need help quick


1 reply to this topic
  • cheeseclip

Posted August 11, 2009 - 07:25 PM

#1

ok well i just gave my 03yzf450 a service and wash etc. it starts fine but the oil isnt showing up on the dipstick, i let it warm up etc, when ive done oil changes in the past it has never done this. whats happening?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted August 11, 2009 - 10:43 PM

#2

So, you poured oil in the filler port on the left side? Check to see if the level has dropped at all, as it should if it were being pumped back to the tank normally. If it has, check the oil pressure. It may be a matter of just not enough oil.

If you have no oil pressure, you can try filling the tank directly through the dipstick port, then see if the pressure returns and teh level drops.

What I have seen happen is the drive pin for the scavenging pump rotor will shear, leaving the feed pump operational. This has the effect of draining the tank into the sump because there is no scavenging pump to return the oil to the tank, and could account for what you are seeing.





Related Content

Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

YZ450FX OR YZ450F by MESSMAKER


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies
Forums
Photo

BIGBORE FOR YZ450F 2006? by Taattie94


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
 
x

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.