Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: dk on July 28, 2012, 04:22:15 AM

Title: Clutch Plate Life Question - 2005 YZ 125
Post by: dk on July 28, 2012, 04:22:15 AM
I have owned a 2005 yz 125 for the past 6 months and recently decided to do the 'shift stopper fix'.  While I was inside the clutch I figured I would replace the clutch plates since they are the original plates and I had the bike open. 

I measured the thickness of the plates and they were within spec (3mm), however the springs were out of spec. 

New springs have been purchased but I am hesitant to pick up the new plates.  The bike seems to run fine but the pads on the clutch plates look glazed.

My question - Is there a general rule to replace clutch plates over time even if they are still within spec? Am I just looking for an excuse to spend money? 

Thanks - dk
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: TMKIWI on July 28, 2012, 08:11:48 AM
Yes you are looking for an excuse. ;D
There is no set time to replace plates.
Too many variables. Hours, how hard you ride etc.
If they are in spec and nothing is warped , put them back in.
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: SachsGS on July 28, 2012, 03:14:56 PM
You checked both the fibre and metal plates?
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: dk on July 28, 2012, 06:13:43 PM
Quote from: SachsGS on July 28, 2012, 10:14:56 PM
You checked both the fibre and metal plates?

Sachs - I checked both (metal/fiber).  Metal plates are not blued and lay flat.
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: dk on July 28, 2012, 06:20:37 PM
Quote from: TMKIWI on July 28, 2012, 03:11:48 PM
Yes you are looking for an excuse. ;D
There is no set time to replace plates.
Too many variables. Hours, how hard you ride etc.
If they are in spec and nothing is warped , put them back in.

TMKIWI - I like your take on the plates.  My budget appreciates it as well!  I have never replaced a clutch before and I was expecting to find some warn parts.  To my suprise all looked pretty good but wanted to reach out to you all and get some opinions.  Thanks
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: nom de guerre on July 28, 2012, 06:25:45 PM
With all that you have said DK, I would just re-spring and ride... (i would use some heavy duty/longer springs)
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: MXLord327 on August 01, 2012, 02:37:01 PM
If your clutch doesn't slip at WOT under a heavy load even with worn springs, I would say your plates are fine.
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: dk on August 01, 2012, 08:06:34 PM
Quote from: MXLord327 on August 01, 2012, 09:37:01 PM
If your clutch doesn't slip at WOT under a heavy load even with worn springs, I would say your plates are fine.

Thanks for all the inputs!  I bought new springs already and put them in anyways.  As I was doing this I was thinking 'does this really matter'.  Oh well.  Old plates and new springs.  Its all buttoned up now and ready to ride this weekend. 

Thanks again for the insight.
Title: Clutch Plate Life Question - 2005 YZ 125
Post by: TotalNZ on August 02, 2012, 06:34:21 AM
Na, run them till they start to slip. No point changing them if they still doing the job.