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Factory oiled air filter
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June 13th, 2019, 02:12 PM
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DannoXYZ
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Name: AKA JacRyann
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MOTY - 2018, MOTM - Nov '17
Black is actually OK, it's the carbon from combustion. I change oil on my race bike every 50-hrs and it turns black within the first day. Sending oil off for UOA will tell you the real specs on your oil such as TBN and other wear-indicators.
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