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Author Topic: Breather bypass  (Read 7138 times)

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VANAMAL

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Breather bypass
« on: November 02, 2013, 01:03:09 PM »

I never liked the idea of the oil venting back into the tb so i made this. drilled,tapped,lock tite,plugged and epoxy vents. No more oily filter. can vent down to ground or buy a catch can. I may be willing to make a few of these
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VANAMAL

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Re: Breather bypass
« Reply #1 on: November 02, 2013, 01:03:39 PM »

-
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jcd520

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Re: Breather bypass
« Reply #2 on: November 02, 2013, 01:38:48 PM »

I had a 2001 FLHT with a big motor and a 42 mikuni, did the same thing and it worked great. I just ran the drain hose down to the ground behind the motor ,,no more problem!
 I have had two 110's since and have had no sumping problems-----------at least not yet.
That is a great fix though for those of you whose bikes suck oil out and it drips out of your filter cover!
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old_dirt

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Re: Breather bypass
« Reply #3 on: November 02, 2013, 02:24:21 PM »



Been doing this awhile myself.  Here's one on my 120r.

I just leave the two hoses separate.
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ChopperPilot

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Re: Breather bypass
« Reply #4 on: November 02, 2013, 10:36:39 PM »

Good idea, thanks for posting.
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Fullsac Performance

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Re: Breather bypass
« Reply #5 on: November 03, 2013, 11:43:38 AM »

I have been ground venting the breather for years on my personal bikes. Keeps the TB clean and reduces carbon build up in the chamber.  :2vrolijk_21:

Steve
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timo482

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Re: Breather bypass
« Reply #6 on: November 03, 2013, 12:00:10 PM »

do you use the same bolts? or does it require a banjo type bolt with the hole in the side?

mine vents to a tube thru the end of the bolt.... it makes a mess of the air cleaner but really does not leak any oil, still the mess is quite hard to clean

to
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VANAMAL

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Re: Breather bypass
« Reply #7 on: November 03, 2013, 01:27:22 PM »

Reuse same bolts. On the stock filter the bolts have the hole in them.
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porthole

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Re: Breather bypass
« Reply #8 on: November 03, 2013, 10:42:28 PM »

Van, since the heads vent through the bolts how are you venting to the new fittings?
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Re: Breather bypass
« Reply #9 on: November 04, 2013, 09:27:39 AM »

With a stock Ventilator for example, the air passes through the bolts, then travels through a small passage diagonally down to the throttle body. I uses silicone in this passage to block it. This forces the air to escape through the new fittings that are drilled into the area around the bolts. Basically your blocking the original exit to the TB and giving the air a new path. See Vanamals first pic and diagonal passages are easy to spot

Steve
« Last Edit: November 04, 2013, 09:29:29 AM by Fullsac Perf »
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porthole

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Re: Breather bypass
« Reply #10 on: November 04, 2013, 10:10:02 AM »

With a stock Ventilator for example, the air passes through the bolts, then travels through a small passage diagonally down to the throttle body. I uses silicone in this passage to block it. This forces the air to escape through the new fittings that are drilled into the area around the bolts. Basically your blocking the original exit to the TB and giving the air a new path. See Vanamals first pic and diagonal passages are easy to spot

Steve


Was first looking at this on my phone and didn't notice his backing plate is not the type with the push on rubber hoses that go from the bolt to the TB.
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Delta

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Re: Breather bypass
« Reply #11 on: August 28, 2014, 08:06:02 PM »

I never liked the idea of the oil venting back into the tb so i made this. drilled,tapped,lock tite,plugged and epoxy vents. No more oily filter. can vent down to ground or buy a catch can. I may be willing to make a few of these
So, are you still willing to make a few of these? I only need one. Please!!
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FlaHeatWave

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Re: Breather bypass
« Reply #12 on: August 28, 2014, 11:06:02 PM »

VANAMAL, You are 'Da Man!!!

'Kicking myself in the butt for just running across this Thread, when I've been wanting to do this on the '09 for awhile now, eyeballing the Ventilator a couple of days ago when I was cleaning the K&N.

Everybody else that has posted pictures of this, has A/Cs other than the Ventilator.

I would like to run the hose between the cylinders to small catch can mounted on the Left (frame)down tube.

A few questions, if you will...

1) a parts list Please, drill sizes, tap size, barb size, and hose size / type?

2) Is it necessary for the rear barb fitting to be offset from straight down to clear the servo motor?

3) Other than blocking the inlets in the backing plate, will the Breather Bolts require any modifications?

4) After having a chance to run this set-up for awhile, is there anything that you would (have)change(d)?

Thank You,
« Last Edit: August 28, 2014, 11:07:51 PM by FlaHeatWave »
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PanheadJeff

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Re: Breather bypass
« Reply #13 on: September 13, 2014, 01:32:36 PM »

I went a different way with mine. This won't work for every one but it is good for ideas. Most of the parts used were recycled from stuff laying about:
3/8 hose
5/16 hose
RTV sealant
one of those S hoses from the original set up
A chrome soft copper sink water tube
2 3/8 cable clips
2 #10 screws
FuFu paint

Pictures should give a good idea of how it all went together. I drilled the holes for the pieces that pop on to the original breather nipples a tad under sized for a good fit. For securing the set up to the external of the engine, I simply used the existing oval holes in the area by making a expanding anchor out of pieces of tubing. I inserted a piece of 5/16 tube into a piece of 3/8 tube along with a piece of split 3/8 tube for a backing piece. Insert the assembly into the oval holes and the #10 screw will run in and expand the hose enough to grab and hold without doing any damage.

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