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Message: [QUOTE="Moparman1539, post: 1293703, member: 72242"] Ok, so i shortened this a lot to the one main problem that i have that am trying to figure out. But the problem is for my 1983 Kawasaki KX250, the plug looks fine, i run Kawasaki racing 2-cycle oil. But i only use 86 octane because i have no money and it was just to ride it for today. I have no idea what it is, or where its coming from. But at mid rpm's there is a rattle(like a fast rattle grinding noise..), idling it sounds perfect. I don't know where the sound is coming from but its like the general front area of the motor (i think...). At first it sounded like the exhaust was hitting something. But its not... I'm not sure what it is or where its coming from, it wasn't making the noise when i put it away. so it has me stumped, ill most likely tear into it when my dad gets home(in a week), but till then i would like to see if anyone has any ideas. Anyway i uploaded a video. You can clearly hear the noise when i rev it up. Its really loud, and bothers me. <embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://s161.photobucket.com/flash/player.swf?file=http://vid161.photobucket.com/albums/t203/DaShrub/Videos/DSC_0003.flv"></embed> Thanks for the help! [/QUOTE]