Finally did my breather bypass (pics included)
#241
Interior of back plate. My intention was to keep the breather element completely out of the ac, but when I got it today, I kind of got pissed that it was so big and used it anyway. I can still close it off completely from the interior, without much trouble. Kind of figured that would be best.
#242
#244
Any chance that you have photos of the reverse side - what silver connectors did you use for the black pipes, and where did you get the black tubing.
Does it spit oil onto the engine?
#245
Hidden breather
After doing this mod, my gas mileage has noticeably increased. I went on one of my usual rides today, 120 ish miles, used MUCH less gas. Bike seems to run a little better, not sucking in hot crank case air.
I never had any oil in my air box in the first place, so I'm not worried about running a tube to the ground to let it dump. Don't forget to seal the breather tube holes in the back side of the air cleaner element.
Last edited by Cozz; 03-26-2016 at 04:16 PM.
#246
Thanks...
#248
SE Ventilator cause I like the way it looks and I already have it installed. With the K&N filter, flows 287CFM which is fine for the heads I have which flow 252CFM
(2) Dorman 785-410 1/8" MNPT - 1/4" hose fitting (advanced auto)
(10') 1/4" vacuum line (advanced auto) yep plenty left over.
(1) 1/4" vacuum hose "T" (advanced auto)
(1) 1/4" to 3/8" vacuum hose adapter (advanced auto)
(1) Spectre 3991 Breather Filter (advanced auto) http://shop.advanceautoparts.com/p/s...m=spectre+3991
total - $15.49
took the backplate and drilled 25/64" holes in it
Then I used a tap, M10x1.25 to thread the holes
Then I cleaned the breather holes and oil drain holes thoroughly with brake cleaner
Then I siliconed the oil drain holes that go back into air intake (yep that was the only color hi-temp/oil resistant silicone I had on hand.
Then I screwed in the fittings, attached hoses, attached clamps, inserted "T" in proper location, ran the hose inside the front pushrod tubes, and located the filter just behind my oil cooler and fastened in place with a zip tie. The "wetness" you see in that last pic is from my cam change a couple of days prior to this mod.
all said and done, $16 in parts and about 45 minutes of my time that will prolong the life of my motor.
I bought 1/4" silicone hose which is really flexible and almost disappears behind the pushrod tubes/motor fins to run down and out. Very clean set-up and I couldn't be happier with it.
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mgmmgm (10-13-2016)
#249
Uphill vs Downhill Tubing Runs?
What are the pros/cons to running up/down vs the heads butterfly breather elevation in running the exit tubing?
I've seen a number of setups over the years since HD started using the 'vent to intake' system and guys running both directions. Just curious.
I've always run mine down, but some say the slight amount of oil in the mist, if the tubing runs up, will drain back into the crankcase.
Thoughts? Much appreciated.
Thanks JetD
I've seen a number of setups over the years since HD started using the 'vent to intake' system and guys running both directions. Just curious.
I've always run mine down, but some say the slight amount of oil in the mist, if the tubing runs up, will drain back into the crankcase.
Thoughts? Much appreciated.
Thanks JetD
#250
What are the pros/cons to running up/down vs the heads butterfly breather elevation in running the exit tubing?
I've seen a number of setups over the years since HD started using the 'vent to intake' system and guys running both directions. Just curious.
I've always run mine down, but some say the slight amount of oil in the mist, if the tubing runs up, will drain back into the crankcase.
Thoughts? Much appreciated.
Thanks JetD
I've seen a number of setups over the years since HD started using the 'vent to intake' system and guys running both directions. Just curious.
I've always run mine down, but some say the slight amount of oil in the mist, if the tubing runs up, will drain back into the crankcase.
Thoughts? Much appreciated.
Thanks JetD