Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

MarkinAR

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.

Share this post


Link to post
Share on other sites


I didn’t even see this post for some reason.   I don’t think it would work since the washer you could only really fit in would be a 16th of an inch think ? How much grab do you think you would gain ? And how long would it last anyways? 

Share this post


Link to post
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.

Share this post


Link to post
Share on other sites

Yeah well planning is not always on the forefront with these people. If you go back and look at one of my threads on my Bayou, there was a neutral safety switch. Worst design everrrrrrrrrr! So I could see it on Yam behalf also.  

Share this post


Link to post
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. 

Share this post


Link to post
Share on other sites

Listen man I’m all for that idea so let’s get after it and throw some washers in. Be sure to use thread lock so nothing comes loose! 

Share this post


Link to post
Share on other sites

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. 

Share this post


Link to post
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. 

Share this post


Link to post
Share on other sites

Mystery somewhat solved. The threads in the case for the adjustment screw are completely gone so adjusting is best guess based on feel. Without threads it's also not keeping pressure on the clutch. 

Share this post


Link to post
Share on other sites


Gonna pull the side of the case again and inspect. Hopefully I can drill and tap a size up and use a bolt nut combo to replicate the current function. Not sure as I've not looked at the way it's made but surely I can replicate the function. 

Share this post


Link to post
Share on other sites

Probably can be drilled out at tapped just go slow and lots of oil.  I would also stick with a metric bolt and def thread lock when you reassemble.  

 

Share this post


Link to post
Share on other sites

Not sure thread lock would be a wise idea since it would still need to be adjustable. Seems this is going to be a rig job....

Share this post


Link to post
Share on other sites


So the clutch still wants to slip a bit if you throw it WOT in middle gears but doesnt slip if you ease it to WOT. Probably centrifugal clutch. But anywho, here's a couple shots from yesterday's ride. 

IMG952976.jpg

IMG952975.png

Share this post


Link to post
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.

Guest
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 YamahaGrizzly
      Billy went all out and bought N2deep Snorkels, Rubber Down customs Rad kit and Rox speed fx Risers for his Grizzly 700. It took a solid 3 days in the shed to install all this new gear on Billys Yamaha grizzly 700! We cant wait for the next time we get out and go on a run! should be this week actually! gonna be good to get the Yamahas grizzlys and Kodiak together!
    • By Frank Angerano
      Not sure how many of you will remember this or give a crap about it but back in 2016 I picked up my first old atv to rebuild. Yamaha bear tracker 250. I picked it up in NJ while I was out looking for a quad for my little guy since he started this atv thing after seeing a few old pictures of me in my hay day riding. 
       
      The person I was getting the 50cc quad had this one laying around and asked if I was interested in it.  It was beat up and hadn’t ran in a few years.  No spark the guy said and he left it to sit.  I wound up taking both bikes. 
      I wish I had pics but I deleted the original post on Quadcrazy and lost the old ones on my phone when I upgraded. 
      This was the atv that caused me to stumble upon Quadcrazy since I needed a little help with the spark issue.  So needless to say I fixed it, did some cosmetic work and she was good to go. I took it upstate and used the shit out of it for just about everything under the sun. This atv made it through some deep snow, mud etc. I decided to leave it up there and use it as a back up since it’s been about 50 atv’s later and I have newer machines now. But unfortunately it sat for some time and it’s a little beat up so I brought it back home and going to clean it up. Amazing how one year sitting has done so much damage. 
      This was the first atv that I owned in over 30 years! It’s the atv that brought me here to Quadcrazy where now I endlessly check the site to see what’s going on, who’s talking about what and who can we help with there problem or can help me with mine as well as the on slot of what I do today as a hobby with atv’s. It’s been a great pass time for me and my son with the projects we have gotten and get into. He’s learned how to ride so well it scares me a little watching him. He’s learned how to fix, maintain and upgrade atv’s. He’s insanely good with carburetors as well. 
      It’s a good thing when a kid wants to play in the garage over his X Box!!
      The funny thing about this bike is that when we finished it we thought it was the best thing! We were missing a rack on the front and didn’t care since it looked ok, had no clue where to get parts or how to fix plastics. I was so new to this again since I was staring all over again and now had to remember things and also teach my son!  
      So we will be tearing into the bear tracker to get her up and running again as well as maybe a few new cosmetic changes and hang on to her for a while since I love this bike.  The last two pics are the bike the day we finished putting it all back together and when it was upstate for the first week. 
       
      Had no intention of this post going so long. 🤷🏻‍♂️







    • By Richard Paradise
      My 1997 Beg Bear got stuck in 2nd Gear when parked on slight hill, otherwise in perfect shape. Trying to get it into neutral, by rocking it back and forth won't release out of gear.
      Any suggestions, It's my work horse and I keep it in to shape, got to get it running..
    • By zont
      Hi, I have just purchased a 2002 Yamaha Kodiak 400 I think, the vin has worn off and I have located an engine number I think it is J312E-004674, could anyone tell me where the engine number might be please
    • By mothrottle
      Does a US made grease gun fit Metric zerk fittings, or do I need a conversion to fit them?  Thanks in advance.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...