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  1. #1

    300x piston cracked

    Looks guys!
    300x stock engine 30 hours. It was long drive about 80 kilometers.
    But I know more 3 owners 300x which have same problem crack piston in first cylinder 7 hours in 5 minuts after start engine, 20 hours crack piston with hole and 30 hours crack piston with hole.

    What do you think guys pistons quality? or?
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  2. #2
    Banned User
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    Did run the ski out of oil. That piston is not cracked it is melted also the other pistons appear to have rust on them. Did u mess with the timing ? Have you tuned the ecu. ? Did u check the pump ?

  3. #3
    I check oil level before this race it was ok.

  4. #4

  5. #5
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    oh my lord, damn it look like if it were running lean

  6. #6
    gp1200rider's Avatar
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    terrible ski is stock ? looks like that cyl was Over heating , and you rode it for a while after it nuked causing the extra melt down,can you re sleave it and rebuild ?

  7. #7
    It was offshore and I felt nothing on rough water until engine start working as a limp mode than I stop it.
    I will rebuild engine with new block.

  8. #8
    Banned User
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    how much is a new block?

  9. #9

  10. #10

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    looks like detonation damage, bad fuel and or a bad knock sensor?

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