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Thread: Help ..250 Recon engine noise

  1. #1
    Join Date
    Dec 2009
    Location
    illinois
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    Help ..250 Recon engine noise

    I just put a another bottle end on this 2016 250 Recon.. it has a tapping noise and everything looked good and tight on the bottom end. I adjusted the valves and it's definitely not that. It did have wear on the Piston skirt and and the bottom of the cylinder, I only put new rings and Piston pin but did not bore the cylinder and just cleaned up the Piston skirt the best I could.. would this make that tapping sound? https://m.youtube.com/watch?v=_6GynSW-oL0

  2. #2
    Join Date
    Jul 2009
    Location
    South Florida
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    6,737
    Could be piston slap , were you able to inspect the timing and oil pump chains ?
    78 atc 90/180cc Dickson Full Suspension
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    77 atc 90 Dickson Full Suspension
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  3. #3
    Join Date
    Dec 2009
    Location
    illinois
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    1,763
    Quote Originally Posted by shortline10 View Post
    Could be piston slap , were you able to inspect the timing and oil pump chains ?
    Yes , the replacement bottom end had good timing/oil pump chains but I put new ones in anyway. And the crank was good and tight, no play

  4. #4
    Join Date
    Dec 2009
    Location
    illinois
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    thanks shortline10... I'm with you, it must be Piston slap due to worn cylinder/Piston... I just don't think it could be anything else.. I'm about to spend $200 on a brand new cylinder n piston.. I need to be sure before I spend any more on it
    Last edited by honda200x1987; 11-08-2018 at 10:27 PM.

  5. #5
    Join Date
    Jul 2009
    Location
    South Florida
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    6,737
    With that amount of noise I would think it would be obvious when you pull the top end apart and start measuring .
    The auto timing chain tensioners do go bad and they can make the same type of noise but I would pull the top end first .




    Quote Originally Posted by honda200x1987 View Post
    thanks shortline10... I'm with you, it must be Piston slap due to worn cylinder/Piston... I just don't think it could be anything else.. I'm about to spend $200 on a brand new cylinder n piston.. I need to be sure before I spend any more on it
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
    84 KLT 110/123cc Powroll Racer from 80s
    87 atc 125m stock
    84 atc 200x Curtis Sparks
    84 atc 200x Powroll My race bike from 80's
    83 atc70/108cc Powroll blue Xmas Special
    81 atc185s HP-ATC full suspension

    Performance Shop is Open PM me for Service

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  6. #6
    Join Date
    Dec 2009
    Location
    illinois
    --
    1,763
    Fixed it! Runs like brand new! It was Piston slap , I installed a brand new cylinder, Piston and rings. Sounds perfect!

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