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Thread: 400ex oil capacity?

  1. #1
    Join Date
    Feb 2008
    Location
    waverly, oh
    Posts
    2

    400ex oil capacity?

    Could someone tell me how much oil the 400ex takes w/ filter change? thanks
    sponsers: motoxxx steel mx twin air factory backing panolin oil

  2. #2
    Join Date
    Oct 2007
    Location
    Pennsylvania
    Posts
    26
    Owners manual for my 06 says aprox. 1.8 qts. I put almost 2 in my last change. I'm pretty sure this is the same for the older style ex's too.
    '06 400ex
    '84 ATC 200X
    '92 RM 125
    '85 Lt250R Quadracer

  3. #3
    Join Date
    Aug 2003
    Location
    So. Calif.
    Posts
    108
    My manual says 2.3 qts total, and tank holds 1.95.

    If you have drained the tank, crankcase, oil cooler (just takes more time), and changed the oil filter, you should fill the tank, start it up for a short time to redistribute the oil, then refill the tank to the proper level. Take it for a short ride, then go back and check the tank level again.
    Desert- 450R
    Trail- 400EX
    Technical Trail- Rancher 420 and 350
    Kids- Two 250EX's and 90
    Dual-Sport Bike- XT225

    Ride Southwest Deserts in the Cool Months, and High Altitude Mountains in the Hot Months!

  4. #4
    Join Date
    Feb 2008
    Location
    waverly, oh
    Posts
    2
    thanks
    i'm working on it for a buddy and don't have a book or nothing on it.
    sponsers: motoxxx steel mx twin air factory backing panolin oil

  5. #5
    Join Date
    Mar 2008
    Posts
    32
    My 400 2007 takes 2 bottles minus 200 (i think its mg). I put a quart and a half first then let it warm up without revving the throttle. If you don't do it right you will definitely have different readings usually low reading (hence you then overfill). Make sure you are draining both ol plugs as well.
    what shall it profit a man if he gains the whole world but loses his own soul? J.C.

  6. #6
    Join Date
    Oct 2007
    Location
    MORENO VALLEY, Calif.
    Posts
    341
    1.8 quarts is how much all years 400ex takes.
    thats if you drain both plugs and change the filter.

    i usually put 2 full quarts in mine, because i run in the hot desert and the more oil the better it stays cool.
    2004 TRX400EX
    K&N airfilter w/ outerwear, K&N power lid w/ outerwear, 170DJ main jet, stock pilot jet, WB e-series pipe, AC nerf bars, PRM grab bar, CSR +6 timing key, 8 paddle Sand Stars on 10" DWT, Polished stock front rims, 13t front sprocket, 450R front shocks

    You can follow me but it's gonna hurt!

  7. #7
    Join Date
    Aug 2003
    Location
    So. Calif.
    Posts
    108
    http://www.atvriders.com/articles/oilchange400ex.html

    Be sure you do not put the oil filter in backward!!! It will toast you engine!

    Also, drain it a long time to give the oil cooler enough time to empty.

    When the quad has sat for a while, the oil will find all kinds of places to hide....and the reading will always be low if you make the mistake of checking a cold engine. I had a freind do this on his wife's and he got it so full, it blew the oil lines right off the tank because all that extra oil had no place to go........
    Desert- 450R
    Trail- 400EX
    Technical Trail- Rancher 420 and 350
    Kids- Two 250EX's and 90
    Dual-Sport Bike- XT225

    Ride Southwest Deserts in the Cool Months, and High Altitude Mountains in the Hot Months!

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