KDX420 Almost Ready to Ride

Discussion in 'Canadian Daves JustKDX' started by dansf100, May 2, 2010.

  1. reepicheep

    reepicheep Pro Champ
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    The other approach is to just get in the habit of turning off the petcock when you aren't riding. Even after 4 carb cleanings, its the only way to keep my son's KX-60 from hosing down the garage...


     
  2. Martin I Henry

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    Sounds to me like the crank seals have failed. A common problem on two strokes when they haven't been used for a while.

    Dave R
     
  3. julien_d

    julien_d Pro Champ
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    I really doubt the crank seals would affect compression to that extent. You really have to do a leak down test for leaking crank seals to become evident. If the cylinder/ring seal was still good, compression would still be testing out OK regardless of leaking crank seals. Looks like you'll be pulling the jug and checking the cylinder, piston, and rings.
     
  4. Cyclerevival

    Cyclerevival Rookie
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    KDX 450 -Two Stroke

    Hello , Just taking the chance and hoping that someone will be able to give me advice.
    Cant seem to find the correct crankseal for a KDX 450 1980 model .
    Triple lip crankseal measurements are 62x38x10.5.
    Everytime order crankseals it is not the same - Any idea why this model would be differrent or who I could contact.Thanks .
     
  5. jaguar

    jaguar Subscriber

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    if the float(s) have a pinhole leak then they get heavy with gasoline and don't work right.
    take them off and feel to see if they are heavy.
    the exception to this is when floats are made of that styrofoam like stuff.
     
  6. Pete Payne

    Pete Payne MX-Tech Suspension Agent
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    I would give K&S seal company a call or email them with the seal size . Most of there seals have the OEM part number and reference the size of the seal .
    It would be worth a try.
     

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