Posted August 19, 200915 yr Hi Just bought an SZR 660 cheap, and its knocks loudly on tick over at the top end, however rev it over 2000 rpm the knocking disappears. But it gets louder if you blip the throttle until the revs pick up above that point. It seems to run ok despite this and its not burning oil. Any thoughts please? Over to you experts! Cheers Budgie
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