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  1. #1

    stxr dead piston ( lean ) now time to rebuild. need guidance

    so my front piston die because of a lean condition. i was going at 61 mph for a good 20 to 30 sec when it suddenly show down on me. got back to shore to realize i had no more compression on first cylinder. after opening the engine i saw the fired piston and came out with the fact that i was lean from somewhere.
    carb are stock and have the stock jetting. so i think its probably the oil line or maybe the reed that cause the piston to die.

    so im about to pull the engine out. but i was wondering:

    Should i open the crank case to be sure there is no metal chip from the piston?
    is there any way to see if if the crank is still good?

    Thanks
    E.t.
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  2. #2

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    Definitely will need to inspect the casing for debris that got down in there. Which cylinder is that?

    *** Never mind, i see that its the front cylinder
    Last edited by Spades; 12-23-2016 at 03:04 PM.

  3. #3
    Deff a lean condition, is there any damage to the case? I would split them good chance it nrrds a crank rebuild

  4. #4
    steve45's Avatar
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    Sorry to hear that! Definitely open it up and do it right! Got a manual? You NEED one! I'd highly recommend genuine Kawasaki pistons. Replace the oil lines with polyurethane hose and do NOT get them mixed up! Don't forget to add oil to balance shaft bearings when you put it back together.

  5. #5
    case is still in good condition. i would splt to see if everything is good. i found a crank master not to far from my house. he will look at my crank once it will be out of the crankcase. i already have a spare cylinder with eom piston on the shelve. so i will use those. i was planning on using oem crank seal but i was wondering if all other gasket need to be oem?
    i dont have the manual right now but i plan on buying it.
    i have to look at everything because i plan on running the triple pipe on it.
    steve45 can you point me a direction to buy those new oil line?
    do the oil pump can be rebuild like carb ?

    thanks you all for your anwser
    E.t.

  6. #6
    steve45's Avatar
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    You can buy 1/8" ID polyurethane hose on Ebay. The oil pump is not serviceable. They virtually never fail, but you can check it by putting it in a vise and spinning it with an electric drill. (It spins CCW, use a piece of rubber hose as a flexible coupling between the drill and pump).

  7. #7
    what other sizes off oil line is there Steve

    are they all the same i.d.

  8. #8
    steve45's Avatar
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    The supply line between the tank and the pump is 1/4" ID. You can also use 7/64" ID on the pump outlets, it fits tight and you definitely can't re-use the original clamps. I use .025" stainless steel safety wire to secure my oil lines. 2 wraps around the hose, then twist the ends until the wire is snug on the hose. Cut the excess wire and bend the end over so you don't stab yourself on it.

  9. #9
    that's great, thanks for sharing the info. i will get all that stock on my rebuild

  10. #10

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    Next time around i will be going with 7/64 for the oil lines. Not sure if its brand dependent but the 1/8 tygon i got fits a bit loose and slides on a little too easy for me

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