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knocking balance shaft

  1. Engine / Airbox / Exhaust / Fuel Delivery
    hi, i have a 99 bird with approx 40,000mls which after some miles of riding knocks on tickover. the bike runs as smooth as, but once warm she sounds not rough, but noisey while ticking over. it is not the clutch or cct, but its a single knock every second or so, so my question is could it be...
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