Harley Davidson Evolution Oil Breather

Ever since the introduction of the EVO engine with breather heads and the use of high flow air cleaners breather blow by has been an issue.

Harley davidson evolution oil breather. This is an age old problem for the Harley engine. Harley Evolution Engine Breather Diagram Pii Organisedmum De Harley Davidson Oil Pump Diagram Wiring Schematic Diagram Harley Evo Oil Line Fitting Creativehobby Store. Dennis Kirk has been the leader in the powersports industry since 1969 so you can rest assured that we have your back when it comes to bringing you the best Breather Kits for your Harley-Davidson.

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. More efficiently by promoting unrestricted breathing. Most Evo Twin Cam models that require Breather Kit features chrome breather cups that have built in.

My 96 Softail is puking massive amounts of oil from the breather tube. Simply thread into place for a clean looking breather option. In you 89 model the crankcase breaths from behind the oil pump through a tube that runs to the backside of the air filter assembly.

The crankcase vented air had to be recycled through the engine. Not only that but we have them all in-stock and ready to ship to you today. While running it hard at high exented rpms will add a bit more oil to the breather box you have way way too much.

Top breathing engines breath or vent through the top breather bolts which are threaded into the heads of a Harley Davidson motor. 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. Available in polished or chrome plated finish.

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. As a result a fine mist of oil in the vented crankcase air condenses in the air cleaner and must be cleaned out from time to time. 48 out of 5 stars.