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Noisy CB500 twin

  • 23-07-2010 2:15pm
    #1
    rock22
    Registered Users, Registered Users 2 Posts: 1,724 ✭✭✭


    I have a CB500 twin. 50,000 miles, which has developed a rattle in the lower right side of the engine. To me it sounds similar to tappets ( but obviously in the wrong place!).
    It was suggested to me that it could be the primary chain. Except the Cb500 does not have a primary chain. However its oil pump is chain driven and is in the right place.
    I just wonder if is a common problem or if there is some other likely cause?
    By the way, the engine oil is exceptionally clean, no evidence of anything breaking up.

    ANy help appreciated.


Comments

  • #2
    Wossack
    Registered Users, Registered Users 2 Posts: 7,044 ✭✭✭Wossack


    cam chain?


  • #3
    furerer
    Closed Accounts Posts: 135 ✭✭furerer


    50k.........that's quite a bit of mileage. Has the engine ever been recond? If not then perhaps now is a good time to strip her down and give an overhaul. If you want to just do a repair whip off the side cover and inspect. If you know nothing about bike engines then dont! take it to a mechanic (bike) or ask one of our fellow bikers from boards to take a look...I'm sure if you give your location someone will be your way and you can take it over to them.
    It is very hard to give you a definate answer as to the problem sound without hearing it and looking at it.....you will get all sorts of answers....bearings, oil pump, big ends, tappets, bla, bla, bla.....you know the score. So let us all know your area.


  • #4
    rock22
    Registered Users, Registered Users 2 Posts: 1,724 ✭✭✭rock22


    Thanks lads.
    I don't think it is the timing chain although that too is a little noisy. However I can't be sure.
    Is 50,000 miles high mileage? I would have thought not but maybe I'm wrong. Anyone else got mileage figures.
    The reason for my post was to see if there was a known common problem which gave these symptoms. I guess there isn't so i will take a look. Howver I need to remove clutch and even then Haynes manual gives no wear indications for the chain so unless it is very stretched i will have no way of knowing if that is the problem

    Thnaks for all replies


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