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Author Topic: Kevlar or carbon fiber clutch discs ?  (Read 415 times)

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Farm boy

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Kevlar or carbon fiber clutch discs ?
« on: August 30, 2019, 09:33:00 PM »

I could use some expertise on this. I am sure they both have their place. Bike: '03 se road king 103 - 128 tq / 107 hp. Has stock clutch, not holding when on it two up. It's only slipped a couple of times. I am careful now, when getting on it.
Anyhow,  am planning on going with Barnett extra disc set and possibly the coil spring conversion. The extra $200 for the  scorpion clutch is not in the budget at the moment.
Which is going to be better for 2up touring ? :nixweiss:
TIA,
Fb
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HOGMIKE

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #1 on: August 30, 2019, 11:20:14 PM »

I could use some expertise on this. I am sure they both have their place. Bike: '03 se road king 103 - 128 tq / 107 hp. Has stock clutch, not holding when on it two up. It's only slipped a couple of times. I am careful now, when getting on it.
Anyhow,  am planning on going with Barnett extra disc set and possibly the coil spring conversion. The extra $200 for the  scorpion clutch is not in the budget at the moment.
Which is going to be better for 2up touring ? :nixweiss:
TIA,
Fb

I’ve got the extra plate Kevlar with similar power what you have and it still slipped a little BUT I’m using the stock spring, solo riding.
You May be ok with a stiffer spring with 2 up.
Keep us posted on what you decide, I’d be interested.
 :nixweiss:
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HOGMIKE

Smoketown

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #2 on: August 31, 2019, 09:20:09 AM »

How many miles on the clutch?

Is it properly adjusted?

How much friction material is left on the disks? Check your service manual. There is a minimum thickness just like your brakes.

What oil are you using in the primary? Some oils tend to be 'slipperier' than others.

A stock clutch can handle quite a bit of hp and torque. The main replacement parts discussed on most forums involve springs and (for the lack of the proper term,) the outer pressure plate.

Now, if your clutch has reached the end of its useful life, ANY Barnett clutch is a good way to go!

Cheers,
Smoketown
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Farm boy

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #3 on: August 31, 2019, 11:15:51 PM »

Bike has 11k mi. on it. ATF for lube. I will go through and adjust the clutch again.  May have got something off.
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Ironhorse

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #4 on: August 31, 2019, 11:17:42 PM »

Pardon my ignorance, but how do you adjust the clutch? Isn't it hydraulic?
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"But men are men, the best sometimes forget" Shakespeare, Othello Act 2, Scene 3

Smoketown

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #5 on: September 01, 2019, 10:35:35 AM »

Pardon my ignorance, but how do you adjust the clutch? Isn't it hydraulic?

I don't have an 03 RK service manual so, I don't know either ...

I DO know that my 2013  Touring Model Service Manual has instructions for clutch adjustment even though the model that I have come STOCK with a hydraulic clutch.

I had to buy the danged "supplement" to verify that it was "non-adjustable" ... Gotta love the MOCO ...   :soapbox:

Cheers,
Smoketown
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Farm boy

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #6 on: September 01, 2019, 05:24:53 PM »

The '03 has a hydraulic clutch as well, but it looks like I can adjust clutch itself. Am I wrong ???
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Farm boy

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #7 on: September 08, 2019, 09:41:47 PM »

Adjusted the clutch per fsm. Is better now, but slips occasionally.  I just stay out of it, when two up.
Checked with Barnett - use carbon fiber, abd can use diaphragm spring.
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Twolanerider

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #8 on: September 08, 2019, 11:01:23 PM »

The '03 has a hydraulic clutch as well, but it looks like I can adjust clutch itself. Am I wrong ???


No adjustment for hydraulic clutch.  Instructions for bikes with cable operated clutches don't apply and the adjustment mechanisms (at either end) don't exist on the hydraulic clutch bikes.
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barrhill

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #9 on: September 09, 2019, 08:31:46 PM »

how about AIM ( centrifugal assist ) no added lever effort and a 10min install

   aim-tamachi.com

https://aim-tamachi.com/

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2012 road glide  in maple , GMR 117,600 gmr cams , fullsac pipes and slipons , S&S crank and oil pump , TTS ,Barnett scorpion , 58mm oval HPI ,DD7   2008 CVO road king in copper with 16 apes ,fullsac baffles, SE tuner

CVODON

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Re: Kevlar or carbon fiber clutch discs ?
« Reply #10 on: September 10, 2019, 08:52:29 AM »

There are just no adjustments on the hydraulic clutches. Proper bleeding is a must but otherwise..
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