So the Knuckle runs great - but is smoking when hot and the rear plug is starting to foul up. Was concerned with too much top end oil so restricted it with .080" jet, and cut the oil pressure spring to bring pressure levels down (S&S pump/crankcases). Also running the slower drive gear set. Not the problem though.
FHP heads rear intake valve cover not sealing, front exhaust cover not sealing (so obviously vacuum issues for oil recovery). The holes drilled in the top of the FHP intake covers concern me as well. How can the stock system draw a vacuum on the intake tins with holes drilled in the top? It appears that the intakes seem to be the problem as the intake ports are soaked in oil so I suspect the oil is not evacuating properly, thus overwhelming the seals. Comments????
My set of stock 39 heads have no holes drilled in the tins at all so what is the deal with the FHP design?
Any insights would be greatly appreciated.
And for those who own FHP heads do NOT try and remove the oil fittings installed into the cast valve "tins" - they snap off instantly. They are extremely fragile and appear to be red loctited in. Next question: where do I get a replacement fitting? I have never seen such fittings before.
Thankfully the bike runs and drives like a dream or this setback would be much more painful Crying or Very sad