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Message: [QUOTE="weldspipe, post: 1471296, member: 143152"] Hi, bought this 1999 kx250 about 2 months ago. Rode the bike about 5 different times, all rides being around an hour or two maybe more. Typical saturday and sunday riding. Went out to Hollister last weekend and the bike starts making a rattling noise (as listed in this exact video i found [MEDIA=youtube]aJ4NY8zE5k8[/MEDIA] ), at first I thought it was an exhaust leak but got a gnarly header still makes same noise. I have been researching all day and people say its either a spark plug, bad fuel mixture, power valve rattling, or literally nothing at all, saying its just a "kawie" noise. Does anyone have any experience with this rattle? it increases as RPM increases and does it at idle, definitely not the clutch I've held it in and still makes the same noise. Its driving me crazy, just need some help. Thanks!!! Jacob [/QUOTE]