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GS500 Race Build

Started by Kurlon, March 09, 2008, 09:53:12 AM

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Kurlon

Jetting is jetting, Loudon isn't significantly high up so if it works in New England it'll get the job done there.

On the damping rods, I haven't had mine reworked yet.
1991 GS500E - LRRS/CCS Novice #771

intergalactic

For some reason on some other forum I was under the opinion that you might have deviated from what is on the wiki. So you are still running sludge in the forks, huh? Maybe I want 20W-50 for when the forks heat up =)
1992 GS500E- 40/125 jets, '08 petcock
Aerostich roadcrafter/Sidi Vortice Air/Shoei X-11/Cortech Scarab gloves
SS front line (thanks ineedanap!)
metisse sliders (thanks grayghost) still working on the front motor mount
1992 GSXR600 shock .95kg/mm fronts springs, 20W oil
Yama JN6-F4560-00 filte

Kurlon

Oh, yeah, I'm leaner than the wiki suggests.  I've got to pull my notes to find the exact setup I've got at the moment.  I've been fighting a horrible midrange hole, and think I've got a good bit of it eliminated finally, but now that I've got my shift points refined a bit I don't find myself letting the revs drop to that range.
1991 GS500E - LRRS/CCS Novice #771

Bonesaw

You mentioned at the beginning of this thread that there was a knock from the motor, I have a similar issue and it turned out to be the counter balance shaft bearings, dont know if its still an issue for you but if your still racing it you may want to investigate it further.
Bonesaw

lamoun

Quote from: Kurlon on December 29, 2008, 02:58:57 PM

The compression damping is controlled by the emulator, and it's working fine.  I can get proper compression using the emulator and 10w oil.  It's the rebound that needs to be reigned in, only way to get decent rebound control is with 30w oil.  The fix, rework the rebound ports on the damping rods.

HOLY COW RESURRECTION!  :icon_razz:

Kurlon I closed shut the rebound holes on the damping rods a couple days back.

Difference? Minimal to none. it seems 30w is the way to go..

Kurlon

Wow?!  Those forks should come to a complete stop with no rebound holes.  Sounds like there is some serious slop in the bushings too then?  My bike has since gone back to being a street mule with my wife the primary pilot so I haven't bothered to chase the forks further.  If I do anything I need to go to lighter springs for her next, it's a bit nervous on rough pavement with all that road race preload in place.
1991 GS500E - LRRS/CCS Novice #771

lamoun

#46
Yeap, too much slop, and considering what sportrider says, it seems the GS hasn't got a very controllable leakage.

"On the rebound stroke (figure 2), chamber B is getting smaller and the floating check valve is closed. The fluid escapes from this chamber two ways: through the rebound hole in the damping rod and through controlled leakage between the damping rod and the check valve itself." - http://www.sportrider.com/tech/146_9502_tech/index.html

(Of course, considering the rebound hole was about 1,5mm - 2mm in diameter, it ain't no mystery there is no apparent change in damping.)

Congrats on the wife! Lighter springs and less damping all around will surely make a comfortable ride!


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