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.

grego86

88 Yamaha Big Bear DIF yoke removal

Recommended Posts

My front dif is leaking oil pretty bad around the yoke. I completely pulled the whole dif from my bike and now stuck trying to get the yoke unbolted from the dif body. There's a large nut in the center of the yoke and I've tried using impact wrench and not budging. The nut and bolt kind of looks like it has a crimp spot made to keep it from backing off the bolt I guess. Does that sound right? What's the easiest way to remove it? Just soak with some type of lube and try again with the impact?

Share this post


Link to post
Share on other sites


That  is  just a   self locking  nut. I  can't tell whether someone  has  used a punch on it  to   lock it tighter  or  not  with the crud  in the  thread above it, but  it  should  come  undone  using an  impact  wrench.  Clean  the   thread above the dent in the   nut  to ass if the thread of the shaft is damaged..  If it  is, you  could  grind away the  damaged  spot  under  the  dent, but  you  likely  don't  need to grind anything away. also , when you  clean  the   shaft to  get a better  look,  make sure it is   regular right hand thread. It  appears to be  from  what  little I can see of it , but make  sure.

Use a big  pipe wrench to  keep the  yoke from  turning,  and use a  good  air or electric impact wrench to spin the nut off..

Edited by davefrombc

Share this post


Link to post
Share on other sites

I doubt the  nut  has a spring pin  holding it ..   Clean  it  off and look. If there's a hole drilled  through it, it  has one , but that  nut  looks  like a regular  self  locker to me.

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 StolenATV
      On Wednesday, September 18, our ATV was stolen from in front of our house after the locks were cut. This was around 2-3:15 AM.
      We realize the likelihood of ever finding the four-wheeler again is slim to none, but we had to try and put the word out there. We have put countless hours in to restoring this Banshee. It was more than just a passion project, it also was our investment for a down payment for our future house. We are devastated and beyond heart-broken. If you see any suspicious postings on Facebook Marketplace, Letgo, Craigslist, etc., or have any other information, please contact us or the Prince William County PD.
      *Update* We received a tip last night that it was possibly posted on Facebook Marketplace around 8AM yesterday morning with only pictures of the front and of the back of the ATV. The description only said: PM for more details. This came up in someone’s FB Marketplace feed that has it set for a 50 mile radius from Hartwood, VA. She also has her feed set to automatically translate everything into Spanish, so It could also possibly be posted in Spanish.
      WHAT WAS STOLEN:
      2004 Yamaha Banshee YFZ 350
      White plastics with bright green and pink graphics/stickers
      STOLEN FROM:
      Prince William County, Triangle, Virginia
      $500 REWARD FOR INFORMATION LEADING TO RECOVERY. BONUS FOR CONVICTION.
      The post Stolen From Our Front Porch – 2004 Yamaha Banshee YFZ 350 appeared first on STOLEN 911.
      View the full article
    • By Mo Salem
      So my front hub broke, I’d like to put aftermarket on. Hard to find new oe ones. Please help. I’m new to all of this, I have some car knowledge and try to apply it
    • By StolenATV
      1987 Suzuki LT 80 and 2007 Honda CRF 50 dirt bike stolen out of my driveway on July 4th. Anyone with info that recovers them will get $400 no questions asked.
      Thanks
      The post Suzuki LT 80 Quad And Honda Dirt Bike appeared first on STOLEN 911.
      View the full article
    • By JacobSlabach
      So yesterday I picked up a 07 polaris sportsman 800efi stealth edition for 3k.  Will lead a pic ltr.  In good shape.  Here's what's wrong with it:
      The rpm needle doesn't work just like my other sportsman... not too worried ab that.
      The motor doesn't sound like it's running quite right and doesn't feel like it has much more power than my 500.  I'm thinking it needs a tune up and some fresh oil..  but also it feels like it's running rich.  It's a little buggy when you goose the throttle and sometimes farts when you let off (like I little backfire out the exhuast). I'm gonna check timing and valave clearence on the motor first but thinking of putting a tuner on it? Anybody got a suggestion?  Mainly looking for more power.
    • By derick geisendorfer
      I found a black rubber hose hanging down from the front of my Sportsman 850.  I'm trying to see if it's the diff vent hose, or something else and if it's something else, what it's supposed to attach to...  
  • Similar Tagged Content

    • By Dave Ayoub
      Ok i am not quick to jump on a forum and post a question without doing my own part and trying to research and solve the problem myself but I cannot find any definitive information anywhere about my problem. I have a Big Bear 350 that I picked up very cheap which had been sitting in a field for years. I am not new to building wheelers but this one has me beat. After rebuilding top end and replacing the carb it fires right up. The vin has some number worn off from being next to the shifter but from the parts in the clutch i assume it is early since 87 parts seem to be the only ones that match. Thats when the plot thickened. 
      Reverse works fine but when in the forward gears it would not go past 1st and was hard to get into neutral. ie. a it took a million clicks up to thump into 1 and as many down to find neutral. still never getting past 1st. within minutes i could hear metal screeching and whirling around in the clutch side of the motor. I took the cover off to find that 3 out of the 4 springs on the centrifugal clutch had broken and were shredded. Also the black mechanism that the pawl on shift shaft grabs moves was loose so it wasnt always grab to change the gear on the transmission. I tightened that mech, and replaced the springs assuming it would solve the problem since the gears were not actually changing from the lever and the carrier should obviously not only have 1 spring left. 
      After putting everything back together it did go into 1st fairly easy but then i again couldnt get it back to N without a million clicks down and couldnt get it to go past 1st. I did one time get it into a higher gear who knows what one but i gained some speed and dropped rpm.
      If i jack both the front and the back wheels off the ground and run the motor it becomes much easier to shift and i can get it to run through the gears pretty well. Usually going into N without a huge fight. not perfect but it does hit neutral and roar while spinning the wheels instead of gain rpm and with the power. 
      I have tried every possible position on the clutch adjustment screw without any noticeable result. I think this could potentially be where my problem lies at this point.
      does anyone know if the case is supposed to be threaded? because mine is not. obviously it seems as though it should be since every other bike ive touched has been. i even took the cover off my quadrunner to make sure it wasnt crazy.
      when the screw is adjusted and the jam nut tightened the screw will just slide back out since there is no threading in the case. accomplishing nothing. 
       
      Does anyone have any insight on any of this? Are my plates stuck, Centrif clutch worn out, case stripped or something else crazy im over looking? 
       


    • By Wolf Studios
      Hi guys so I'm looking for any help or advice with a yamaha big bear 350 1997 (i think) it's fairly dirty and just been say for many years, boss says it's a non runner and I've tried and it will not start, ideally would love to do it up and get it running but have been told the engine has gone, cannot find a new engine anywhere. Anything I should check first before just taking the entire thing apart? 

    • By MarkinAR
      Working on my oldest son's buddy's 2000 Big Bear.  He was having some power loss at WOT so i thought it worth while to clean the carb and put at kit in it...or at least clean the OEM jets and use the new orings that come in the kit.  It starts and idles like a champ, but dies and wants to backfire with any throttle at all.  I assume lean because it will run decent with the choke on. Air screw adjusted fine, nice crisp idle.  This one has fuel/air screw, low speed jet, mid jet, and main jet.  I was assuming just trash in the low speed circuit so pulled it and cleaned again, still does the same. 
      Two questions I guess:
      1. Does it sound most likely trash in the off idle circuit?  This one has a few more passages and jets than I'm used to...and a darn diaphragm.
      2. It now really wants to leak at the bowl drain screw.  It doesn't seem to tighten enough to completely stop the flow.  Seat looks good, screw was dirty but cleaned up fine with a touch of 2000 grit paper.  First for me.  Any idea here?
    • By Walter Awe
      I HAVE a 2002 big bear 400 4x4. I have two wires atacking to the front of the carb. What are they for?
    • By Shook
      Hi I have a 2000 big bear 400 and i just put a new carburetor on it and it idles fine but when you try to accelerate it sounds like it is going to die, so when it sounds like it is going to die I will give it more throttle then it will go just fine.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...