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Wes Woodin

Exhaust Residue 450

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Question for you experts. I know the residue color depends on how clean the bike burns fuel.(JETTING) When I ran my 06 with VPu4 it left a white residue.:banghead: This past weekend I ran VPu4.2 and it ran great, however it left a black residue. Is it the fuel, Jetting, or no problem?

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