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engine noise/clutch noise 2001 yz426f

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I just recently purchased a 2001 yz426f and when I got it the clutch was completely destroyed by the person before me they were missing a friction plate and had 2 steel plates stacked on each other. But the motor sounded good and kicks first kick after a new plug. I installed a new clutch and changed the oil to find the filter and screen completely full of metal shavings assumed they were from the clutch I rode the bike about 2 hours and changed the oil again today I flushed everything out and filled it with 10w-40 conventional. After changing the oil and flushing it I rode it around for 20 minutes or so and began hearing a louder than normal rattling from the engine I have been reading a bunch to find the problem but any suggestions would be great

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