Jump to content

  • Do you own an ATV or UTV? Join our Forum!

    Join QUADCRAZY ATV Forum today for FREE! We keep these forums clean and user friendly. All first posters will have to wait to have their content reviewed and approved. Once your first post is approved, you will no longer need to got through an approval process. To gain immediate approval and a NO ADS experience, consider subsribing to our Premium Membership.

Clutch slip - ever tried a little more pressure?


Recommended Posts

Passing thought here and thought I'd pitch it to the group for debate.  I'm working through a Kodiak which is basically a Big Bear in a heavier bike and the same as about anything Japanese made for 30 years as far as clutch function and design goes.  This Kodiak is odd though in that the centrifugal clutch slipped a bit with good clutch material remaining and the main clutch pack seems to slip a bit as well at high RPM but also still has good clutch material left.  Much like the Kawa race bikes from what I've read.  Do you think it's an option to add a thin washer to the pressure bolts to put a bit more pressure on the main clutch and force it to use a bit more of the clutch material before having to replace?  There's seriously like 50% of fiber left on the main clutch pack and it seems silly to replace it all before it's truly worn down.

Link to comment
Share on other sites

Given that the clutch packs are maybe 1/8th of an inch thick and those have lasted 26 years, i would think 1/16th of an inch might buy a couple of years.

Just thinking outside of the box.  It just doesn't make sense that it would be slipping with 50% of clutch material left; but it doesn't seem to be all that unusual.  Just seems like odd planning on Yamaha's part.

Link to comment
Share on other sites

I've read the kFX450 wears out at 50% and you need to put stronger springs in it so it doesn't do it again. That's where I'm getting the idea that maybe the kodiak is the same. The 220 bayou though would grab fine with just enough fiber remaining to cast a shadow. Crazy how they are about all the same but have little behavior quirks. 

Link to comment
Share on other sites

4 hours ago, XWrench3 said:

if it is the clutch PACK slipping, then yes, a set of washers may help for a while. stronger springs would be a better choice.  it also could just be improperly adjusted.  but if its the centrifugal clutch slipping,  you may be out of luck. 

Centrifugal clutch I regrooved and worked the drum smooth. Seems to pull fine until you hit WOT so I'm pretty sure it's a clutch pack issue. Thanks for the input. I'll try readjusting when it's back together and if that doesn't work shim the springs a bit. 

Link to comment
Share on other sites

  • 2 weeks later...
  • 2 months later...

Update on this one: rear ujoint on the front driveshaft took a crap, got the yoke in a bind, and dropped the middle drive gear on the ground, shredded the yoke, snapped the transfer case in half.   Yes, completely broke it off and it hit the ground.  On the plus side though, i picked up a complete transfer case from Grumpy's for $85 and another $30 for yoke and ujoint and started putting it back together last night.  It's going on the market as soon as it's back together.  This one is a turd, too many previous "mechanics" have about ruined it.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By Faroe
      Hi there.
      I have a 2002 Bear Tracker that doesn't spark.
      I want to test the CDI box but can't figure out how to test it.
      The CDI box is one that has a plug, with eight poles (see picture).
      Does anyone know how to test?

    • By mga
      I just brought home a used 2005 Yamaha Big Bear 400 4x4. It needs front wheel bearings, and a new choke cable. I think i can handle those two items. However, when i went to look at it, it ran good, shifted good, brakes all workds great, but at home when i started it, it would idle nice, but when i gave it gas it seemed like it was flooding out and would die. If i just gave it a little throttle it built up RPMs but any more throttle it began dying out again.
      any suggestions why it's doing that? 
      I'm looking for a service manual, but forum rules say i have to make 10 posts..lol
      oops...i just realized i posted in the wrong section of the forum!!
    • By bstorm
      Can anyone tell me if a 2004 Yamaha Kodiak 450 cooling system needs to be bled after a coolant change?
      Thank you for your help.
    • By Gwbarm
      Finally getting around to the Yamaha Big Bear that followed me home in August. It is a mess. I got it off of marketplace, the add stated " runs like nothing is wrong the only thing that's wrong is it needs a new wiring harness". So iv been looking for a new wiring harness although it came with a wiring harness that was out of the bike, so I assumed he had ripped it out. All the plastics were off and no screws or bolts to reinstall but they were in good shape. The coil, voltage regulator and starter solenoid was missing but came with new one. So I go out expecting to start installing the wiring harness and find out its still in tact with these parts missing. The first thing I found was the engine was stuck and there was no spark plug in it. I noticed when I bought it that the pull starter wouldn't rotate the engine but he assured me the engine wasn't stuck that there was something wrong with the pull starter, I was skeptical but took him at his word. I didn't check it that closely because I was really just buying it for the tires and wheels they were worth twice what I paid for the bike. Im a little new at buying on marketplace and am just angry that someone would lie like that, now I don't know if anything is really wrong with the wiring harness, im probably too trusting I usually trust people until they give me a reason not too. I would have bought it anyway, if I go to the trouble of hooking up my trailer and wench and driving there its coming home with me, long as its a Honda or Yamaha I can fix it. It took PB Blaster about 24 hr and I got the engine freed up, and it has good compression, using ye ole thumb over the hole test, and the pull starter works fine Thats enough of that, now for my real question, before I go to the trouble of chasing the wiring problem down I would like to see if the engine is ok , is there anyway to feed voltage directly into the cdi to make it spark. 
    • By Yamaha250
      I have a 1999 Yamaha bear tracker 250 that needs  carburetor but I really can't afford a new one right now $650 at the dealer is there an older style o could use that would work 
  • Gallery Images

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...