Blue smoke is oil, black smoke is fuel. I would go right to the butterfly valves in the top of the heads. If the butterfly valves are not working properly you will get more oil then normal flowing into the intake. The butterfly valves are a part of the crankcase breather system.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.