Pitting on face of Primary clutch - REV-XR / XS Chassis - 4-TEC 1200 Performance and Trail Models - DOOTalk Forums

Jump to content

 






Photo

Pitting on face of Primary clutch


  • Please log in to reply
16 replies to this topic

#1 sam44

sam44

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts
  • Gender:Male
  • Location:Ontario
  • Sled:2016 1200 MXZX

Posted 12 March 2021 - 09:28 AM

Can someone tell me the cause of the pitting which can be seen (see pic) on the face of primary clutch on my 2016 1200? The Clutch has 22000 km on it. 

-The pitting is only on the moving sheave, absolutely not a mark on the fixed sheave. 

-The pitting is only around the middle third (mid speed section) of the moving sheave.

-The sec clutch has couple of minor divots, just a fraction of what can been seen on the pic. 

-Both clutches look in good condition, no broken bolts or rollers or other items. 

-There is no evidence of anything flying around in there. Belt guard and bellpan look perfect

 

Any suggestions on cause are appreciated. 

Attached Images

  • 1200 primary.jpg


#2 Tahquamenon

Tahquamenon

    Stay to the right, in your lane and slow down.

  • Members
  • PipPipPip
  • 1526 posts
  • Gender:Male
  • Location:Michigan
  • Interests:Snow Machines + Snow, winter, snow, winter.
  • Sled:XR1200Gade,RevXP600,Rev550x,S2K380

Posted 12 March 2021 - 09:57 AM

Looks like slight mfg defects...

Don't worry and ride!



#3 curbman

curbman

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts
  • Gender:Male
  • Location:Bentley, Alberta
  • Sled:Skidoo MXZX 2013 Custom eDrive 2

Posted 12 March 2021 - 10:34 AM

I would think something must of got in, even just a few seconds can do this type of damage. I would have the faces machined.



#4 CanGadeX

CanGadeX

    Advanced Member

  • Members
  • PipPipPip
  • 326 posts
  • Sled:2015 Skidoo Renagade X

Posted 12 March 2021 - 11:51 AM

Looks like slight mfg defects...
Don't worry and ride!


Not a defect and I wouldnt ride it like that could chew up belts in no time. Doodoctor does resurfacing.

#5 Flying_Dutchman

Flying_Dutchman

    Advanced Member

  • Members
  • PipPipPip
  • 239 posts
  • Gender:Male
  • Location:Plainfield, Ontario
  • Sled:2018 MXZ Blizzard 1200

Posted 12 March 2021 - 02:37 PM

I would have to think something got in there to cause that damage. Weird it's on one side only though. I would repair or replace, and not live with it like that. But that just me.



#6 sam44

sam44

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts
  • Gender:Male
  • Location:Ontario
  • Sled:2016 1200 MXZX

Posted 12 March 2021 - 03:20 PM

Thanks guys, 

The edges of those divets are quite rounded, so I think they have been there for quite a while.

Also, I've done 6000 km on the current belt and there is no unusual wear or belt dust. 

I had the sled at 110 MPH on an icy lake on the weekend, so the clutch performance doesn't seem to be too bad. 

 

I guess I'll ride it to end of season and then decide what to do.



#7 BCX

BCX

    Advanced Member

  • Members
  • PipPipPip
  • 2259 posts
  • Gender:Male
  • Location:Hamilton, Ontario
  • Interests:Sea dooing, quading , motorcycles
  • Sled:2014 Renegade 1200

Posted 12 March 2021 - 03:51 PM

I have a low mile e drive if you need

#8 David H

David H

    Advanced Member

  • Members
  • PipPipPip
  • 4289 posts
  • Gender:Male
  • Location:Minneapolis
  • Sled:11 RenX, 98 F3, 97 MXZ, 95 MX

Posted 12 March 2021 - 03:57 PM

Those holes are uniquely oval.  Possibly gas bubbles (hydrogen?) from the casting process?


David H
Excelsior, MN
 


#9 900mac

900mac

    Supreme Snowmobiler

  • Members
  • PipPipPip
  • 2023 posts
  • Gender:Male
  • Location:Vermont+Quebec
  • Sled:2020 enduro 900t, 2021 Polaris 600

Posted 12 March 2021 - 06:37 PM

Ride, it will make the belt grip better.



#10 SBT

SBT

    Advanced Member

  • Members
  • PipPipPip
  • 1265 posts
  • Gender:Male
  • Location:Arnprior Ontario
  • Interests:sledding, being outdoors in general
  • Sled:2022 XRS 900R

Posted 13 March 2021 - 02:55 PM

Friend bought a 1200 with a pb80 on it that was 10x worse than that, used the bad clutch to negotiate a better deal (said he'd have to replace it) and then proceeded to drive it for 4 more years the way it was...never had any belt issues.



#11 sam44

sam44

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts
  • Gender:Male
  • Location:Ontario
  • Sled:2016 1200 MXZX

Posted 08 April 2021 - 09:55 AM

Update on the pitting on face of my Primary clutch:

 

It looks like the damage may have been done the head of a bolt which broke on the secondary clutch. The head is missing from one of the roller bolts on the secondary (see pic)

 

Do anyone have suggestions regarding how I can remove this broken bolt from the secondary? Do you know if this bolt is red loctited?

Attached Images

  • Sec bolt broken1.jpg


#12 YBKewl

YBKewl

    Advanced Member

  • Members
  • PipPipPip
  • 37 posts
  • Sled:Renegade X 1200 2012

Posted 08 April 2021 - 02:16 PM

You can see in the last picture that you also got damage on the secondary sheaves. The pitting not drastic because luckily only the head ripped off. Would it have been the complete bolt on a long high speed run and it would have been a completely different story.

 

To have the sheaves machined is the absolute best way to fix this, short of replacing both pulleys.

...

but

...

on my personal sled, I have slighty more damaged sheaves than yours. I sanded the pulleys with sandpaper to remove the high spot of the craters. It's been 4 years and 22 000km, and I had no other failure, no lost in performance and I only changed my belts as a preventive maintenance every 10 000km.


Edited by YBKewl, 08 April 2021 - 02:18 PM.


#13 sam44

sam44

    Advanced Member

  • Members
  • PipPipPip
  • 274 posts
  • Gender:Male
  • Location:Ontario
  • Sled:2016 1200 MXZX

Posted 08 April 2021 - 07:44 PM

Yes, there is slight damage also on the secondary, including a couple of spots with embedded metal. It should be fixable. 

 

The big question is how do I remove that broken bolt?? Any ideas welcome. 



#14 BCX

BCX

    Advanced Member

  • Members
  • PipPipPip
  • 2259 posts
  • Gender:Male
  • Location:Hamilton, Ontario
  • Interests:Sea dooing, quading , motorcycles
  • Sled:2014 Renegade 1200

Posted 08 April 2021 - 08:01 PM

So your best bet is to remove the helix to start. There is either a c clip on the end of the screw or a roll pin so it won’t back out. That will need to be removed. Then you can try with a punch and hammer to back the rest of the bolt out. Left hand drill bit or a regular drill bit and easy out.

#15 YBKewl

YBKewl

    Advanced Member

  • Members
  • PipPipPip
  • 37 posts
  • Sled:Renegade X 1200 2012

Posted 09 April 2021 - 07:41 AM

So your best bet is to remove the helix to start. There is either a c clip on the end of the screw or a roll pin so it won’t back out. That will need to be removed. Then you can try with a punch and hammer to back the rest of the bolt out. Left hand drill bit or a regular drill bit and easy out.

 

That ^ and apply heat were the bolt is threaded to loosen the high strength Locktite.

 

With the helix removed, you could also break the roller with a chisel and remove the bolt using wise-grip.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users