Rattling in mid range

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Rattling in mid range

This is a discussion on Rattling in mid range within the ZR-7 Maintenance forums, part of the Kawasaki ZR-7 category; Hi I'm getting a bit of a rattle in the engine when I'm in around 4000rpm to 5000rpm. It seems to happen in all gears ...

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    Newbie skoobi's Avatar
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    Rattling in mid range

    Hi I'm getting a bit of a rattle in the engine when I'm in around 4000rpm to 5000rpm. It seems to happen in all gears as far as I can tell... I've recently changed the spark plugs for iridium NGK, piper cross air filter and oil filter with new oil but it's still there. Anyone had this before at all...

    Also do I need to rejet the carbs if I've changed the air filter to a piper cross???

    Cheers
    Chris

  2. #2
    Johnny Blue Lightnin'
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    How many miles on the bike? Did it start after replacing the air filter? You could be running a bit lean. ZR's aren't know to ping but it is possible. Try some higher octane gas and see if it stops.
    Jon

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    Supreme Being HilbillyKat's Avatar
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    How long's it been since the valves were adjusted?

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    Supreme Being Doug Hyde's Avatar
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    I always start with the easiest and cheapest solutions, so before anything else I'd confirm that the exhaust collars weren't loose, particularly as you mentioned a "rattle."
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    Supreme Being sh0rtlife's Avatar
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    Quote Originally Posted by Doug Hyde View Post
    I always start with the easiest and cheapest solutions, so before anything else I'd confirm that the exhaust collars weren't loose, particularly as you mentioned a "rattle."
    id second that..mine liked to work loose every 500 miles or so..till i got mad and double nutted them

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    Newbie skoobi's Avatar
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    Cheers guys only today i've managed to got time to check it ill let you know what i find...

    Its done a fair bit of milage (46,000 miles)...

    Ill try a few things today and see what it does

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    Obo
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    Are you sure it's an engine rattle and not a rattle of either the fairing or the tail light assembly (or something else)?
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    Newbie skoobi's Avatar
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    Quote Originally Posted by Obo View Post
    Are you sure it's an engine rattle and not a rattle of either the fairing or the tail light assembly (or something else)?
    Ye its definitely engine. I've put rubber washers on the fairings. Ive booked it in for the carbs to be re-balanced next week so hopefully they can take a look while its there...

  10. #9
    Newbie cosmix's Avatar
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    Hi

    I am new here.
    I have a very similar problem. My engine emits a knocking sound only in the mid-range. Does anyone know what was the cause in this case?

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    Up-And Comer CB_Phil's Avatar
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    Not sure about the rattle, but the knocking could be fuelling issues. How is the power during the knocking?

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    Newbie cosmix's Avatar
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    The bike runs smooth, whithout any problems except the rattle between 3000-5000rpm.

  13. #12
    Up-And Comer CB_Phil's Avatar
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    I'd still look at fuelling 1st. Check plugs & air filter, then move onto carb balancing & tappets. Even if they aren't the cause, they are still good to do.

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    Newbie cosmix's Avatar
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    All this is already checked, even the valve clearance. Sounds appear up to 3000rpm. There is nothing to hear before reaching 3000rpm.
    Attached Images Attached Images

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    Up-And Comer CB_Phil's Avatar
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    Plugs look good. Check the camchain h tensioner?

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    Newbie cosmix's Avatar
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    When setting the valve clearance I am also checked the tensioner. Looks OK.

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