Jumped timing bored and stroked.
  • brappdaddy290x
    Posts: 2
    Joined: Thu Mar 30, 2017 8:46 am

    Jumped timing bored and stroked.

    by brappdaddy290x » Thu Mar 30, 2017 8:57 am

    Hey everyone I have a 06 CRF250x. Recently rebuilt. I am running an Athena 280cc kit with high comp piston, hotrods stroker +2mm and hot cam stage 1 cam. Included in the build was new timing chain and auto tensioner both oem. My problem is on the weekend my two intake valves came in contact with my piston. No damage to either. I heard it and shut the bike down instantly. Valves are not bent or damaged and the piston is ok. You can visibly see where the valves and pisyon met each other lightly. Enough to remove the carbon. My friend is a honda tech and has helped me along the way with my build. I am assuming the load on the cam chain over loaded the tensioner allowing the cam chain to jump a tooth. Does any one else run the athena big bore, hot rods stroker and hot cam stage one set up. Has any one experienced this issue before? I have roughly 40 hours tops on the motor since complete rebuild. Everything was flawless and great!! Thanks to everyone whom reads this post and or replies to it.
  • User avatar
    crfsonly
    Owner
    Posts: 9651
    Joined: Thu Apr 01, 2004 3:45 pm

    Re: Jumped timing bored and stroked.

    by crfsonly » Wed Apr 05, 2017 12:43 pm

    Welcome to the site! Have you resolved this issue? Have you called Hot Rods about this?

    Ken
    OEM Parts for Honda - Yamaha - Suzuki - Kawasaki: http://yeltrik.com
    _________________
    CRF Parts and Accessories: http://crfsonly.com
  • brappdaddy290x
    Posts: 2
    Joined: Thu Mar 30, 2017 8:46 am

    Re: Jumped timing bored and stroked.

    by brappdaddy290x » Wed Apr 05, 2017 1:38 pm

    I have not contacted them. Im assuming my new oem tensioner failed or was over loaded. Ordering a manual tensioner. Its a tough subject to find information on!
  • User avatar
    crfsonly
    Owner
    Posts: 9651
    Joined: Thu Apr 01, 2004 3:45 pm

    Re: Jumped timing bored and stroked.

    by crfsonly » Wed Apr 05, 2017 1:44 pm

    We offer manual cam chain tensioners. As for your issue, I recommend you call Hot Rods as they should be involved.

    Ken
    OEM Parts for Honda - Yamaha - Suzuki - Kawasaki: http://yeltrik.com
    _________________
    CRF Parts and Accessories: http://crfsonly.com

Who is online

Users browsing this forum: No registered users and 5 guests