Quantcast
Jump to content


2001 Yamaha big bear 400 4x4 oil leak

Juju02

By Juju02
in Yamaha ATV Forum

 Share

Recommended Posts

Juju02 Newbie

Juju02

Posted
Posted

Yes I am a noob! But I still require your assistance, I acquired a big bear and noticed the boot in the rear covering the drive shaft was leaking oil.... So I did some research and it looks like it could be the rear main seal or a loose yolk nut. So I took the liberty tearing the back end off the ATV and now what stands infront of me is the yolk nut. Leads me to my first question how do I even stick anything to tighten the thing it's nearly impossible and if it is tight how do I get anything in there to loosen it so I can replace the seal?? Please any help would be much appreciated!

Link to comment
Share on other sites
gears Contributor

gears

Posted
Posted

you have to disassemble that rear U-joint and get it out of the way to take the nut you're referring to off, pull the yolk off the splined shaft coming out the back of the trans and replace that seal (Just did it on my Kodiak 400), then grease the U-joint and put the whole thing back together - something like $15 for that seal (I got mine off ebay - genuine YAMAHA).

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.

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.

×
 Share
Go to topic listing

  • Similar Forum Topics

    • BruceG
      2005 Bruin 350cc Oil pumping into airbox
      By BruceG
      Hi guys. I have a problem where the quad will start and run well for about 5 minutes and then it dies. On inspection the airbox has oil in it (quite a lot). The oil is pumping through the cylinder head breather hose. This problem first happened suddenly. I have since done the top end including, piston, gaskets, rings and valves. I have also done the carb (not that I thought that this was the problem). The compression seems normal. The only thing that I can think of, is that I did not grind the valves well enough. Anyone experienced this? If so, how did you fix it? Any other thoughts?
    • John Sinclair
      1992 yamaha big bear 350 carburator issues
      By John Sinclair
      I WANTED TO UPGRADE THE CARBURATOR ON MY 1992 BIG BEAR 350, SO I ORDERED A NEW CARB FROM EBAY.  ACCORDING TO THE WRITE-UP IT WAS A GOOD FIT FOR BIG BEARS FROM 1988 TO 1996.  WHEN I REMOVED MY ORIGINAL CARB I NOTICED THAT IT WAS DIFFERENT FROM THE NEW CARB MY CARB HAD TWO THROTTLE  CABLES THE NEW CARB ONLY HAD ONE CABLE.  HOW CAN I MAKE THIS CARB WORK ON MY TWO CABLE THROTTLE?  
    • McG75
      1996 Yamaha Timberwolf 4x4 Rear End Width
      By McG75
      1996 4x4 Timberwolf rearend width. Can someone with some knowledge of these machines answer this question for me please. Are all 4x4 timberwolves this narrow in the rearend? These tires are so close the right one actually rubs the muffler.  Thinking about seeing if there are any spacers out there for it. I need at least an inch more clearance. 
      .
       
       
    • Mhatayas
      Oil leak 1985 suzuki 250
      By Mhatayas
      What should I do about this , bad oil leak where the filter cover bolts on . Can I use some gasket maker 

    • hardcastle
      1993 Suzuki King Quad 300 bucks and farts like crazy
      By hardcastle
      My friends KQ 300 starts fine and runs, as soon as you put it in gear and try to accelerate its bucks and farts like crazy, not moving... I cleaned carb and it worked good for 1 day... now back to same problem.... could it be such as a bent valve????

COMMUNITY SECTIONS

ATV FORUMS

QUADCRAZY MEMBERSHIP

Be a part of best online community of ATV riders and join thousands of people who love ATVs! Share your ATV photos, videos, ATV rides, get help with your ATV and more. Not a member?

SIGN UP TODAY

ADVERTISE WITH US

FOLLOW US ON

  • Automotive Webmaster
×
×
  • Create New...