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Thread: Valve Adjustment

  1. 09-29-2001, 12:44 PM #1
    trueblue450's Avatar
    trueblue450
    trueblue450 is offline Rubbin's Racing
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    Valve Adjustment

    Now I know its in the EXTECH section, but I have a 300EX. I was wondering if anyone who had done it can tell me how to. I have no clue how to do this, but I heard it isn't that hard. What tools do I need, and would it be accomplishable for me seeing that I am alittle mechanically challenged.

    thanks
    - #48 2004 BLUE YFZ 450 -
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  2. 10-10-2001, 07:50 PM #2
    trx400ex
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    they are simalar, you will def need sockets wrenches and feeler gauges
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  3. 10-10-2001, 08:12 PM #3
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    Atomic83
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    There was a question on this a few weeks ago. Search the threads and see if you can find anything. I think it is pretty much the same as the 400ex except for the size of gages.
    2002 Yellow 400ex

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    Renthal 14 tooth, LSR e-brake block off, Speed EZ Pull Clutch Lever, Pro Design kill switch, Renthal Handle Bars, Trail Tech Speedometer, AC Pro Pegs and Bumper, Houser +2 A-Arms, Elka Tripple Rates w/ rezzies, Elka shock covers, Razr MX's front and back, douglas ultimate beadlocks, Fastline Breaklines, Lonestar Axle.

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  4. 10-11-2001, 01:52 PM #4
    barbwire44
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    Ok i'll tell you the best way to do this remove youre tank put youre bike in a real open spot in youre garage grab a twenty pound sledge stand on the rear grab bar and aim for the top portion of the cylinder and start swinging then simply remove the motor mounts and install a 400ex motor and she will run 100% better.
    Previously owned bikes:81-yz80,82-ty80, 85-tri moto 200, 84-rm125, 85 xr200, 84 rm500, 87 rm125, 83 honda big red, 88-250r, 89-250 quadracer, 90- 500 quadzilla,86 cr500, 91-250 quadracer, 86 tri-z, 89 xt600, 94 fzr600, 95 timberwolf, 93-banshee, 88- 265R, 01-250ex(wifes). 2001 400ex, 440 kit, 03 ds650, 00 big bear 4X4, 01,xr200r, 1995 wr250z, 2002 yz250 2smoker, 2002 husky wr360, 2004 400ex
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  5. 10-11-2001, 10:45 PM #5
    trx400ex
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    i tried that, and now i need a new engine. , how could you, i trusted you man
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  6. 10-12-2001, 05:56 AM #6
    barbwire44
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    Talking

    trust me you'll thank me later.
    Previously owned bikes:81-yz80,82-ty80, 85-tri moto 200, 84-rm125, 85 xr200, 84 rm500, 87 rm125, 83 honda big red, 88-250r, 89-250 quadracer, 90- 500 quadzilla,86 cr500, 91-250 quadracer, 86 tri-z, 89 xt600, 94 fzr600, 95 timberwolf, 93-banshee, 88- 265R, 01-250ex(wifes). 2001 400ex, 440 kit, 03 ds650, 00 big bear 4X4, 01,xr200r, 1995 wr250z, 2002 yz250 2smoker, 2002 husky wr360, 2004 400ex
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  7. 10-31-2001, 03:36 PM #7
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    Just a quick question, until my shop manual arrives. Is the 400ex procedure close to the same for the new 250ex?

    Thanks,

    John


    2001 400ex (mine)
    2001 250ex (son's)
    2001 Warrior (wife's)

    All stock
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  8. 09-26-2002, 08:54 PM #8
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    toby400ex
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    i wouldnt think considering the 250ex has pushrod actuated valves
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  9. 09-27-2002, 04:59 AM #9
    Ben
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    Yep - your going to need a different procedure for the 250ex. The 300ex procedure is the same but the valve clearance specs are different than the 400ex specs.
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  10. 09-30-2002, 11:44 AM #10
    SR71
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    The 250EX valve adjustment is very similar to the 400 procedure. If you follow the instructions to the 400, you will be just fine. The steps that aren't necessary on the 250 will be obvious. Major differences are that the 250 only has two valves to check, and access is much easier than on the 400.
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