HOW TO: Krankvent Install - Yamaha R1 Forum: YZF-R1 Forums
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post #1 of 21 (permalink) Old 06-28-2007, 12:54 AM Thread Starter
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HOW TO: Krankvent Install

This is a cool little device. You can find more information about the product at www.krankvent.com. The order comes with everything needed for a proper install: the Krankvent, 2 clamps, 2 tie-downs, and 1 vacuum cap. I was advised that you should have your AIS removed and the inlets blocked off. Use Wheatman's how-to thread for that. Here is the link.

HOW TO: 04-06 R1 Smog Plates Install

Continuing, since the airbox is a semi pressurized ram, part of that pressure is then also sent to the crankcase via the crankcase breather hose. Theoretically, this makes the engine lose power due to increase resistance for the piston to push down from the slightly higher pressure below it. Also I'm guessing the AIS plays a part here as well as it is connected to the airbox as well. Anyways, the effects can be debated. Here is the install. Again, assuming the tank and seat are removed. If not, use this link for reference.

How-to remove seat and gas tank

Pic 1, locate crankcase breather hose as it connects to the airbox. It is the big light grey one. The next picture shows it detached.

Remove the stock clamp and compare with what was shipped. Slip the sturdier clamp over the hose.

Check out the way it looks in the next pic. Install the Krankvent. Red arrow showing the direction of air flow. Then tighten clamp and voila.

Just realized my spelling goes south at 4am. Mods please change title if possible. thanks...
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post #2 of 21 (permalink) Old 06-28-2007, 01:00 AM Thread Starter
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For the airbox, add the vacuum cap and seal with clamp.

I didn't like how far the krankvent went to the right as shown in the last pic above. It looked like it was going to touch a lot of other parts. Ended up relocating it by cutting the breather hose about 4 inches so that it pointed upwards and out of the way. Here is how it looks now. Again this was to prevent the sometimes blowout of oil that occurs.

K&N has a special section just for crankcase filters found here.

http://www.knfilters.com/vent.htm

Filter is now installed. I don't know if I can keep it pointing upwards or I may need to tuck it next to the generator
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post #3 of 21 (permalink) Old 06-28-2007, 03:44 AM
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This is a nice clean install that I tried and it vents out nicely.


Free bump
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post #4 of 21 (permalink) Old 06-28-2007, 04:01 AM Thread Starter
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Quote:
Originally Posted by 02R1guy View Post
This is a nice clean install that I tried and it vents out nicely.


Free bump
I saw that but I routed mine upwards and as far away from the crankcase as possible to minimize oil from blowing out and give gravity every chance to get it back down. I'll show it in a pic.



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post #5 of 21 (permalink) Old 06-28-2007, 04:38 AM
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Thanks roo

I forgot that little item was on my list.
I'll have to get one on the way...

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post #6 of 21 (permalink) Old 06-28-2007, 04:44 AM Thread Starter
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Quote:
Originally Posted by Crankshaft View Post
Thanks roo

I forgot that little item was on my list.
I'll have to get one on the way...

waddup



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post #7 of 21 (permalink) Old 10-05-2007, 09:33 AM
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Quote:
Originally Posted by kangaroo View Post
I saw that but I routed mine upwards and as far away from the crankcase as possible to minimize oil from blowing out and give gravity every chance to get it back down. I'll show it in a pic.
How's your method of install working so far? Also, in terms of what it is supposed to do, are you happy with the krankvent (there seems to many differing opinions about this upgrade)?

Last edited by shabakand; 10-05-2007 at 11:57 AM.
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post #8 of 21 (permalink) Old 10-05-2007, 10:03 AM
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so the crankvent k&n filter is prolly unneccessary right?

*so $100 for a one way vent? what the hell

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post #9 of 21 (permalink) Old 10-05-2007, 11:52 AM
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Hey Roo whats up,

Lets us know how your Krankvent install went and most importantly how you feel about the mod.

Also thanks again for your thread on the canister removel tips it works great man very stocked about it.

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post #10 of 21 (permalink) Old 10-05-2007, 12:05 PM
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02R1guy,

I checked out your how to nice job man. Feed back from you also would be much appreciated.

thanks

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post #11 of 21 (permalink) Old 10-05-2007, 05:09 PM Thread Starter
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Quote:
Originally Posted by shabakand View Post
How's your method of install working so far? Also, in terms of what it is supposed to do, are you happy with the krankvent (there seems to many differing opinions about this upgrade)?
Since adding the filter, I had to move it down to the top of the crankcase now. As I also removed the emissions canister, space wasn't a problem and the tube was still pointed a little up. I took it up to the canyons and blasted a good 500 miles on it. I didn't find any oil in the filter.

Overall, the bike revs better/smoother at higher rpms than before. No real noticeable power or performance gain. I'm happy with it.



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post #12 of 21 (permalink) Old 10-05-2007, 05:12 PM Thread Starter
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Quote:
Originally Posted by brnrber View Post
so the crankvent k&n filter is prolly unneccessary right?

*so $100 for a one way vent? what the hell
well you have to understand that oil mist mixed in the air is still coming out. The filter is like 18 bucks. So doesn't hurt



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post #13 of 21 (permalink) Old 10-05-2007, 05:18 PM Thread Starter
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Quote:
Originally Posted by 408gmoney View Post
Hey Roo whats up,

Lets us know how your Krankvent install went and most importantly how you feel about the mod.

Also thanks again for your thread on the canister removel tips it works great man very stocked about it.



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post #14 of 21 (permalink) Old 10-05-2007, 07:59 PM
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Quote:
Originally Posted by kangaroo View Post
Since adding the filter, I had to move it down to the top of the crankcase now. As I also removed the emissions canister, space wasn't a problem and the tube was still pointed a little up. I took it up to the canyons and blasted a good 500 miles on it. I didn't find any oil in the filter.

Overall, the bike revs better/smoother at higher rpms than before. No real noticeable power or performance gain. I'm happy with it.
Any problems with the crankcase hose getting kinked after you drop the fuel tank in place? That hose is pretty flimsy. I hope to put mine on this weekend, although I am still a little concerned that there is some restriction caused by the kranvent (observed when blowing thru it). Thanks, by the way, for all your input and tips.
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post #15 of 21 (permalink) Old 10-05-2007, 11:02 PM Thread Starter
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Quote:
Originally Posted by shabakand View Post
Any problems with the crankcase hose getting kinked after you drop the fuel tank in place? That hose is pretty flimsy. I hope to put mine on this weekend, although I am still a little concerned that there is some restriction caused by the kranvent (observed when blowing thru it). Thanks, by the way, for all your input and tips.
I noticed that the hose did bend, but no where near what I'd worry about.

I didn't notice any restriction when I blew through mine.

Let me know how it goes.



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post #16 of 21 (permalink) Old 01-03-2008, 02:17 AM Thread Starter
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pics relinked



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post #17 of 21 (permalink) Old 09-11-2009, 08:22 PM
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KrankVent install

Quote:
Originally Posted by kangaroo View Post
I saw that but I routed mine upwards and as far away from the crankcase as possible to minimize oil from blowing out and give gravity every chance to get it back down. I'll show it in a pic.
>
Good install photos! MOTORDOC here, we make the KrankVent @ Krankvent.com.
Was going over install info & wanted to update.
First, the KrankVent MUST be located high, off of the crank case. At high rpm, oil is flung into the CC vent line & if the KV is near the vent, the oil sits on top of the very sensitive valve & tends to hold it closed. Mounting the KV high, 10 to 12 inches above the CC vent, allows the oil, & condensed vapor, to return to the CC. If you use a small filter, it must be kept clean so it breathes. Filter not necessary unless in dusty conditions as no air is allowed 'in" only out!
This was 'discovered' working with a race team with 8 race bikes shipped to races worldwide. They didn't want the added weight of 12 inches of hose! Finally convinced them to do the above, they stuffed the KV into an OPEN catch can. Result: 3 days of engine dyno testing, NO oil in catch can, zero! The dyno didn't show much increase in HP at 10,000+ rpm BUT when engine installed, on the track, engine was very smooth, acceleration was fantastic! Rider could exit turns much earlier, harder, faster, with total control!! The team took ALL remaining races by at least half a lap & was protested every race! When judges got to the KV in the CC & asked "what's this?" reply was a PCV Valve (that is what the patent is for) the judges gave it a pass, as they should.
The comment about terminating in the airbox is spot on! Don't!! The air ram effect will pressurize the output end of the the KV & reduce KV sensitivity that releases engine pressure pulses created by the pistons moving down.
R1 Forum riders, in the "Special Instructions" section of the order form at www.krankvent.com mention "R1 Forum member" & a 15% discount will be given when shipped!
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post #18 of 21 (permalink) Old 09-12-2009, 06:03 AM
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You see... if nothing else, this hole thread justifies my time spent reading. <many hours>

I can see ordering few of these soon... '09-R1 & my chevy truck.

something so simple yet makes total since... nice one guys. I'm stoked!

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post #19 of 21 (permalink) Old 09-12-2009, 07:40 AM Thread Starter
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Quote:
Originally Posted by MOTORDOC View Post
>
Good install photos! MOTORDOC here, we make the KrankVent @ Krankvent.com.
Was going over install info & wanted to update.
First, the KrankVent MUST be located high, off of the crank case. At high rpm, oil is flung into the CC vent line & if the KV is near the vent, the oil sits on top of the very sensitive valve & tends to hold it closed. Mounting the KV high, 10 to 12 inches above the CC vent, allows the oil, & condensed vapor, to return to the CC. If you use a small filter, it must be kept clean so it breathes. Filter not necessary unless in dusty conditions as no air is allowed 'in" only out!
This was 'discovered' working with a race team with 8 race bikes shipped to races worldwide. They didn't want the added weight of 12 inches of hose! Finally convinced them to do the above, they stuffed the KV into an OPEN catch can. Result: 3 days of engine dyno testing, NO oil in catch can, zero! The dyno didn't show much increase in HP at 10,000+ rpm BUT when engine installed, on the track, engine was very smooth, acceleration was fantastic! Rider could exit turns much earlier, harder, faster, with total control!! The team took ALL remaining races by at least half a lap & was protested every race! When judges got to the KV in the CC & asked "what's this?" reply was a PCV Valve (that is what the patent is for) the judges gave it a pass, as they should.
The comment about terminating in the airbox is spot on! Don't!! The air ram effect will pressurize the output end of the the KV & reduce KV sensitivity that releases engine pressure pulses created by the pistons moving down.
R1 Forum riders, in the "Special Instructions" section of the order form at www.krankvent.com mention "R1 Forum member" & a 15% discount will be given when shipped!
There was a big discussion of this in another thread. A member actually lost power but the engine ran "smoother." Overall a great mod. However on the R1 it is a little difficult to install properly as space in that area is very limited. I have found my filter to be saturated with engine oil as the tubing krankvent/filter combo allows only one location which is not far nor "above" the vent hole. I'm going to be removing the filter shortly.

How about a nice discount for the awesome thread creator? : I will be needing another one for my 98 R1 build this winter. But overall thanks for a great product!



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post #20 of 21 (permalink) Old 09-12-2009, 01:34 PM
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KrankVent install

Quote:
Originally Posted by kangaroo View Post
There was a big discussion of this in another thread. A member actually lost power but the engine ran "smoother." Overall a great mod. However on the R1 it is a little difficult to install properly as space in that area is very limited. I have found my filter to be saturated with engine oil as the tubing krankvent/filter combo allows only one location which is not far nor "above" the vent hole. I'm going to be removing the filter shortly.

How about a nice discount for the awesome thread creator? : I will be needing another one for my 98 R1 build this winter. But overall thanks for a great product!
I understand the space is tight, BUT, getting the KV up high, off of the CC vent, is essential. If there is oil coming out of the KV there are two main reasons.
1. The KV is not mounted high off of the CC breather port.
2. The small hose(s) from the cam cover to the AIG>airbox MUST be blocked off. Otherwise, the vacuum created by the KV will suck air thru the air box > thru the AIG > thru engine > Oil & air out the KV!
Keep in mind that the engine must be "airtight" so that the only vent is thru the KV, mounted HIGH off of CC vent port.
When done as specified, you'll get the HP, response, etc. expected. First time out, be careful, you may not catch the bike in time!!
Of course, these mods are for track racing bikes!
Discount available to R1 members, put "R1 Forum Member" in Special Instructions section of order form & 15% taken off at time of shipping.
See you in the winners circle!
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