Throw some oil under that chain roller that is over the swingarm pivot , right behind the front sprocket . It's likely running dry and when worn they make one hell of a noise . If a person lubes the chain with one of the waxy type lubes or one that leaves a residue the rollers typically get lubed plus turn slower and don't rattle , but when dry and clean they try to run the same speed as the chain .
I made my own nylon rollers and made them with minimal clearance so when fresh and clean they really screamed . Some chain wax(Maxim chain wax) under it plus with my lubing the chain often it's all quiet .
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'86 XT600/3TB motor,,, '88 XT600, ,,'92 XT600e,,, '08 Husky TE510,,, '05 DRZ463,,, '95 KLX650 ,,,'96 KLX650
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