Harley Davidson Evolution Oil Breather

A Sportster breather kit will ensure your engine functions as it should and it.

Harley davidson evolution oil breather. On a evo motor with a horseshoe style tank main feed in back and two fittings up towards the front and a factory oil pump two fittings. Thats the kind of difference a new Harley breather kit can make for the efficiency and performance of your Harley-Davidson air intake fuel systems. The bottom arrows are pointing to the vent that goes to the breather bolts.

8 Aug 12 2019. Harley Sportster Breather Kits Components. Its almost like a whole new engine.

More efficiently by promoting unrestricted breathing. I vote rings and cylinder sealing. Due to EPA regulations since 1985 Harley-Davidson had to move their crankcase breather tube to the air cleaner.

Timed breathing was introduced on the. The design of the oil filter on the shovelhead uses one oil line which feeds the oil back through the filter and into the oil tank. HARLEY engines excluding early engines with total loss oil systems manufactured up until 1999 used some form of timed breathing to scavenge oil from the crankcase and deliver it to the vicinity of the return oil pump so that it could be sent back to the oil tank.

Ive read about this being a problem if they sit but I ride it a few times a week. The crankcase vented air had to be recycled through the engine. Heres a drawing depicts the umbrella valves contained within the middle rocker box.

Black AIR CLEANER breather filter Fit for harley FLHX street glide FLTR road glide FLHX ROAD KING FLHT filters 2008-2016air intakes softail 2016-2017. Change The Oil In A 1340 Evolution The 1340-cc Evolution engine was used by all Harley-Davidson motorcycles built between 1984 and 1998 when it was largely replaced by the new Twin-Cam 88 engines. My 96 Softail is puking massive amounts of oil from the breather tube.