Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums - View Single Post - Help needed
Thread: Help needed
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post #2 of (permalink) Old 04-14-2019, 03:42 PM
Senior Member
Join Date: Mar 2019
Posts: 138
Most likely metallic “dust” from your clutch plates.

Check oil filter for larger “chunks”
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