is this a hose air breather?

[Bumblebee]

Yep, either leave it be, use p.a.i.r block-off plates and route to the airbox, or with a filter on the end of the crankcase breather mounted up near the valve cover, or do the sucker mod.

I have a brand new set of PAIR block off plates and never saw the benefit of installing them...the PAIR system on the Gen 2 weighs very little.

.....and I get a few fun noises on decel that harken to the days of yesteryear when I was young and fun.....

 

[phalse]

I have a brand new set of PAIR block off plates and never saw the benefit of installing them...the PAIR system on the Gen 2 weighs very little.

.....and I get a few fun noises on decel that harken to the days of yesteryear when I was young and fun.....

true, no one cares about removing them for the weight, thats silly. but for the purpose of a tune you have to have blockoffs depending on who's tune you run. so that means none of this slick stuff about routing the crank case to the pair valves.

for example for 2WDW, you need blockoffs.

another example.. the BTMoto tune that i used on my R1M did NOT require blockoffs and they even said keep the O2 sensor plugged in - they liked to have it still trying to adjust the maps (slightly, as no oem wideband on the yamaha) for altitude, i believe, but who knows.

i realized that ive mentioned a krankvent a few times and no one seemed to catch on. you guys should check that thing out, i had one for my R1M and its perfect for this.

 

[Bumblebee]

true, no one cares about removing them for the weight, thats silly. but for the purpose of a tune you have to have blockoffs depending on who's tune you run. so that means none of this slick stuff about routing the crank case to the pair valves.

for example for 2WDW, you need blockoffs.

another example.. the BTMoto tune that i used on my R1M did NOT require blockoffs and they even said keep the O2 sensor plugged in - they liked to have it still trying to adjust the maps (slightly, as no oem wideband on the yamaha) for altitude, i believe, but who knows.

i realized that ive mentioned a krankvent a few times and no one seemed to catch on. you guys should check that thing out, i had one for my R1M and its perfect for this.

I've used a similar system on other (carbureted) bikes before where I removed the airbox in favor of pod filters so I feel what you are saying....

The big takeaway I see is this is your bike, and your vision so go crazy with it and have fun doing it.....

 

[Kiwi Rider]

that pressure is not exerted the same at all times, and there's pressure loss closer to the end of the pipe. the exhaust gasses would have to magically make a 90 degree turn entering the wrong way "up" the exhaust bung and travel up the hose to the crankcase. its not a thing. harley guys have done it for who knows how long.

and like i said, you put a krankvent on the hose coming from the crankcase. nothing is permitted in, only out. that thing is awesome =D

 

[Dnyce]

Regardless if you route thru the airbox or to the exhaust or the pair valve, or a tiny filter, u won’t notice the 1hp gained or loss or the possible 1% extra bit of wear on the engine or anything. It literally doesn’t matter on a stock motor, regardless of tune. Do whatever makes u happy

But, in that picture, maybe it’s my eyes but I don’t see an exhaust, so maybe it’s a turbo. Turbos are known to have high crankcase pressure, lots of blowby. So while he may have to use that filter, it’s literally routed in the worse place. The filter will get soaked and continually drip right on the tire. Hopefully no one copies it

 

[phalse]

eh? no one does this for hp related reasons either, thats silly. the reason you do this is so that crap isnt being re-run back through your intake. exact same as a catch can on a car. it is its own reward.

i remember from a GSXR i had years ago that suzuki likes to keep their charcoal canisters in the tail of the bike, its on my to do list to eliminate all that stuff and at the same time i'll do the hose reroute+krankvent thing. when i do, i'll post a quick writeup =D

yep, i'm sure by now the OP is real clear on all this.. haha

 

[Mythos]

Yep, either leave it be, use p.a.i.r block-off plates and route to the airbox, or with a filter on the end of the crankcase breather mounted up near the valve cover, or do the sucker mod.

I say do the sucker mod! Positive Crankcase Ventilation! I was going to do this on a bike. Probably wouldn't on a brand new one but if it's a few years old and already has numerous parts removed or replaced, I say have at 'er! Mod to the high heavens! The setup I saw was routed to the PAIR but even if you have the PAIR removed, there's no reason you couldn't take a block off plate off, drill and tap it and put a hose fitting on it. No irreversible mods there, just a block off plate. The setup I saw was made out of PVC and had a plastic valve to manually switch pipes to passive venting. That would allow the rider to compare performance of PCV v stock venting. Like you said, it's doubtful anyone will feel a difference of a hp or less and that would definitely be in peak rpms. The guy used PVC to make a PCV!! Isn't that awesome! I might do this on one of my bikes and personally, I like the idea of having the PAIR removed and just drilling a block off plate. Can't remove the PAIR on the Gen2 ZX-14R but I have block off plates on my busa and Gen1 ZX-14. I guess I would put a fitting on both block off plates and make a T with the vent hose. Might as well take advantage of both PAIR ports. I don't think I'd use PVC but I like the idea of the switch valve which could easily be adapted to rubber or silicone hose.

 

[Mythos]

This thread hopefully answered @DING 's question but it sure took the long way around...

yep, i'm sure by now the OP is real clear on all this.. haha

We do get to talking, don't we...

 

[sixpack577]

I say do the sucker mod! Positive Crankcase Ventilation! I was going to do this on a bike. Probably wouldn't on a brand new one but if it's a few years old and already has numerous parts removed or replaced, I say have at 'er! Mod to the high heavens! The setup I saw was routed to the PAIR but even if you have the PAIR removed, there's no reason you couldn't take a block off plate off, drill and tap it and put a hose fitting on it. No irreversible mods there, just a block off plate. The setup I saw was made out of PVC and had a plastic valve to manually switch pipes to passive venting. That would allow the rider to compare performance of PCV v stock venting. Like you said, it's doubtful anyone will feel a difference of a hp or less and that would definitely be in peak rpms. The guy used PVC to make a PCV!! Isn't that awesome! I might do this on one of my bikes and personally, I like the idea of having the PAIR removed and just drilling a block off plate. Can't remove the PAIR on the Gen2 ZX-14R but I have block off plates on my busa and Gen1 ZX-14. I guess I would put a fitting on both block off plates and make a T with the vent hose. Might as well take advantage of both PAIR ports. I don't think I'd use PVC but I like the idea of the switch valve which could easily be adapted to rubber or silicone hose.

I would love to see back to back dyno runs on that!

 

[Dnyce]

I did look at the crank ven u mentioned, looks pretty cool for a Harley. An I4 bike has two pistons going up as 2 are going down, doesn’t create the same effect as a vtwin with both pistons going up and down at the same time. On a vtwin u can blow the oil cap right off on a high speed run sometimes.

I know you’re saying nobody does this for power, or weight, but from what I’ve seen on i4 bikes, there is no visible “crap” going into the intake. If there was invisible “crap”, u would see a hp decrease or a wear increase. So if not for power, weight, or in the case of the busa, nonexistent crap, what’s the gain? That’s what the og poster should know, it doesn’t matter what u do, only how u do it, so do what u want lol

 

[Cruising180]

pffft...rear brake he says...one rotor on the front does the trick it...so it seems...lmao
But seriously, that's how the roll racers do it now, me, I like 3 rotors, and actually use the rear brake too...but apparently one rotor will slow you down from 180mph...lol

Yeah NOPE! LOL I get it if you have a dedicated drag bike that is track only but on the street with cellphone addicted soccer moms in 6,000 suvs I want ALL the brakes tyvm. Seriously how light does your street bike really need to be? It's the same to me when you see a 6' swingarm on a road bike. Hits me the same as a loud civic that has 38* of negative camber.

 

[Kiwi Rider]

Yeah NOPE! LOL I get it if you have a dedicated drag bike that is track only but on the street with cellphone addicted soccer moms in 6,000 suvs I want ALL the brakes tyvm. Seriously how light does your street bike really need to be? It's the same to me when you see a 6' swingarm on a road bike. Hits me the same as a loud civic that has 38* of negative camber.

 

[Cruising180]

View attachment 1692745

Huh?

 

[phalse]

guys.. no one removes pair valve stuff for weight reduction. ever. UNLESS its some kind of hardcore dedicated race bike. by this i mean someone with their WERA license at a minimum, someone who races MotoAmerica, something like that, whatever. you know, something legit.

as for the reason why you would not want your crankcase vented into the intake the way it comes from the factory, hey, do some googling. watch video of someone emptying a catch can on their sports car. you want that stuff going back through your intake?

well, i dont =) thats all. thats the whole story. no big deal =D

right now we may as well talk about color instead. but we dont have to do that because we all know grey is the best color haha

 

[Kiwi Rider]

Huh?

This discussion on breather hoses is like a game of tennis, back and forth, back and forth lol

 

[Dnyce]

We all just talking nonsense lol but a sports car isn’t a Hayabusa, it’s just not the same. That’s why u don’t see catch cans on sportbikes.

 

[Cruising180]

This discussion on breather hoses is like a game of tennis, back and forth, back and forth lol

Ahhh lol yeah it is!

 

[sixpack577]

We all just talking nonsense lol but a sports car isn’t a Hayabusa, it’s just not the same. That’s why u don’t see catch cans on sportbikes.

There is one bike!
Kawasaki zx636
If you wheelie those bastids much past 45°...oil comes pouring out...ask me how I found that out, lol
Doing an 11 o'clock for about a quarter mile on my friend's bike, with him and several others watching, it was almost vertical, and I was just cruising about 40-50mph, about a hundred feet before I passed them, I went up in smoke, literally, lmao, I turned and saw that the bike and I were engulfed, like somebody hosed off Ghost Rider, lol.
Me, not to be deturred, gave it the old "F it", if I'm buying a motor I'm getting my money's worth, and preceded on another quarter mile(stunt spot has a half mile staight, and smoke hit just before midway, I wondered what they were pointing at before I saw and smelled the burning oil, lol)
I turned and rode the bike back to find it fine, minus oil all over the back tire and exhaust(which caused the smoke).
The site glass had plenty in it too.
Long story short, if you tip them back, they puke oil out through their p.a.i.r
I messaged Tony Carbaholl and he told me about those bikes needing catch cans, as he had stunted them, and new guys that had them.
Some good laughs, a good burnout to get the oil off, and all was well!

 

[sixpack577]

guys.. no one removes pair valve stuff for weight reduction. ever. UNLESS its some kind of hardcore dedicated race bike. by this i mean someone with their WERA license at a minimum, someone who races MotoAmerica, something like that, whatever. you know, something legit.

as for the reason why you would not want your crankcase vented into the intake the way it comes from the factory, hey, do some googling. watch video of someone emptying a catch can on their sports car. you want that stuff going back through your intake?

well, i dont =) thats all. thats the whole story. no big deal =D

right now we may as well talk about color instead. but we dont have to do that because we all know grey is the best color haha

Oh you don't know some of the guys here, they'll do anything to lose a couple ounces of weight from where ever.
We mainly blame @c10 for his weight loss plans, weighing parts, and titanium addiction...as he spread it to several of us, lmao

 

[GIXERHP]

That’s a $5 hose and a $10 filter at most. Why it’s way back there hanging down I have no idea. At best it should be up, so the oil can drain back

Its back there so when the filter fills up with oil, it can oil the rear tire!