Low down rattle?
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  1. #1
    Senior Member Wright_stuf's Avatar
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    Low down rattle?

    Gents,

    My CB1R sounds like it has an engine rattle when at low revs (1-2k) like noisy tappets on a car. the noise goes when the engine is revved, any ideas? (the bikes only done 6k and has a full service history).

  2. #2
    Senior Member jampy00's Avatar
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    Have you check all the exhaust shields to ensure nothing is loose, actually check any connection to the engine as the low revs coul dbe causing a vibration from hitting the righ frequency...just a lame guess...

  3. #3
    Super Moderator jon.f's Avatar
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    Got any oil in it.
    One Life. Live it to its full. Black ones are the fast ones

    R I P Simoncelli

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  5. #4
    Senior Member Markcb1000r's Avatar
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    I had a woodpecker type noise on mine it was the righthand rad cowl tapping against the engine

  6. #5
    Senior Member Wright_stuf's Avatar
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    Cheers gents, just had a service Jon.f so full of oil. ill check all bolts etc when i get in but it sounds more engine rattle than something external rattling.

  7. #6
    Junior Member USA-RIDER's Avatar
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    My bike does the same thing only at low rpm. it is definately a valve rattle. In my opinion its octane related. the highest octane available around here outta the pump is 93. i tried some race gas(116 octane) and the noise went away. i can live with the low rpm valve rattle on pump gas, im not gonna spend $16.75/gal to get rid of it.

  8. #7
    Super Moderator sovrec's Avatar
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    ...mine has a bit of a slight tappety sound at almost dead on 3k revs - ok below , fine above - just an engine foible ! Power and drive are fine , no tickover noises, no backlash noises when revving - engines are noisy as they have pistons and rotating valves etc and I think some will just be naturally more noisy than others - if in doubt check the valve clearances etc - the Hornet did the same thing but still going strong !

  9. #8
    Junior Member kartl's Avatar
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    Is the valve of cb1r automatically adjusted or need manual adjustment? Noise may came from that area.

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