some young guys that 60's the new 30...one of them told the announcer,so over the loud speaker he blurted out that the rider says 60's the new 30...he said he didn't know if I was talking about eyesight or the bike! Dam kids...Again I need a 1st gen. rear wheel.
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Offline piratediverjefff

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Re: rear spring
« Reply #11 on: October 03, 2015, 02:37:12 PM »
Havin' a big bike race at Fontana next weekend Doug(Oct. 10/11),they had one back in July and it was a hoot.Check out the next to the last post by Red on the link I've posted for the info.

Jeff

(could probably hook up with somebody there/locally for a Gen I rear wheel)

http://westcoastsportbikes.org/index.php?topic=603.msg7144#new
« Last Edit: October 03, 2015, 02:39:25 PM by piratediverjefff »
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Offline DougChan

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Re: rear spring
« Reply #12 on: October 04, 2015, 12:27:58 PM »
yes Big Race at Fontana. N.M.C.A..There will be bikes there to. I got a rim and shinko from Adam..This should get me into the 6's at irwindale now.
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Offline Ghost-Geezer

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Re: rear spring
« Reply #13 on: October 04, 2015, 01:06:57 PM »
I'm pullin' for ya, pal.  Just cut that 60 ft. time down a tad.   
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"The thrill of Boost cannot be duplicated on earth."

"One drink is too many and a thousand is not enuf."

"Step UP or Step Aside"

"Four wheels moves the body,
Two wheels moves the soul."

Offline piratediverjefff

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Re: rear spring
« Reply #14 on: October 04, 2015, 08:09:11 PM »
 :tu:
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Offline DougChan

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Re: rear spring
« Reply #15 on: October 19, 2015, 11:27:49 PM »
I am improving everytime I go to irwindale. With the shinko I'm down to 7.19  108mph..60ft 1.8. I need more seat time as am not leaving hard enough. Testing again thurs.
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Offline Jeremyg1283

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Re: rear spring
« Reply #16 on: January 24, 2016, 02:14:16 PM »
i need my rear shock revalved also. I am waiting to do my shock last. I want to run it and get the best et with just the stuff I have and then add chassis mods then niyrous after im doing consistent 1.4 1.5 60 foot times. This year is gonna be great. First race is fontana feb 7th. Test and tune.

I need to being the papers for nhra just incase i run a 9.
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Offline Red

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Re: rear spring
« Reply #17 on: January 24, 2016, 08:08:54 PM »
Quote from: DougChan on October 04, 2015, 12:27:58 PM

Yes Big Race at Fontana.

N.M.C.A.

There will be bikes there too.

I got a rim and Shinko from Adam.

This should get me into the 6's at Irwindale now.


Has anyone seen Adam around lately ~ haven't heard from him since he moved .  .  .
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