Question about 2004 Yamaha WR 450 F

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Oil build up in the frame. When you warm it up & check the oil. Oil comes out the frame.

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It may have too much oil in it, you are supposed to check level after running the bike for a few minutes.
If you top it up by the dip stick level before running it, you will overfill it.
There is a drain in the frame down tube as well as the engine drain bolts and filter.
Fully drained will take 1.1 litres

Posted on May 16, 2010

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6ya6ya
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Posted on Jan 02, 2017

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Hi, here you go:

Oil capacity is the same as the 250.
1.5 ltrs at oil & filter/s change.
700mls to 1ltr without filter change.
This bike has what is called a dry sump. You fill your oil at the filler point that is located in front of the fuel tank on the frame. It uses the front frame tube as a container for the oil & pumps it back & forth to the motor. This bike has two oil filters.A cartridge type one located behind the small round cover held in place with two bolts that is located on the clutch cover.The other filter is a screen attatched to the spiggot which the hose from the frame(front bottom) slides over. Remove the hose(frame front bottom), undo the spiggot that the hose was attatched to,and as you pull it down to remove it you will see the fine wire screen that is attatched to it.
When you remove the oil filler plug(in front of the fuel tank)you'll notice it has a dipstick on it. When you fill the tank the oil level will seem high. Run the bike first(to let the oil circulate) then check the level on the dipstick. It will now be much lower. adjust the level to the correct level & away you go!
I recomend changing the the cartridge oil filter & cleaning the screen every time you change the oil. Use a high quality oil like Motul & change the oil regularly.
Also keep your air filter clean & oiled properly.


Good luck!!
EJ Kudelka

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1 Answer

Check oil level


Standard 'oil in frame' inspection is to make sure (through the engine sight glass that there is oil) start it, let it warm up, leave it for 7-10 mins and check the level of the glass. oil should be visible and ideally not more than 1/2 way up the window.
hope this helps.

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1 Answer

Oil capacity for motor on 2001 yz426


Oil capacity is the same as the 250.
1.5 ltrs at oil & filter/s change.
700mls to 1ltr without filter change.
This bike has what is called a dry sump. You fill your oil at the filler point that is located in front of the fuel tank on the frame. It uses the front frame tube as a container for the oil & pumps it back & forth to the motor. This bike has two oil filters.A cartridge type one located behind the small round cover held in place with two bolts that is located on the clutch cover.The other filter is a screen attatched to the spiggot which the hose from the frame(front bottom) slides over. Remove the hose(frame front bottom), undo the spiggot that the hose was attatched to,and as you pull it down to remove it you will see the fine wire screen that is attatched to it.
When you remove the oil filler plug(in front of the fuel tank)you'll notice it has a dipstick on it. When you fill the tank the oil level will seem high. Run the bike first(to let the oil circulate) then check the level on the dipstick. It will now be much lower. adjust the level to the correct level & away you go!
I recomend changing the the cartridge oil filter & cleaning the screen every time you change the oil. Use a high quality oil like Motul & change the oil regularly.
Also keep your air filter clean & oiled properly.
Hope htis helps
Regards Andrew Porrelli

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1 Answer

Flickering oil lights


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