Kawasaki Vulcan 800 ~EPA & Emissions System ByPass... I Mean "Fix" (VN800B/C/A/Drifter/Classic) 

Ty Greason Glad to help where I can :)

Awesome! Glad I could help!

CruiserDayz ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YgplVW6WTNk.html

​@@CruiserDayz can you please share us what is name of hose caps you showed us ok this video?

Yup, that’s what she said…..😂😂

It won't this is the worst thing you could do to this bike. It's like choking off all the blow by and will only destroy the motor. It's a ridiculous video that you never be performed by anyone.

Hey buddy, how you been. Are you saying that this is not advisable because that's what I'm saying, I think this is a very bad idea, please advise

@@willsrestorations I left mine alone for 26 years and have had no issue. That said, many guys modify their exhaust for some reason, and I suppose a modified exhaust might behave differently. Or, a bike with a vacuum leak might allow the air suction system to open at idle when vacuum should snap it shut. Rather than fixing a vacuum leak properly, some might remove the air suction system, and notice improvement if the leak was there. In a properly functioning system, there should be no noticeable improvement at all. If those valves stick closed, it would be like not having them at all, though if they stick open from carbon buildup I suppose there could be an issue. It's easy to clean those reed valves at every valve lash adjustment. I don't believe this system affects crankcase pressure, since the rudimentary free flowing "PCV" in this old bike is just a vent tube going to the outside of the air filter, with a dangling tube to drip oil onto the ground from there.

@@spelunkerd So blocking these intakes of clean air through the valve covers does not really affect performce and does not risk damaging the engine either? The effect would mainly be related to the exhaust fumes being less clean? I am making a VN800 bobber and would like a cleaner look by removing ”unneccessary” tubes etc. Would leaving the intakes open to suck unfiltered air be better or worse than blocking them with caps in your opinion? Thanks

@@peterlindfors1066 Many guys block that system off, I don't know what would happen if it were left open. I did a whole playlist on the 1995 VN800, and the one titled "know your motorcycle" is the first of a two part video describing that system in detail.

@@spelunkerd I will have a look at that video. I have actually watched most of your content related to the vn800, its all really good and informative 👍 I might check the valve clearance today and take a closer look at those reed valves and clean them if needed. I read about people who have been running with blocked systems for years without problems. I am yet to read about someone who has actually experienced any problems with this modification. All the warnings come from people without experience of the blocked system themselves. I take that as a good sign 😬

You're welcome!

Thanks I did remove it later.

I know this was a long time ago but any suggestions having the same issue

foghorn Key 2 years since, did this cause Problems? I'm assuming you just opted to leave every thing in place and capped the air hose from the air intake that feeds this system. That also seemed the easiest way to go to me as well.

Pinda1700 The big caps were 3/8" the small ones were 1/8" I believe. Just get a good assortment like this one and it will have all of them: www.amazon.com/gp/product/B008DZSZK6/? tag=vn800epa-20

CruiserDayz Thanks! I will order the caps from Amazon. :)

that hose probably goes back to the box on the right side behind the covers. Disconnect it at the box and put a cap on the port.

I'm not near my bike right now. 2 states away actually. The hoses only fit on the air box in one way though. The small one fits on one inlet, the larger one on another. If you Google vn800 service manual, it will show where the other ends go, if that's what you're asking.

Maybe for priming... There is a vacuum line that goes from the petcock to a vacuum source that opens the petcock only when the engine is running. Make sure that vacuum line is connected and good.

Glad I'm not the only one who noticed. A V-twin engine's crankcase undergoes a lot of pressure changes while the engine is running (high crankcase pressure when both pistons are down, and low pressure when both pistons are up) and the slight negative crankcase pressure actually reduces pumping losses and helps the engine run slightly smoother and more efficiently. Mr. Kawasaki knows a lot more about making an engine run strongly and efficiently than Mr. Cruizerdaze.

@@hossesarse yeah I don't know where this guy gets his information from but this is a terrible idea and it should never be performed on any bike

It injects fresh air directly in the exhaust system. Has nothing to do with egr or pcv.

@@willsrestorations I'm old school Ran a reducer to a 1/4" fuel line down as a road draft tube like all vehicles had before the EPA. Dribbles a little oil but never builds pressure.

Scott Harvey Good question! There is no other way for the crankcase to vent. Everyone's been running their bikes like this for over 15 years now without issue though.

+mrjaytion Not sure how much cooling will be achieved by allowing air to come in the EGR system

I know this is 8 years later but you should always check the bearings in the front wheel and check the tire for run out as it may be a old tire or the rim is no longer straight or your triple tree bearings on no longer any good. Always jack the bike up with the front of the bike off the ground and the rear tire on the ground and check all your tolerances and check for anything that is loose

Yep. Still running strong.

Breather? Does that mean one of those tiny crankcase filters?

Best thing to do is just remove the hoses and vent the breathers straight to atmosphere.

This is sound advice! I have learned since making this video that the ports I was calling off were in fact the crankcase vents and not solely an EGR. I was regurgitating information I found in detailed write-ups that was inaccurate.

@@CruiserDayz so is your advice now not to go forward with this removal???

@@willsrestorations The advice would be to either let them vent to atmosphere (there is an internal check valve and filter in each head) or divert to a catch canister.

@@CruiserDayz yes they are called Reeds. Sometimes my spelling sucks.

@@CruiserDayz so you're saying just leave those 2 big crank case inlet ports open with no plugs and that should be safe?

Better late than never, but here it is. Removing this valve stops the engine from circulating exhaust back into the combustion chamber. The exhaust gasses reduce engine performance. The bike will pollute more, but hey, bikes get better mileage than most cars anyway.

yes

It is not. It’s only necessary to do after you remove exhaust baffles, swap for straight pipes or modify the air intake for more air.

@@FiresidePrinting i have removed the baffles and notched a two-inch hole in the exhaust im in the process of removing the epa which jet do you recommend ? also is plugging the valve covers ok?

@@FiresidePrinting ?/

mikke fergerson I used a Dino jet kit. They call theirs a number 134. I read on one of the forums that their numbering system is different. I’ve thought about this epa mod a bit more. I think it might be a bad idea. The system is not directly connected to the exhaust system. Other commenters on this video say this is a PVC system. I think they are right. Plugging this will trap blow-by gasses. It will accelerate the degradation of your oil. I’m not doing this one. I think my next mod is a tach, so I can see when I’m approaching 8000 rpm. There is a rev limiter at 8200, or so I’ve read.

@@FiresidePrinting what if I Rerouted The vacuum tubes from the valve cover back to the air filter

David Hooper Could have a version without EGR system.

If PAIR valve is off as shown on the video I think none of this bikes will successfully get passed legal inspection done at every single country where you guys live for sure.

Chris Niehaus

Everything Motorcycles.com now hiring, MC Technicians

Still runs great

Ya dude... I pulled it off about an hour ago. I already had V&H pipes which sounded good but man, now it just sounds clean. Nice and throaty. After taking it off I noticed right away that I had been running my idle way too high. Great video. I watched this last year when I wanted to do it but was hesitant. Today I said, “fuck it”, and I’m happy I did. Thanks again.

@@mitchelltaylor8282 how did it work out in the long run for you ?

@@criticalthinkerguy worked great. Ended up selling the bike and getting a VN2000. Did the same thing to my new bike. Seems to be common practice with most bikes.

Bubba Mack That's your crank-case breather hose. You need that.

wheree would that be located

rejecting is not necessary. you are basically just keeping some of the exhaust gasses from going back into the engine to be reburned.

tnx on quick answer...i`we debaffled my exhaust, so i hope to some litlle power next seasson..

Take the plugs off the top of the engine. These should actually be left open so the heads can breath

BULLSHIT, Harleys aren't vented!

@@DawnNLN-ee2kh This is not a Harley... so your comment is bullshit

Harley are vented into the air clener

@@edeco50 crankcase in Vulcan is also connected to airbox. Cylinder heads and Valve covers take fresh air from airbox and it goes to exhaust pipes. There are one way valves that stops exhaust gases from going to airbox. Vulcan has no egr like system. Sorry for my english.

@@marcinsudi agree with you

Best thing to do is just let them vent to atmosphere.

@@CruiserDayz so doing what ur done in video is allgood I don’t wanna pull apart to put back to stock lol

@@jesses480 If you put the tube between the 2 heads, just take that tube off. Leave those 2 ports open to the air. They have one way valves and a filter behind them so it's all good.

@@CruiserDayz sweet I left the stock pipe on and just blocked it off so I lll just remove the hole tube then thanks

Allowing it to say trapped? Damn my bike won’t say anything 😂🤣

@@keithk7451 that's cuz you probably drive a electric bicycle

@@willsrestorations naw my boy i got a HD for sure….if i could post a pic I would. My son has a 97 Vulcan which was why we were looking at this. I believe there to be very minimal, if any, drawbacks to doing this.

@@keithk7451 that's because you're not mechanically inclined or just making foolish statements or uneducated statements. You don't see any real disadvantages to doing this because you don't know any better. But you go ahead and do this to your son's bike and you'll find out first hand. There's always some goofball on RU-vid showing you how to do something that will destroy your vehicle or motorcycle and this is a clear example of one. This will also cause the reeds in the valve covers to become sooted up with a lot of carbon and cause them to no longer work which is a serious issue. But hey you continue believing what you want even if it is defective thinking. It's nice to know you have a Harley-Davidson where every single part was manufactured in China.

@@keithk7451 did you just brag about having a Harley-Davidson Chinese piece of junk. Every bolt rots out after 3 years. Nothing but a hunk a junk. I love how people claim that it's made in America when absolutely not one component of a Harley-Davidson was ever manufactured in the United States and all the parts come from China. Obviously you're not a mechanic so you saying that there's minimal drawbacks doesn't really hold any water because there are serious drawbacks to doing something like this as now the reeds Will not be able to operate properly and you will cause major problems with the motor by doing this ridiculous modification which does nothing but damage and has no upside.

Why not?

As a master of motorcycle mechanic and a shop owner I advise strongly against doing a hack like this as you can cause some serious problems with your bike. Blow by is an essential part of elimination gases out of the heads. If you listen to guys on RU-vid they will destroy everything you own.

@@willsrestorations does leaving them open to the atmosphere make any difference?

@@criticalthinkerguy first you have to understand that there are reeds under the valve covers that will not work properly when leaving these open to the atmosphere and can only draw a tremendous amount of contaminants into the top half of the motor causing catastrophic failure. I don't understand why people want to modify something that's not modifiable.

Anyone have a good feel line diagram for the 96 1500 drifter ?

Fuel