Leaking Oil

7 replies to this topic
  • G-Man

Posted February 16, 2002 - 08:46 PM


Since my lower end rebuild I have noticed some oil coming from my ignition cover. I did not pull the crank from that side so I don't think it's the crank bearing. I did not replace the cover gasket so I hope that's all it is.

I guess some oil is normal BEHIND the cover which I dscovered when I tore it apart. It seemed really odd to me, but I am told that that it is normal to have seepage BEHIND the cover.

Have not pulled it apart yet so just wondering if this has happened to anyone else.



  • G-Man

Posted February 18, 2002 - 05:43 PM


TtT=To the Top

  • Weezer_#_1

Posted February 18, 2002 - 08:25 PM


G-man.....I just got my '01 426 a few weeks ago. I was riding it the other day and noticed some oil under my ignition cover. Not sure if it is coming from that or the blow over tube but I am going to keep an eye on it.
Let me know if you find out anything.

  • Guest_Guest_*

Posted February 18, 2002 - 08:46 PM


I have a 99' and I have developed a very slow leak on the right side of the case. Not the filter cover nor the clutch cover but I think it is the right side case.........any Ideas on how much of a pain in the A$$ it would be to chang the gasket or should I leave it alone?
very slow....rather seap.......
just enuf to collect dust on the skid plate... :)

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • MX_Tuner

Posted February 19, 2002 - 07:42 AM


Gary, everything under the ignition cover is bathed in oil, not merely a littel seepage. This is by design. Put a new gasket on it and you'll be fine.

Rock Hucker, teh right side cover gasket isn't too hard to change but is a bit time consuming. Be careful to grab every o-ring before it falls into a black hole. Most every passage is sealed with an o-ring (coolant, oil, peanut butter, etc.).

  • G-Man

Posted February 19, 2002 - 06:15 PM


Thanks Tuner,
You da man!

  • F-Pilot

Posted February 19, 2002 - 06:23 PM


Also check the timing plugs and their o-rings. Mine came loose on a ride and made a mess of my boot.
Still no bike yet, looks to be next week now. :)

  • RacerX

Posted February 20, 2002 - 05:24 AM


G, you finally fixed that loose nut above the cylinder head - now there is another loose nut on your bike - Yikes!

BTW, how's the new gig???

Related Content


yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.