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07 crf 450r bad noise

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one day i was rideing around at my little track at my house i was in second gear the whole way around not reving much at all. aFTER a few laps i herd a bad noise like a gear in my motor wat picking somthing metal up and throwing it around the. the sound only happen when im moving and hit the gas. i took apart both sides of the motor and there were no damages or mettaL shavings. i even checked my under my valve conver there are no qlues of any thing bad.the motor is very clean. i even looked around wit a tiny camra were my eyes canot see without takein to much apart . please help every thing works fine just mAKES a quick grinding noise i dont think its my chain

any ideas wat it could be?

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i have had hondas loose a toth on a gear and make a simlar noise i would save your self some misery and disasemble the entire engine it souds like its ready to be reconditioned.

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The kickstart idle gear will squeal if the tranny oil level is too low. Drain the oil and put 700cc of fresh oil in it.

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if a tooth boke there should be somthin i woulda saw i looked every where with a scope. (i forget the corect name)(biroscope?) i saw no scratches or anything. the sound sounds like its from the gearbox but everything is perfectly clean i dont know what to do. and i dont want to rip everything apart and repalce stuff if thats not the problem any clue wat else it can be

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Never assume the worst. Before you rip anything apart, drain the oil, refill with 700cc of fresh oil and then test it.

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i already did that trust me it is not a good noise it sound like a bold hitting a gear. now that i looked and listend a little closer it kind of sounds like its coming from the water pump. or somewhere in the bottom end in the front of the bottom end

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i riped the hole side cover off and still every thing is good but my clucht pllates have a little ply like

>

o

<

thats they way the play is and i kinda feel a tiny paly in the hole cluchbasket is this ok or can that be the bad grinding noise the plates seem to have a good amount of time on them

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