Just put a Mikuni HSR 42 on my 98 Evo (Fatboy). Also put on a new set of Vance Big Radius 2 into 1. I had to reverse the breather (one piece chrome tubing) to fit with the Mikuni. When I fire it up in the garage it runs great, but I have some smoke coming off the front rocker box. I let it warm up so it burned anything off I had on the motor. Its not exhaust from the from the front cylinder. Breather problem? Ideas? I also tend to wonder if going from my big shots without baffles to a 2 into 1 system with a baffle if the backpressure is bringing a bad or loose gasket to light. I had a bleed down test about a year and one half ago without any problems.