Cam Chain Tensioner Problems - Anyone Else?

Discussion in '2012+ CRF250L Tech Talk' started by Logan Kemp, Nov 15, 2017.

  1. Logan Kemp

    Logan Kemp New Member

    Joined:
    Jan 10, 2017
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    Location:
    Yangon, Myanmar
    Motorcycles:
    Honda CRF 250L
    First Name:
    Logan
    Has anyone encountered an issue with the cam chain (timing chain?) tensioner failing?

    One of my CRF's has a knocking/rattling noise coming from the engine. Rather subtle, but noticeable enough to bug me. Online searches indicate it is the tensioner that has failed, and that it's a rather common issue.

    Anyone else have this? How did you resolve it?

    See video.
     
    Singlespeed92 likes this.
  2. superfunkomatic

    superfunkomatic Member

    Joined:
    Jul 9, 2016
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    Motorcycles:
    CRF1000L Africa Twin, CRF250L, XL1000V
    First Name:
    Mike
    I had to replace them on another Honda bike at 50,000 kilometres. They are not considered defective and are a wear-and-tear item on the bike. I think replacing two on the other bike was about $200 CDN, so is likely cheaper on our CRFs.
     
  3. Schnatterinchen

    Schnatterinchen Member

    Joined:
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    Location:
    Wedemark, Germany
    Motorcycles:
    CRF250L - CB500S - Hornet 600 + 900
    First Name:
    Michael
    I observed a similar rattle on my low-mileage CRF250L which had done only 600 mls.
    As the tensioner is about EUR 110 in Germany, I bought one in the UK for only 28 EUR including tax and shipping.
    Unfortunately it hasn't arrived yet so I can't tell wether it solved the issue or not.
    The price in Thailand is 402 BHT (10,80 €) by the way... :eek:
     
  4. Thai Guy

    Thai Guy New Member

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    Location:
    Pathum Thani, Thailand
    Motorcycles:
    '96 Yamaha TRX 850, 1984 Honda Gyro, 2014 Yamaha 125 MX Mio, 2015 Honda CRF 250M
    First Name:
    Jay
    My experiences, with every 4 stroke motorcycle ever built that has a spring tension cam chain devise, is that they are all junk. Not designed for the abuse they get. Abuse meaning the every day rpm loading, unloading variation. I have seen failures on every type of bike. When we buy any bike, we change it as a matter of duty, for a manually adjusted one and check it like it is underwear. A properly adjusted chain will last a long time.
     

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  5. Schnatterinchen

    Schnatterinchen Member

    Joined:
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    Location:
    Wedemark, Germany
    Motorcycles:
    CRF250L - CB500S - Hornet 600 + 900
    First Name:
    Michael
    I do not have many issues with the tensioners. I rode three CRFs by now (starting with 164, 952 and 3800 kms) and they all sound similar. I swapped one of the tensioners (as written above) with no effort at all, so I don't think that the rattling is caused by that part.
    By the way, I rode some XL185S in the past and they are equipped with manual tensioners. There are some guys around which destroyed their engines while ignoring the need for adjustment. So I would call the automatic tensioner an advantage :)