Excess oil 05' YZ450F

Yesterday after riding a moto, I checked the oil. I had just done an oil change before riding, and when I opened the dipstick oil came gushing out. I thought something must be plugged in the system, so I pulled the oil filter to make sure it is in right, it was (can't go in the wrong way). I pulled the oil screen and it is clean. After I went home I drained all of the oil and refilled with 1000cc and everything is normal. When I change the oil I only pull the plugs on the bottom end, not the frame as it never has any oil left in it when cold. I think there must have been oil in the frame from when I changed it and then over filled when I serviced it.

I know the error of my ways now (warm up the bike and drain the frame also), but I just want to see if anyone has any other ideas about why the frame would have some much oil in it. The bike ran perfectly the entire time, and didn't belch any smoke or do anything abnormal.

Sorry about the lengthy description. Any other ideas?

. well ive never personally had that problem..

my method is this

warm up bike. ride around the block or let idle for a bit . . .

drain the frame first. (billy who man funnel) helps a LOT. you should get one there less than 20 bucks. they also make a really killer oil change bottle thats labeled for oil changes with and without filter . so you can never get the wrong amount of oil in your bike. and dont have to keep messing with the dip stick.

then drain the cases. ( i change oil filter every other oil change)

then refill wiht proper amount of oil.

replace oil filler cap. and start the bike. let run for a bit. not too short of of a time . dont want to foul your plug.. then check the oil level with the dipstick.

should be fine.

check out the bottles and funnels here . http://billywho.com

If you were doingyour oil changes according to the manual (run the engine before changing), almost all the oil would be in the frame. That's where it belongs in operation, and only when it sits for an extended period does it all leak past the oil pump and back to the cases. In your case, the period wasn't extended quite enough, that's all.

Since it's a dry sump system, the extra oil won't change anything about how the engine runs until there's too much total oil to fit in the tank. It will then be forced back through the vent line to the cam box, and cause oil out the breather, smoking, etc., but no permanent harm.


I appreciate your input; knowledgeable and informed, as usual. Thanks,


Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By faizakhtar125
      Hey guys I just bought a bike last night. So the seller said the bike will turn on but then die. We didn't try it because it was really late at night and it was raining (seat was wet). But he said if you bump start it, it will turn on and ride. So what do you think the problem is? I just want to make sure it runs... I probably won't be able to bump start it till Saturday (rain)... It's a four stroke, and I know absolutely nothing about them. Thanks.
    • By dpenn1
      I could use some feedback, My son is getting into off road riding so I have starting getting back into it as well.  We mostly do trail riding but did some MX track riding last year and he loved it andso did I.  I have a 2003 TTR 225, it's nice that it has an electric start but the suspension is too soft and it doesn't have enough power for my liking.  When I was riding the MX track I was having issues bottoming out on the larger jumps.  I want to change to a more off-road capable bike.   I won't ride it much and don't want to spend a lot of money, I think I prefer a 2 stroke, when I was younger, in 1990, I raced an 89 RM250 and loved it.  I am looking at a 96 RMX 250  and a 98 YZ400F, both bikes look to be in good condition and around a thousand dollars.  I like the RMX because I think kicking a 2 stroke 250 should be easier than a 4 stroke 400 and the simplicity of the 2 stroke engine.  The 400 sounds good because of the low end torque I assume it has but the cost of rebuilding the 4 stroke if needed worries me and I have heard they are hard to start. Should the RMX be decent for an occasional trip to an MX park?  Any thoughts on these two bikes? 
    • By yz480doinwork
      Brand new, still in the packaging Lexx end cap fits the stock muffler of 2006 & 2007 YZ450f and 06-13 YZ250f. Comes with a forest service approved spark arrestor and two different size tips. Don't spend hundreds of dollars on a slip on, this tip can be quiet and forest legal or loud and make power! Also a note for WR450 guys: get this tip and find a used 06/07 YZ muffler, fits directly on 09-15 WR450. $80 shipped free to the lower 48. PM, call or text 406-223-8789
    • By Woody Oakson
      So I have a 2008 yz450f and I would like to add some LED lights to it to make it street legal. Mainly just a headlight and a tail light and turn signals if I need to (which where I live hand signals work).
      So where I need help is getting power from the stator to a battery. Wiring from a battery to anything else I got and understand and don't need help with (but recommendations are welcome). So my questions are.
      What type of power is coming from the stator. AC or DC? Will I need a regulator or rectifier? How do I wire something from the stator to charge a battery? What would that wiring look like? Would this stator http://www.rickystator.com/product/stators/yamaha/yamaha-yz450f-35-watt-lighting-stator-assembly-06-09 work? Anything else I should know? Any help would be appreciated. Thank you.