Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    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.

Ulf Löfstedt

Yamaha Big Bear 350 1992 slipping clutch

Recommended Posts

I just bought a Yamaha Big Bear 350 from 1992. The previous owner has run it on regular engine oil and I have problems with the clutch slipping. I think that's the reason.

So what should I do?

- Just change oil and it will be OK?
- Clean engine/clutch + new oil?
- Or do I need a new clutch?

It is guessing the centrifugal clutch that slips. It has two clutches , it also has a "regular" clutch .

Anyone who has any experience of using wrong type of oil?

Share this post


Link to post
Share on other sites

Change the oil. There should be an adjustment screw that squeezes the clutch plates together. This reduces excessive gap between the plates caused by normal wear.

I don't know where it is on your machine. Hopefully some one else will respond with that.

  • Like 1

Share this post


Link to post
Share on other sites

I would drain the oil, pull the cover and inspect everything. Maybe an adjustment or new plates and springs might be in order. Who knows what the previous did. He may have beat it up a bit.  But I would definitely take a look inside.   

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 Tagged Content

    • By jolio
      Just got a '98 Yamaha big bear 4x4 in working condition (so far). Looking forward for some good information on this site about how to keep it alive.
    • By Muskyjim
      I recently purchased a 99 big bear 350 2x4 that was sitting for a while got it running and went to take it for a ride after about 10 minutes into the ride it stalled and wouldn't let me shift down into neutral tried rocking it back and forth but will not go into neutral...can anyone point me in the right direction on where to start?
    • By Gsk1500
      The clutch cover goes on and fits, but the little L chapped arm that has gear slots is concerning me.  It appears it goes to wear the clutch adjust bolts are on the cover. 
      Is there a specific way to tell how it mounts on the gears in relationship with the basket?
      I don't want to deal it up unless it's right 
    • By Christy Miller
      Need a wire diagram for 
      99 big bear 350 4x4 can anyone help I have no spark my roommate drove it ended up losing the battery and it grounded out a.wire in the middle of harness was burned to BEAR any suggestions ty
    • By xXDaveXx
      https://www.amazon.com/Primary-1998-2005-Polaris-Sportsman-Braking/dp/B01G2EEUV2
      Anyone ever try these? $500 for a OEM clutch seems high, But $120 seems a little cheap to me. Has anyone tried one with good luck? 
  • Similar Topics

    • By VikingTrad3r
      picked up my third timberwolf 250 for my daughters.  these are great light weight little quads.
       
      have a strange one for you.  the quad will NOT start in neutral.  it will start in first. 
      if i lift up on the gear selector just enough to hear the little click (its not loud, sounds like a contact clicking, perhaps the neutral safety switch?) the light will go out, but it won't yet be in first either.  that is how i have shown my daughter to start it and she can.
       
      id like to carry out whatever repair is needed.  i have the pdf of the shop manual but it doesn't really have a flow through diagram.
       
      any help appreciated!  thank you.
      i need to add something.  it feels like i can switch into another gear BELOW neutral.  
      so if i switch to neutral, i can keep pushing the gear selector, and it has another click below the neutral.  the light stays on, and when i pull up into first it kind of feels like it has two positions it moves through to arrive at first.
    • By JJ78
      I have a yamaha big bear 400, tested all fuses and relays. When I turn on key I get nothing, no neutral light or headlights. Could it be the key switch bad?
       
    • By Asen_77
      Hi All,
      My name is Asen and I am from Eastern Europe, Bulgaria. Riding a Yamaha Raptor 700R and this is my first Quad wanted for a vey long time :)

       
    • By Blenderite
      Hello guys! New to the forum, and fairly new to ATVs. I've driven them, but never owned one. Now I do own one. Just picked it up today. It's a 1999 Yamaha Big Bear 350. It's been through some stuff. The guy I got it from told me the previous owner removed the front diff because he didn't want to replace the half shaft. So it's 2wd, even though it's supposed to be 4x4. Lovely. I can deal with that for now.
       
      More importantly, I need to get it running. The carb needs to be rebuilt. The guy I got it from said he sprayed it all out and it still didn't work. I'm concerned he might have damaged it or not put all the parts back. I was looking at a replacement carb, and the OEM parts is $600. I'd rather not spend $600 if there are any other options. I have seen carbs on Amazon and eBay that are in the $40 - $100 range that say they fit. Anyone have experience with these? I'm going to get a rebuild kit for the current carb just to make sure that won't fix it.
       
      Thats the first thing with it. Secondly, it was completely rewired. I need to find a original wiring diagram so I can put it back how it was, with a key and all. Currently it's wired with just a rocker switch. Any sources for a service manual that would include wiring diagrams?
       
      Thirdly, is the Big Bear 350 a good atv? I picked it up for $700. It does start and run when you spray starting fluid into the air intake, so I am not concerned about the engine being bad. I plan to use it for the farm, running around and carrying things with it like minerals and feed and such. Not really for mudding and things like that. How good is the 99 350?
       
      I am certain I will have more questions as I examine it more, but that's all for now. Thanks in advance for the assistance!
       
      -Blenderite
    • By jolio
      Just got a '98 Yamaha big bear 4x4 in working condition (so far). Looking forward for some good information on this site about how to keep it alive.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...