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Dan K
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« on: May 19, 2011, 06:32:17 PM »

The new bike seems to have a slipping clutch, and the plates in the old bike are used.  I've decided to upgrade the whole deal to be done with it.

So far, from reading this site and talking to other EX racers, it seem the hot setup is Barnett plates and ZX-6 springs (PN 501-50-05055)

I've found the plates for $115 shipped and the springs for $21 shipped.

I could get the complete Barnett kit for $144 shipped including plates, springs and steel spacing plates, but they'd be the ex500 springs.  I gather that I want the ZX6 springs.

Should I source and buy replacement steel plates as well?  They don't seem like they would wear much if at all.  I'd think just kevlar plates and new springs would do me?

Am I right to think that I want the ZX6 springs and Barnett kevlar plates for the EX500?  Should I just buy the complete kit for the $145 and deal with EX springs?

This is exclusively a race bike.  I don't care about comfort, pull effort, etc.  I want strong launches, no slipping, and maximum life through abuse. 

TIA for any input.
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« Reply #1 on: May 19, 2011, 06:39:56 PM »

Ya prolly only need the springs. Try them first. never saw a worn out EX clutch.

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Dan K
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« Reply #2 on: May 19, 2011, 10:09:57 PM »

Thanks FOG.

Thing is, next time this bike gets run is the Penguin 2 day pro school.  Day after the school is the classic, our biggest race of the season.  I'd rather spend the extra $100 or whatever on plates than risk having issues through pro school and the classic.  Even if it's 98% sure it's just springs, the 2% chance isn't worth it to me.  So, all that said, Barnett plates?  Which springs?  I assume from your post I can stay with stock steel plates.
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« Reply #3 on: May 21, 2011, 08:52:53 AM »

Fine Say Hi to Jerry Jeff anf Curry for me.

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kanatuna
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« Reply #4 on: May 24, 2011, 11:31:11 AM »

I run stock clutches, I just space the springs to make stiffer.  A whole $0.75 investment.
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« Reply #5 on: May 24, 2011, 12:23:37 PM »

Yeah I told them you could shim them with washers. Took three post to explain how too.

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The Villain
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« Reply #6 on: May 24, 2011, 12:26:50 PM »

Could you explain it again for me, pretty please?
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« Reply #7 on: May 24, 2011, 02:22:25 PM »

Step 1: get washers
Step 2: use washers to shim clutch springs
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FloridaEX500
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« Reply #8 on: May 24, 2011, 03:03:53 PM »

Can't you use electrical tape?

 Haha just kidding.

Ok how about duct tape? That's a lot cheaper.  LOL.
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Kahooli
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« Reply #9 on: May 24, 2011, 03:24:37 PM »

Can't you use electrical tape?

 Haha just kidding.

Ok how about duct tape? That's a lot cheaper.  LOL.

In the spirit of another post,
what (from the contents of an average trash) can could I use to shim the springs?

lololol.
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FloridaEX500
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« Reply #10 on: May 24, 2011, 03:50:51 PM »

Metric washers? Or US? And which side of the spring do we put them on?
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montnrdr
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« Reply #11 on: May 24, 2011, 04:09:58 PM »

I vote for duct tape(JK). Grin
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FloridaEX500
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« Reply #12 on: May 24, 2011, 04:22:46 PM »

No not just any duct tape it has to be previously used 
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6 Fingered Man
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« Reply #13 on: June 13, 2011, 09:51:52 AM »

The new bike seems to have a slipping clutch, and the plates in the old bike are used.  I've decided to upgrade the whole deal to be done with it.

So far, from reading this site and talking to other EX racers, it seem the hot setup is Barnett plates and ZX-6 springs (PN 501-50-05055)

I've found the plates for $115 shipped and the springs for $21 shipped.

I could get the complete Barnett kit for $144 shipped including plates, springs and steel spacing plates, but they'd be the ex500 springs.  I gather that I want the ZX6 springs.

Should I source and buy replacement steel plates as well?  They don't seem like they would wear much if at all.  I'd think just kevlar plates and new springs would do me?

Am I right to think that I want the ZX6 springs and Barnett kevlar plates for the EX500?  Should I just buy the complete kit for the $145 and deal with EX springs?

This is exclusively a race bike.  I don't care about comfort, pull effort, etc.  I want strong launches, no slipping, and maximum life through abuse. 

TIA for any input.

Have you looked into ZX6 springs, or any aftermarket springs and friction plates are PTwins legal? Your beating the normal winners on a semi regular basis. Not gona take much for somone to get a hair across their ass and complain.  Just put the stock shit back in. EX makes about 12hp, I have 12'oclockd on off the start on a stock clutch..  They will hold.

And with Jeff Wood riding Ptwins this week might be a bit more attention paid to the class. Put the stock (legal) stuff in the bike.
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« Reply #14 on: June 19, 2011, 07:54:42 AM »

If your going to Race against Jeff, Don't worry about the Springs ,you'll need a Rocket up your ass, to just see him. Buck says he  lapps you in 4 laps.
BTW  clutches and springs are OK upgrades, They are ecpendable same as tires.
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« Reply #15 on: June 19, 2011, 08:38:15 AM »

I run stock clutches, I just space the springs to make stiffer.  A whole $0.75 investment.

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elanimal28
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« Reply #16 on: June 22, 2011, 03:11:37 AM »

Yeah I told them you could shim them with washers. Took three post to explain how too.

FOG

say for a race bike, where do I start? washer thickness?
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« Reply #17 on: June 22, 2011, 04:29:04 PM »

Put as many as you want, the limit is the springs stacking.

FOG
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« Reply #18 on: July 05, 2011, 04:38:27 PM »

LMAO  just take a spring and the bolt out.... find a washer that fits close to the inside and outside diameter.  Put it at the base of the spring and follow those steps until you have done it to all the bolts.  If its not stiff enough with one washer....add another.  I think I run two per spring...  Dont get overly concerned with the thickness.  Get the springs from the same bin and your fine. lol
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« Reply #19 on: August 03, 2011, 09:14:02 PM »

It's pretty easy to measure the plates to see if they are worn or not.  I would do that rather than just blindly spend money on the clutch plates.

My clutch plates were fine on my CBR, but the springs were pretty much shot.  I took a set out of another engine (I have two for the CBR) and they were OK.
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luco.vico
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« Reply #20 on: August 20, 2011, 07:47:16 PM »

so shimming the springs has the same effect as getting the ZX6 springs?
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« Reply #21 on: June 25, 2013, 04:48:26 PM »

Shimming have same effect as new springs?
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