DOC HARLEY: LET’S PUT AN END TO OIL IN YOUR AIR CLEANER

[@johnjohnson2855]

Doc, there’s very few stand up people left in this world, but you my friend might be one of the last few remaining. Thank You for all you do to help us Harley Davidson Lovers.

[@LowCountryHarleyDavidson]

Your words are so kind. I appreciate your post…..Doc

[@Peter-976]

Doc publicly acknowledging that oily air going back into the motor is not good. Kudos to you Doc!!

[@roadglide1745]

True but makes me wonder if this mod will make EPA Nazis come out for not keeping oil and vapors under control in system. Car engines are supposed to be sealed use the PCV vent back into air intake system. That's the real reason HD does it this way. Then again some oil can seep out of housing.

[@jordantserghanos2604]

@@roadglide1745 if you are not dumping it in the ground and properly dispose of the oil, the EPA has nothing to fine you with... If you vent it to the ground that is something you can get in trouble for I am sure. For example, I empty the residue into my oil container and dispose of it with my dirty oil at the recycling center..

[@roadglide1745]

@@jordantserghanos2604 True but Vapors are a problem too. Charcoal canisters on all newer vehicles surprised that hadn't been mandated on motorcycle's.

[@Evirthewarrior]

Harley finally joined every other Vehicle manufacture that is already doing it, direct injection is a problem and it is not going away anytime soon, and it is getting worse. over 60% of all vehicles are doing this now and more will be in the next 5 years. Including motorcycles, some already have DI, some are being developed.

[@5695q]

@@roadglide1745 My '98 Sportster had a vapor recovery system with canister, California at it's finest. The air box had a trap door that was vacuum controlled to keep the fuel vapors from escaping plus the vacuum controlled the fuel valve and closed it off when not running, they called it VOES.

[@curtisg.8671]

Wish this guy was every mechanic at every Harley Davidson dealer. What a heck of an honest technician. Thanks for all the knowledge you give the world Doc!!

[@absolutestubbornness6367]

True not like mine leaving the exhaust loose and not putting back some bolts on the clutch cover

[@mikeb46]

When my 2000 FXDWG arrived at the dealer I requested the screaming eagle filter set up with the K&N reusable filter. I saw this video and went to look seriously at what I had. Lo and behold, there is a metal tube that connects the two banjo bolts. Nothing goes inside the air filter. There is a rubber hose that exits from the rear most banjo and disappears behind the rear cylinder. Way back then, the mechanic did me a huge favor and I didn't even know it. My old Harley has NOT been drinking oil since the day it left the dealer! I don't know where it came from or who made it, but it is professionally made and it does the job.

[@Butcho108]

I am a Harley owner , and yes a non- mechanic. I am blessed with a mom and pop shop that keeps me running. "The "Doc" is sharp as a tack, and always trying to improve things that need improving. You explained so clearly that even I understood the issue. Bravo Doc!

[@LowCountryHarleyDavidson]

Thanks for sharing!…..Doc

[@larrywheaton7037]

That old style shovelhead way is how I oil my chain 😎

[@keithchrysler3732]

Great idea!

[@albertaboy1139]

Nice to see someone not pushing the brand and being honest. Makes me love my Harley’s even more.

[@61soldiergirl]

I agree, most Harley dealership employees showing good honest modifications other than stock brand stuff might not keep there jobs. I’m thinking Doc is either the owner or he is a plain very valuable employee.

[@racerx2580]

How about Harley-Davidson having pride in their craftsmanship and engineering instead of everyone else having to fix their shit or come up with fixes?

[@LowCountryHarleyDavidson]

Take a look at 2024 models…..Doc

[@Group_Anonymous]

@@LowCountryHarleyDavidsonI have one ☝️

[@blg020]

They have to do this to be compliant with pollution regulations.

[@troyroberts]

WOW Doc! Thank you, I modified my air cleaner for an external breather and convinced a couple of friends to do so as well. To have you show what it does to a piston and reluctantly acknowledge that it is not a bad idea to do this... your continued sage advice is appreciated, as well as the validation ;-)

[@jamesmailly7990]

Edelbrock makes a great aluminum anodized fuel filter , took me about 2 hours to do my exterior oil breather on my 05 Road King !! Bandaging Done !! And as a plumber/fitter, I can route things pretty well ! The fuel filter I got is anodized black , love it !!!!

[@scott_0492]

wow! someone as well respected as you, Doc giving this your seal of approval, that speaks volumes!!!! I had a external breather setup on my Dyna and now one on my Twin Cam SGS. there are still lots of naysayers, but both of my bikes exhibited better running afterwards

[@porkchopspapi5757]

Naysayers? Some think puking hot dirty oily air into combustion chambers is a good thing?

[@adotintheshark4848]

Sportsters benefit also.

[@WisoldSage]

Primary drain plugs for my 2004 FLHTI were perfect plugs for the filter backplate holes when I rerouted mine. Nice to see an experienced Harley tech addressing this.

[@chriszasada9756]

Now that I have had my Fat Bob for over a year , I am looking into doing this on my 96 twin cam . Thanks Doc will be doing as much research as I can before making the modification.

[@jordantserghanos2604]

Doc, It's really great to see this issue acknowledged and addressed. I can't tell you how many times I have had this conversation with people about putting the oil back into the combustion chamber is a bad thing.. Great video it helps when an experienced Harley certified tech acknowledges something that is really so obvious when explained.

[@marvelharris9540]

Its mostly water though right? it came from the motor so it couldnt be lethal for the motor in small quantities ..... baxter on his channel suggests only doing an ebs if your bike breathes really heavy.... on the M8, most carbon buildup on the pisions is because of sumping not IBS.

[@JDJD-xn4je]

No it’s actual oil. Just wipe off the inside of intake mine used to be coated in oil before modifications

[@JayyBird93]

@@JDJD-xn4jewhat modifications did you do?

[@johnniethefox]

Doc...so glad to see you acknowledge that this is a problem for the motors ..I've always put external breathers with a T piece and a pipe going between the pushrod tubes and to a small filter mounted on the bottom of the frame on all my bikes...they run smoother and breathe better..... keep on keeping on Doc....hell yeah 💪..... johnnie WOLVES MC RUSSIA.... cheers 🍻🇷🇺

[@adotintheshark4848]

thank the EPA..screwing up motors since 1970.

[@creigmacc]

My Road King had this issue since I bought it. Sold it and bought a used Stratoliner. Best modification ever.

[@LowCountryHarleyDavidson]

Really? You went and post here....Doc

[@markmccardia9282]

Done! When Doc recommends something like this, I'm gonna do it.

[@wilsta67]

Yeah I modified my stock air cleaner on my 22 lowrider S to fit the trask assault external breather and ran it to a catch can. Can’t post pics unfortunately on here.

[@bbr3721]

Hey Doc. Stumbled across your videos a couple weeks ago. What a treasure of knowledge. People like you are what have always made Harley great. Thank you! I hope I see you out there one of these days.

[@markjaycox8811]

Is that a new dance? stumbling across video's? How is that even possible? Did your cat empty your video cabinet on the floor? Do you stumble across every meal you eat, too? How do you get to work? Do you stumble across the pavement without wheels on your car? Just wondering.

[@nwfiberg8095]

Did this to my 04 FXDWG. Ran to a catch can, I noticed oil mist would come out of the vent holes in catch can. I put a sock over it and all is good. This is not a stock motor that has been highly modified.

[@manchild111]

DK Customs makes a breather catch can kit for HD's. They also have breather bolts with a filter in them if you want a trick look. I have their catch can kit on my '17 Slim S. Works flawlessly. She even runs better after fully warmed up. Saves time. Bolt on & go. IiRC, works with ANY air cleaner.

[@tommylitchfield3450]

You can easily make your own set screws with a Dremel cutoff wheel. Just cut them to length and then cut a slit in the end and use a very small regular screwdriver to tighten the set screws, and don't forget the locktite. Green is best, since you never want them to come out.

[@markchase4513]

Old drag racing trick,just weld fitting in header and plumb crankcase vent lines from head to exhaust.

[@davidbones8947]

Re burn that spells emissions control lol

[@waynesiminski8268]

Thanks for having the honesty to admit that the Harley setup is not good. Many people at the dealerships are scared to say anything that might upset the MoCo. First thing I do when I get a new bike is setup a catch can system to avoid putting that crap in my intake. Another great video. Thank you Sir.

[@ALLofYOU2]

My DirtyBob Loves it! SUCKS IT IN THEN SPITS IT OUT!!!

[@tomkrause62]

Been doing this since my 1st TC motor in 2001. The interesting part is that when you vent to the atmosphere, or into a catch can, scarcely any oil comes out those breathers.

[@camomanofcranham]

As it comes out as barely visible vapour you would think it wouldn't be such an issue with the running/tuning and quite likely emissions. But as the engine gets older and starts to wear out the vapor will increase. car manufacturers run the crank breather into the cam/valve cover I'm sure HD can do this its just the way HD have done it and plan to continue to do so and cost cutting...In 2020 sportsters are no longer sold in the EU and UK due to their poor emissions, it was stated that its not worth HD up grading the emissions its just easier to delete them from the range....

[@blueshurler]

And what does this do to the warranty? HD isn't fond of mods and could invalidate the warranty.

[@JDJD-xn4je]

That’s because running to intake makes vacuum

[@MaaZeus]

@@camomanofcranham This isn't really a Harley problem, other motorcycles also do this from what I have gathered, if not all of them. Few months back I installed an airbox removal kit into my old carbed 2005 Triumph Speedmaster. The kit contains K&N pods that are slapped right into the carb (or throttlebody if you have newer injected model) and for the breather tube, which used to be attached into the now tossed airbox, a small K&N filter to prevent creepy crawlies and crap getting into the crank case. Anywho, I checked the inside of the airbox and it was quite nasty. It had gathered quite a lot of oily gunk in there during its 18 year lifetime. Good thing my baby is not sucking that crap into the engine anymore...

[@camomanofcranham]

@@MaaZeus if it works that great...I'm looking at getting them for my bikes over time...

[@HamStands]

I've used open-air breather bolts since new on my '15 Sportster. Never had enough oil come out to justify a catch can, but it does leave a slight oil mist on the oil bag with longer trips - nothing a quick rag swipe can't handle. Rather have it outside than in the intake!

[@mikedanaher3413]

DK Custom products has external breather solutions for nearly all harley bikes.

[@johnsonandsons4]

If you have any mechanical ability at all, you can buy the hose, T, and a couple of extra breather bolts if you do it the way shown in the video for pennies on the dollar.

[@fjoy3376]

@@bigbob21 who makes the pre drilled manifold?

[@dieselsoggydog6299]

I made my 2017 M8 107 a free breather (stock air filter) back 3 years ago. Used a Plastic Tee from a car vacuum line to tie the two breathers together. Then I ran the line out the air filter housing at the inner front corner then through the front push rods and down and back along the frame to where the fuel over flow line dumps. Never seen a spot on the shop floor yet and no more oil in the throttle body.

[@69bikerider]

Same here

[@chaduphold7179]

I would love to see a video of how you modified your air cleaner, step by step. Great video.

[@johncasor9698]

got the same problem. 1997 FXDL... pulled the exhaust looked in the ports dry... good. changed out the butterfly valves. still oil in the air cleaner. install bypass tubes. good now..

[@LowCountryHarleyDavidson]

Well done John….Doc

[@Wolfsbane115]

good stuff Doc, did a similar job on my 07 softy when I went to 110ci, could find a catch can, so Im using a small K&N filter which I wash from time to time

[@drwombat]

Nuclear option tbh. Catch cans can be big and obtrusive and hard to find a place to mount this is how I plan on doing it, w/ a simple washable breather filter, when I do mine

[@69Busa08Nova]

Sooo…I did what a lot of people do and used rtv, ultra copper to be exact, scuffed and cleaned the port very well with 99% alcohol and put it in the heat to make sure it was dry, pushed the silly-cone through and let it dry for a couple days…just pulled the filter to clean it and the rear cylinder silly plug was about 1/2” out…needless to say, I then thought to tap it and looked online, found your vid lol. I do ride my bike probably harder than most (although, not harder than some) so having something solid will be better. Going to Laconia in a few days so glad i caught this. The whole not being able to find the set screw makes me a little nervous but I’ll see what I can do when the stores open tomorrow. Take care.

[@69Busa08Nova]

Side note, I did this back in December so it’s been there for about 7 months although it was winter time so there’s only 2500 or so miles on that setup.

[@GalvTexGuy]

I've been using the DK Custom external breather kit on my '14 FLHTK since 2015.

[@VancouverBrent]

Do you think that would work on a EVO ?

[@perrymullinix2267]

I just purchased a custom air cleaner and thought I could just replace my stock air cleaner on my 06 electraglide ultra. Now I'm so confused I don't know which way to turn. I have watched about three video here on the topic so I have a lot more homework to do before I just "replace" my factory air cleaner.

[@LowCountryHarleyDavidson]

Like dad said,”measure twice-cut once” Research until You are satisfied

[@trekbsg]

I recently installed a feuling dipstick crankcase breather, fingers crossed it helps.

[@kpnomad7]

I wondered if crankcase pressure is cause , and shouldn't that be addressed first and like yours solve end result!

[@trekbsg]

@@kpnomad7 An internal combustion engine is basically an air pump, when pistons move up & down the air on top of the piston isn't the only air being displaced, the air underneath the piston is also affected as the piston moves up & down which is why some type of crankcase ventilation is required in order not to build up too much air pressure(& vacuum) into the crankcase, the E.P.A. requires crankcase "gasses" to be routed and vented back into the air intake track of the engine in order to burn off any unburnt gasses(that may slip by the piston rings) to help reduce hydrocarbon pollution, the problem that Harleys have with oil in the air cleaner is that the crankcase vents are being overworked by the excess pressure of ever increasing engine volumes and with the extra air pressure the oil suspended in the crankcase vents doesn't have enough time to separate from the air and return back to the oiling system, the hope of adding an additional point of ventilation into say the dipstick apparatus such as the feuling is to decrease the overall excess pressure from the system itself helping the overall efficiency of the ventilation thereby giving the suspended oil more time to separate.

[@kpnomad7]

@@trekbsg will moco deny warranty for external breathers , like these or dipstick breathers???

[@trekbsg]

@@kpnomad7 Good question, I wouldn't think so but it's a good idea to verify with dealer or moco, my bike is already out of warranty so it's not something I'm personally concerned with.

[@frankpeletz1818]

I did this on my 92 and 93 EVOs- only difference is I ran the vent hose to a Shifton catch can.

[@chopperchopster]

I have always vented to atmosphere . Never into my air cleaner. Screw the EPA!

[@thakery5720]

I did an S&S Stealth filter just like yours and after joining the hoses with a T ran it back to the filler spout on my 2010 Dyna. Removed the filler spout, drilled and tapped the spout for a hosetail and put a length of hose with a T in it - one for the head breathers,one for the filler spout and the third (with a breather valve in it) up to a catch tank. **** I think the most important thing to tell people though is not to over-fill the oil tank - on a cold engine with the bike on it's jiffy stand only fill the tank so the level is one third the way up from the low level up toward the full level because the bike is upright when you are riding it and the oil expands when it is warm, so the level if set as I said - one third - will be just about at the full mark when the bike is upright and warm. Always remeber that when the engine sits after use, all the oil in the engine runs down into the crank and cam compartments and can measure about a quart of oil. When you start the bike, the pump sends that oil back to the tank and if you have over-filled it then it goes from the tank to the engine via the vent passageways, the crank then churns the oil up and creates an overly heavy 'oil-mist' that then carries-over into your inlet/air filter and spoils your engine.****

[@RenegadesGarage]

Doc Harley.. Great tips as always. Thanks for sharing them.

[@Truthdosentexist69]

It would be nice if Harley Davidson fix problems like that themselves instead of expecting customers to do it.

[@Blap552]

Geez, i just checked my air cleaner('08 1200)and it was a Mess,same w/the intake. It's coming from the Front cylinder so i guess this will be my solution? I don't even mind if i have to route it to the Ground, r&r the umbrella seals may/may not do anything it sounds like? Thanks Doc! Starting to learn "Whats Up!"😅

[@qf4phlyer]

Great info Doc! Need you to take over the engineering dept at the Motor Company

[@Powerlifter888]

Very good things got a copy for RSD air filter but will keep using the stock screws with the same little pipes to get the catch can behind the filter with a little T fitting like this 😉

[@natemiller1392]

I had a 18 Sport Glide. Great bike!

[@JoeFurtado-xv5no]

I run an A1 cycles vented dipstick on my street glide ran it 1500 miles pulled the air cleaner no oily blow back in the air cleaner or on the throttle body where before I had a small amount of oil in the air cleaner solved the blowback issue.

[@LowCountryHarleyDavidson]

Thanks for sharing your experience…Doc

[@MacRides1]

So Doc, I love this idea and want to do it to my 2019 Ultra Limited. It makes sense NOT to suck oil mist into the airbox - 1) it shortens the life of the air filter and 2) dirty oil mist going into my cylinders can cause additional carbon build up and that dirty mist is basically doing the exact opposite of what the air filter box is supposed to do - that is, keep outside contaminates OUT of the burn process and have only CLEAN air for combustion. So now the big question - would doing a mod like that void your factory warranty? I obviously don't want to void my warranty. I mean, if you did a poor job on the mod and it sucked in a set screw that you used to block the stock ports then of course harley would not cover it. but it doesnt really effect anything on the bike so i'm not sure why it would void a factory warranty.

[@JDJD-xn4je]

If you think you’ll do a poor job just buy a aftermarket with ebs and if you need warranty just put original back on

[@jordantserghanos2604]

IMHO, That guys SE ar cleaner is an easy way to do it Doc, your way is better as it doesn't interupt the air flow going into the throttle body with the air hoses protruding into the air stream. Again a great video Doc!

[@drwombat]

The customers hollow (umbrella?) Screws had little collars or nubs on the end for him to attach hoses to... Is that factory? Or did he have to find special replacement screws to purchase? Docs screws appeared to have no where to fit a hose even if he wanted to. Any idea?

[@red.riot.2280]

Question. I did the similar mod.. I have a m8 107 using a stage 1. Slip ons. High flow. After switching from a SE to a DK customs, the bike threw some codes. One was for fuel sender(swapped to a larger tank and different sender) and one was a P0151 for lean. Would this mod case a sensor to read lean? Thanks in advance! Love your content!!

[@oldphart-zc3jz]

All my motorcycle engines run road draft tubes straight to atmosphere or head breathers straight to atmosphere (atmospheric pressure will not overcome crankcase pressure) because built in plug fouling is a bug not a feature. Ask any auto mechanic self included who has to clean out intake manifold EGR passages (best done in a parts cleaning oven so the ash can be blown out).

[@RideAmerica]

Awesome Vid. I put a DK customs external breather on mine.

[@whatstheproblem6606]

Mark Volchko does it help? I been looking at the same

[@RideAmerica]

@@whatstheproblem6606 I think it did. I'm happy with it. And to clarify, I put an EBS on my stock air cleaner and it vents into their 4 stage catch can.

[@JackieTreehoorn]

Important tip on securing screws to not get sucked in, had 4 new HD’s over 18 yrs, never had a issue w/ 1 except.... 1st Harley, Sportster, had straight pipes, jetted carb, SE air filter installed. 2 yrs later, rolling at 45 mph, bikes sounds like it damn near exploded, pull over, get the tow, dealer finds tiny screw, blew the piston & head to hell, pretty much new engine, 5 cent screw. Ironically Low Country Harley was honestly the dealer that installed it all! Not to worry, when it happened had moved & it had been taken off by new dealer, LCHD was always great!

[@kenkooper5958]

I like your air cleaner mod. Clean and professional.

[@waibaddayu]

Did the same mod with a catch can on my ‘07 FLHRSE3. Buell catch cans are perfect for the job.

[@joshrandall5297]

Doc, will doing this void the HD warrany?

[@ceeruger2088]

No.

[@jeffg8672]

I have a autozone little solo brake bleeding bottle that magnets to your rotor. It sits inside my stock 107 air cleaner cover with the vent hoses T into it. Drilled a couple small holes in the lid to let air escape. I dump it out a couple times a season. Done. Been in there since 2017

[@LowCountryHarleyDavidson]

Send pictures to my Email address....Doc

[@Lettersandstuff]

Just stop overfilling your oil.. I put mine at the 3rd dot. That stopped making my filter oily.. 20k so far it was oily until I figured it out

[@scott_0492]

Agreed! however, you are still injecting, hot oxygen depleted air into the combustion process.

[@robertsmall6076]

O

[@jimmybe64]

So you have put a camera in you combustion chamber and seen the clean pistons with your idea over Doc and just about everyone else? kzbin.info/www/bejne/aGS7hJJrm8SnldE

[@bigblue3568]

@@scott_0492 very little oxygen depleted air is getting in, the overwhelming amount of fresh air being sucked into the throttle body more than makes up for it.

[@miketrevino8761]

Yup took me a min to play w oil levels. I noticed if it was a hair underfilled im good. A hair over it spits oil.

[@darrenschneider9722]

DK customs have great products to fix this

[@chrisnollenberg6419]

I ordered their catch can kit last week. stoked!

[@charliepoodle5151]

Your right they do, but at a huge price, you can make your own for under $25 and with almost no mechanical knowledge, it’s super easy.

[@OneFreeMan17]

I’ll be ordering that for my sportster soon

[@beardedforlife3740]

@@charliepoodle5151 their kit really isn't that huge of a price. If someone doesn't know what all goes into a system like that, it makes it pretty simple since they include everything you need. All the products I've gotten from them are quality products and when it comes to my engine I'm buying quality

[@charliepoodle5151]

@@beardedforlife3740 it is compared to how easy it is to do yourself and with the same quality products. Why pay a premium just for a name ? It’s not even visible......

[@twincam8888]

Looks good. We have been doing similar for 25 years.

[@hhuodod2209]

Buying a Honda normally fixes most issues x

[@Evirthewarrior]

I don't want to rain on your parade of "Honda is awesome" but they are going to the Direct Injection style that is causing this issue due to EPA and EU regulations. The 1100 Africa Twin already has it and the New Rebel will also. Kawasaki is going to be doing it in the next couple of years also. This problem has been plaguing Cars for over a Decade now and more and more cars, trucks, vans, ECT are getting them year after year. Might want to actually look into what is causing it instead of going "Harley bad" Oh yea, Indian Motorcycles do this also.

[@hhuodod2209]

@@Evirthewarrior I live in the uk, HD are not very popular, ive only ever seen two in the last 10 years, both were broken down, im more in to my groms tbh, but some of the HDs look cool and i think its a shame there not more popular x

[@Evirthewarrior]

@@hhuodod2209 Yea, smaller bikes might not have this issue, but as engines get more powerful, more and more are going to the Direct Injection and circulating the oil back into the engine to burn it off. There are a few solutions being worked on, like Toyota's Dual injection where they alternate between DI and Valve injection, but you still get build up on the cylinder heads. It is not going away any time soon and literally every car and motorcycle manufacture is looking at doing this if they have not already.

[@hhuodod2209]

@@Evirthewarrior That kind of sucks, luckily im restoring a kmx 125, its a 2stroke that makes lots of nose and has no environmental crap to deal with. If only it had abs. Never been interested in bike bikes, i can ride a small bike on the edge and not go to jail.

[@perryhart3172]

Yea,but who the fu#k wants a Honda,they are for women and kids.

[@kennethwise7108]

I don't own a Twin Cam or M8 strictly Evo and I can appreciate a guy who thinks outside of the box like this!

[@Blap552]

Ken did you re-route your breather tubes then? I have an 08 1200 and the front cylinder sprays oil into my air cleaner! Thanks

[@kennethwise7108]

@@Blap552 yep, both are connected to a brass "T" fitting and go directly to the ground

[@Blap552]

@kennethwise7108 Noted sir! I'll get on this asap, thanks!

[@kennethwise7108]

@Blap552 yeah, it's a pretty easy thing to do. Even better if you can get your hose to go all the way to the rear of your bike on the right side.

[@Blap552]

@kennethwise7108 yeah I was thinking I don't really want to route it Under the Back tire for Sure so Good idea! Cheaper than the catch can

[@willielopez3126]

DK Customs on my 2020 Heritage Classic

[@tonyl8314]

Which one? I have a 2020 heritage and was looking into DK

[@willielopez3126]

I will look up the model number and I will let you know

[@willielopez3126]

I used model # DK-DIY-BH-BRT $49.99

[@timothyconvery7957]

Hey Willie so you have the 107 or 114 thx

[@willielopez3126]

I have the 107

[@standingintheson1]

I did the same thing years ago on my 2008. That oil leaking down the side of the motor was too much to take.

[@turninmonyin2noise978]

Truly amazing! Harley engineers design poorly, then Harley Sales people over charge for a name put on poorly engineered products and consumers have to fix it Harley Davidson can't figure out why they are struggling. Dahhhh

[@Ladosligese]

reason i stick to Honda and Kawa

[@jimmybe64]

EPA bro or face fines if you are corporation

[@turninmonyin2noise978]

@@jimmybe64 the metrics and Polaris ie Indian don’t have these issues and they meet EPA rules.

[@jimmybe64]

@@turninmonyin2noise978 I dont have issue. Only when you get really big pistons making high pressure in your crank case and then burning that oil. Where does Polaris send there oily mist from crankcase? Copy them if they have a better way. Postive crankcase ventilation is what Harley uses. You can't vent to atmosphere like older vehicles.

[@paparalph4]

I have an 04 Heritage that I "T"d off the air cleaner. Instead of a catch can I cut a three inch copper tube and beveled half of it to fit up against the exhaust pipe just past my floor board and SSTL hose clamped it. Used fuel hose to hook it up to the "T". Now I'm burning it after combustion. No drips or smoke being such a small amount.

[@LowCountryHarleyDavidson]

Old drag racing modification👍

[@FabryRock]

Harley and M8 sucks 👎🏻👎🏻👎🏻

[@Peter-976]

@FABRY ROCK just another hater that can`t afford a Harley, hey?

[@FabryRock]

@@Peter-976 i rode more than you to say that

[@Lettersandstuff]

Mines pretty badass.. sorry about your luck

[@FabryRock]

@@Lettersandstuff how many miles?

[@scott_0492]

blah, blah, blah, great input 🙄

[@miamimotogroup5371]

My 2020 48 sportster may have some excess oil coming out. Very minimal, but i want to avoid oil seepage coming out the air filter. Gonna keep researching

[@tomjamin4952]

Thanks Doc. I modified my 2017M8 Street Glide to eliminate the oil issue. Thanks for confirming that I haven’t created a long term issue for my engine. I did a 2 into 1 T like you did. Nice and clean now.

[@pomdejesus8150]

Your videos helps me maintain my bike so much specially I am 2hrs away from the dealership. Do you have a video on how to adjust properly the clutch and how to make it easy coming into neutral? because i am having a hard time finding the neutral and my roadking is less than 1k miles.

[@LowCountryHarleyDavidson]

I have thought about it but what would I do with all my time at work? Make videos for free and let the wife buy groceries 🤷‍♂️….Doc

[@johncasor9698]

shovelhead i had 2 of these yes they left there mark... it was bad machining on the cases and yes blow-by tubes. now better machining on cases and shove blow-by into intake...

[@LowCountryHarleyDavidson]

That old crank case breather going up to the air cleaner….would puke a pint if the bike sat for a month….Doc

[@shaneitsaname6135]

I have been running my twin cam venting externally for 20 thou Km , it runs better, stronger ,cleaner, than before , when I mention it to my riding acquaintance's they look at me like I'm dumb . More fool them.

[@lh1678]

It takes someone other than Harley to come up with that...Genious!

[@jhanlon1903]

did this on my 2016 RK, ran two tubes to the bottom of the back plate of throttle body. tee them together, drilled a hole in the back plate, then short tube to an elbow to the catch can which sits between the tappet blocks, very snug, works great, my TB sucks fresh air only, no more HOT oily air,bike runs much better.

[@curtissumner9797]

DK customs has breather kits. Makes a huge difference. My sensor in the throttle body kept getting cloged. Not anymore.

[@bradleyalexander5821]

Doc. Harley is well smart, we do so appreciate this talent. Bought my first Harley at this dealership in 06, bad experience with service, obviously new ownership. 👍🏼

[@garystone9973]

After ruining two pair of jeans to blow by oil, I installed an external catch can in front of the engine. Two years later, I have not any more issues.

[@pauld1905]

Did this on my 2015 deluxe for around 10 bucks, using fuel line directly to nipple fitting off rocker cover to one metal inline gas filter. One side to each end of gas filter. Drilled a 1/4 inch hole in filter to release pressure. Hole facing up...difference in performance is noticeable. No drilling of backplate necessary

[@randylucas2458]

I built my own catch can out of a bunch of little brass fittings from the hardware store it works great and I've never had a problem with it since I put it on I put a valve on the bottom of it so I could drain it into a cup and throw it on my firewood

[@billcarp3523]

You'll get more water build-up in the catch can than oil. So the water - was before - going into your cylinder. Not much, but hey, why have any at all? Glad I put the catch can and breather on my bike. No oil leaking out the bottom of my air filter.

[@waynes4612]

On my 09 road King classic instead of paying the ridiculous price Harley was asking for the bolts I hollowed out out some 3/8 threaded rod put two hoses to it and ran it underneath the bike. All told less than $10. As for drippage I rarely see any on the ground underneath my bike unless I put it up for the winter time come spring I will see a drop about the size of a dime.

[@montana1636]

My ole man uses an oil air separator canister (mounted above the engine and plumbed with the breather hose to dryer inlet fitting upward vertical so scavenged oil can return gradually while the clean(er) crank case air charge passes through to the outlet at the top, hose runs to one side of the breather plate, the other is capped off, bike runs cooler, according to my right ankle and lower calf muscle, no more spot buildup in the manifold or carb boot, a slight sheen inside the hypercharger but nothing like the Exxon Valdez Slick left by the OEM plumbing, less oil consumption as well, did notice about a 10° oil temp increase in stop and go traffic, he cooled it down almost back to normal with an off idle fuel mixture adjustment, which also smoothed out slight shudder during slow twist gradual acceleration

[@NKBobcat]

Thank you for being so honest! You are now my go to guy.

[@LowCountryHarleyDavidson]

I appreciate that!…..Doc

[@JeffinTD]

One thing to be careful of, make sure there aren’t any low spots in your breather line. If you do short trips below freezing quite a bit of condensation occurs. One brand had a recall. The breather could act as a p trap, and if it froze, blow by pressure would build up and blow oil out of engine seals.

[@jackrose6996]

That's some solid advice. It really doesn't get that cold where I live very often, and I wouldn't have put much thought into that situation. I'll take it into consideration. Thanks.

[@kenpuzio645]

Doc, completely agree about keeping the oily air out of the t-body BUT.....your customer's method looks like the rubber breather tubes will get pinched and flattened by the air cleaner element where it seals to the backing plate.

[@LowCountryHarleyDavidson]

I good added tip for others to watch out for. BTW his cleared..Doc

[@robertnewman7701]

What do you think of venting the transmission cover instead of a vented breather? As in a trask m8 vented transmission cover.

[@timm9842]

my 96 was sucking oil. changed to a new KN filtersnd the oil usage stopped

[@josecarlosrodriguezb7167]

hi from spain, i made the same thing 2 years ago and I have a little "plastc oil tank" under the engine, non visible, and the oil goes there ;)

[@LowCountryHarleyDavidson]

Well done Jose…..Doc

[@dennisharrison4744]

I got my 09 sportster 1200c done that way just got a crank case filter it's been on there 6k miles it's below the air filter it's leaked 0 oil

[@larryesmith5060]

Yeah the 92 Fatboy S&S Super G I have done that to it a long time ago ago works good

[@jameswatkins29]

Doc, I just replaced had the engine apart and installed a bypass, cleaned intake and heads, but did not replace valve seals. Just did the 5 minute startup break in on the motor and have oil sitting in intake. Thoughts? Love your content and interview with Baxter!

[@LowCountryHarleyDavidson]

Assembly oil on rings and pistons?….Doc

[@jameswatkins29]

@@LowCountryHarleyDavidson Thank you sir! Makes sense.

[@Big.Ron1]

Excellent ideas. And yes, you must be very careful when working in the intake air path to make sure nothing can come loose and end up in a cylinder or both. Had that happen on a newly rebuilt shovel a long time ago. I got in a hurry putting it together and didn't stake the butterfly valve screws on a super B after re-bushing the throttle shaft. I managed to screw up both cylinders. Not good.

[@rusnsc7622]

This is , great I did the same mod on my 11 FLHTK long ago also did same on my 14FLHR. Filled the throttle body ports with high temp RTV. Works great in both cases.

[@justice13ful]

nice i did this on my sportster. worked good. I was surprised that the arlen ness big sucker had the same route back into throttle body so i cut that sucker off and i sealed it off with rivets and routed it to a breather. good video sir now im gona do it to my streetglide.

[@vanharley5886]

fixed all my oil dripping problem at the cleaner, should have done that when my bike was new!

[@jeanpaullavieille5806]

Thanks for being honest

[@scrumthebum2451]

I did the same mod you did on my twin cam couple weeks ago with set screws & all. I should have done it years ago

[@bloodymarvelous4790]

I'm still not clear on this, and hope someone can help here. Is the breather to relieve crankcase pressure? Or in other words, would a crankcase breather do the same thing? Or should you get both a head breather and a crank breather?

[@phillipternullo4934]

Like the idea of the catch can . Have seen this mod where they run the oil back into the engine . Don’t like that because all engines condensate and if you run the engine hard that oil can get milky and you wouldn’t want that back inside you’re motor .

[@LowCountryHarleyDavidson]

Great Tip....Doc

[@GratefulBamboo]

The best Doc Harley video ever

[@LowCountryHarleyDavidson]

Thank you…..Doc

[@Bushgator]

Doc , can you put a KZbin link below do a video on how to do this step by step? I have a 2015 RK 303 . Thanks for all these great videos you take time out of your day to do

[@LowCountryHarleyDavidson]

Sorry no link but i'm sure there are plenty of videos out there...Doc

[@BenedettoBeano]

Hello Doc, since the last oil change in my original 2017 Street Glide Special M8 I found a lot of oil residue in the air filter box and some drops on the exhaust. Then during a ride in the mountains the check engine light came on, signaling errors P0152 P0522 P0523 The oil pressure was correct in the radio display. The engine oil they had put on me was a 50 mineral, in my opinion, poor quality. I reset the errors replaced with a 100% synthetic 10-60 Motul 7100 Can I put a freer air filter on the original bike? To eliminate these misting problems, I have also seen the Feuling oil dipsticks and the Trask ventilated transmission cover, can they be valid solutions? Thank you for your always very interesting videos, unfortunately I'm Italian, I don't understand everything..😢 🤔 Congratulations 👍👍 great workshop!! Hello from Benedict

[@LowCountryHarleyDavidson]

Ciao my friend. There are many rules in Europe on what you can and can not do to your Harley-Davidson. A “freer” air cleaner will not eliminate the oil mist. There are companies that sell parts to change where the oil/air goes. If you ride your Harley like a wonderful Ducati with a lot of RPM then the aftermarket breathers that attatch to the oil dip stick can be a good thing. Also lowering the oil level to half to 3/4 instead of full helps a little……Doc

[@bluesriderDF]

Nice Doc. I had a bypass on my 1200 Sporty which a previous owner did. I'm thinking of doing it to my '14 Low Rider.