Ran my bike with no oil in crankcase? But dipstick says I have oil?

6 replies to this topic
  • tank3d

Posted September 09, 2012 - 03:37 PM


2003 WR450F

Just got the bike back from the Yamaha Dealer. The fixed my jetting issue and installed an adjustable air screw. They told me the bike was basically overflowing with oil, so they drained it and put in fresh oil.

Today I went riding. It started right up. I rode it down to the trail. The exhaust was popping on deceleration. Then the bike died. I tried to restart, it stared and them died. repeat twice. I checked the oil filler cap on the crank case, and there is NO OIL.

When I get the bike home, I double check the crankcase with my flashlight, and yep, it's still empty. I check the Oil Tank Plug (the one in the frame with the dipstick) and it shows fresh oil at a proper level.

I am new to this bike and have not changed the oil before. Can someone explain to me if the bike has the appropriate amount of oil?

Also, if this is an oil issue, how screwed is the engine?



Edited by tank3d, September 09, 2012 - 03:37 PM.

  • Dougie64

Posted September 09, 2012 - 05:46 PM


Perfectly normal, it's what is known as a dry sump, if you're getting oil back into the frame then the oil pump/s (one feed one scavenge) are doing there job.

More info, http://www.thumperta...50f-oil-change/

Edited by Dougie64, September 09, 2012 - 05:54 PM.

  • tank3d

Posted September 09, 2012 - 07:02 PM


Thank you. that makes me feel better. I wonder what the issue was? The Choke lever appears to be bent...it still seams operational. Would that cause any issues?

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  • MANIAC998

Posted September 09, 2012 - 07:25 PM


Possibly. With it being bent, it could be hanging open slightly, causing issues. You've got to get a manual for your machine. This will help tremendously.

  • g17jimmy

Posted September 12, 2012 - 09:19 AM


I have the PDF for the '03. It's ~34MB I'll have to figure out how to get it to you, if you still need it.

Edited by g17jimmy, September 12, 2012 - 09:52 AM.

  • g17jimmy

Posted September 12, 2012 - 08:26 PM


Nevermind- I found it here (from the FAQ) -- http://bit.ly/OIlKJU (the url from the site kept getting truncated so I put it in bit.ly)

Edited by g17jimmy, September 12, 2012 - 08:28 PM.

  • e36graduate

Posted September 15, 2012 - 06:07 AM


you probably played with the adjustable air screw (i probably would too) and now the air/fuel ratio is not correct for your altitude and temperature........you messed with it didn't you!!!!


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