Originally Posted by Just Me

After doing more research and going to a couple of bike nights talking and seeing for myself I decided to put the by-pass tubes back in and even made up a plate to block off the slots for more air [hot engine air] on my Fuel Moto air cleaner. Learning later that the stock air can deliver more air than a stock motor can take but I like the K&N washable filter so I'll stick with it.
So, I found several people that have done the mod and some that totally did away with the breather all together. The one's with no breather were mostly aftermarket but I did find a HD round SE also blocked off. These aftermarket bolted directly in place of where the stock hoses go by removing the hollow nippled bolts and replacing them with solid bolts. I cant see no venting at all, cannot be good for the engine but anyway, no one had any gripes of the way they set it up.
Having had the by-pass venting only maybe 100 miles before I went back, I noticed white oily gunk dripping out the end of the hose. Oily I understand but the white usually means water. The only water involved would be condensation on my non wethead. If this is what's been going into the engine it sure cant help anything out!

Originally Posted by xcbullet

The dip stick would blow out first.

Originally Posted by wscott

========================

" This external venting thingy is a bunch of hype. "

Well your misinformed on this one.

1ST IS venting oil soaked crankcase combustion gases was never routed into the intake of internal combustion engines to increase perf etc,it was done mainly for EPA & emission reg's ans thats it.

Sucking in overheated combustion gases soaked with hot oil mist from the crankcase in fact causes multiple runability issues with some affecting the motor right off the bat and others as time/miles go by which to name a few are:

* LOSS OF POWER & TRQ DUE TO THE MOTOR SUCKING IN A PREHEATED OIL IST SOAKED INTAKE CHARGE FROM THE CRANKCASE VENT.

* THE HOT OIL MIST CRANKCASE GASES ALSO CAUSES EXCESSIVE CARBON BUILDUP ON PISTONS & VALVES (ESP BACKSIDE OF INTAKE!) IN COMBUSTION CHAMBERS THAT OVER NOT THAT MANY MILES CAN THE MILES INCREASES COMPRESSION A BIT.

* THEN DUE TO THE ADDITIONAL CARBON BUILDUP IN COMBUSTION CHAMBERS CAN INCREASE THE MOTORS OCTANE REQUIREMENT LEADING TO IN SOME CASES DETONATION AND MAYBE BIT HOTTER RUNNING MOTOR TOO.

* AND PUTTING INCREASED COMPRESSION ASIDE FOR A MOMENT ANOTHER THING THAT ALSO HAPPENS IS WHERE THERE'S EXCESSIVE CARBON BUILDUP THAT ARE THE HIGHER SPOTS / HIGHER POINTS OF CARBON ON TOP OF THE PISTONS THAT ARE SUPPER HEATED GLOWING BIRGHT RED TO WHITE COND WHICH ALSO CASES ISSUES WITH PRE-IGN & OR DETONATION TOO.

* PREMATURE BUILDUP OF OIL & DIRT NOT ONLY ON THE THROTTLE BLADE IN THE THROTTLE BODY & INTAKE BUT ALSO OIL ETC IN THE AIR FILTER ITSELF TOO.

AND YOU THINK ALL THE ABOVE STATED ISSUES ARE JUST A BUNCH OF NON EXISTING HYPE WHICH THAT COULDN'T BE FURTHER FROM THE CASE.

Anyone that builds motors (esp higher perf lvl) knows a preheated intake charge of hot oil mist from the crankcase going thru the intake & motor degrades perf right off the bat like loosing a bit of prw/trq along with also causing other longer term issues like excessive carbon buildup , detonation etc too.

Happy motoring.

Scott

Originally Posted by RIPSAW

You're correct. One way out. How to answer your other question is above me. Just quoting Harley's service manual. Just know if we all did this thinking the laws don't apply to us would bring us back to the 60's and with all the vehicles on the rode, we would China's pollution problem.