Harley head breather system FEATURES & SPECS: Fits All Air Cleaner Systems w/ Stand-off back plates; Allows Discrete Placement of the supplied filter; Chrome Washable Reuseable Filter - flexible placement Nov 16, 2023 · All OEM evo harley engines produced from 1993-1999 had hollow bolts to allow the heads and cylinders, which were ALL top breathers If the 98 was running and not puking oil everywhere,, it is not oem harley, as in aftermarket, heads, cylinders, and possibly crankcases, possibly oem crankcases can be drilled using an accurate oil galley locating method, nd tapped for the 1/4" npt fitting Jul 13, 2013 · So I guess I'm a bit confused at who is saying the right thing,what exactly is needed for the top breather setup,I know banjo type bolts are used instead of normal bolts used on the air cleaner bracket on my 91,and umberella valves are used in the rocker covers and I spose i'm wondering if there are blokes use both systems on bikes how are S&S Jun 17, 2019 · DK Custom External Breather System w/ Catch Can Harley Twin Cam FXDC SEPST*HP 81. Mar 30, 2019 · I also vent my head breathers straight to atmosphere, no hoses, nothing. Aug 3, 2022 · You can use top breather heads on bottom breather engines. This is really “a hell of a lot of work” for 1. Just keep the bottom breather plumbing on the bike. The Trask Mystfree Breather Kit – the ultimate solution for upgrading your Twin-Cam engine's performance and keeping it running smoothly. Remove the umbrella valves. ) No oil problems because any mist is blown away in the wind and my top end isn't worn out. Shop the best selection of Harley-Davidson Breather Kits at Dennis Kirk for the lowest prices. Feuling M8 crankcase breathers Harley Davidson Milwaukee-8 . (My solid intake manifold doesn't need a filter backing plate connected to the heads. DK Custom Products . 100 miles before my next oil change I add a couple ounces of seafoam to the oil to keep the umbrella valves from clogging up. Harley did just that in 92. FITS ALL TWIN CAM & MILWAUKEE-EIGHT MODELS. I took a 1/2 to 5/16 threaded reducer and put in my heads then used 5/16 solid bolt to mount my carb/breather bracket to the heads. Mar 6, 2013 · Posey, at one time he was a tech at delkron, said that they actually recommend pluging the head breather ports and just use the case breather My heads are a 1/2 thread I believe. FEATURES & SPECS: Fits All Outlaw & Many Other Air Cleaner Systems; Banjo Fittings at Heads for a Clean Look; Allows Discrete Placement of the supplied filter; Chrome Washable Reuseable Filter - flexible placement FEULING Cylinder head breathers for Milwaukee Eight engines. May 10, 2010 · The part idle system, the venture system the power valve system (or VOS) and the accelerator pump system, all have to be revisited. My choice is to use both head and crankcase breathers Mar 26, 2025 · Uses Your OEM Breather Bolts with Nipples (not included) All needed hardware; Turn-Key System . 4. Harley-Davidson FITS ALL TWIN CAM, MILWAUKEE-EIGHT MODELS & SPORTSTERS. This is because engines like Cold Dry air! Fits All Twin Cam & Milwaukee-Eight Models - 2000-Up Touring & Softail, 1999-Up Dyna. Being curious I check. Can be used as an External Breather System. These breathers are the third component of our new M8 breathing system. Apr 2, 2025 · "The manifold has nothing to do with the engine breather system. Jul 21, 2023 · The Harley Davidson Milwaukee-8 engine comes with a closed-loop breather system. This means that the engine vents positive air pressure, blowby, and oil mist out of the crankcase through the crankcase breathers (located on the right side of the engine) and back into the air intake, right before the throttle body. I can already tell a difference in heat an throttle response. Jul 19, 2022 · DIY Discrete Breather System . May 19, 2024 · With this breather system you will experience a slight performance increase. . FEATURES & SPECS: Chrome Breather Bolts and Banjo Fittings; Washable Reuseable Filter; All needed hardware; Turn-Key System . Step 4 – Run your hose an exit point Nov 13, 2024 · & Flexible Breather System. Feb 28, 2025 · 2. Harley used threaded bushings to reduce the size of the holes so as to use the smaller bottom breather bolts. Harley-Davidson: CVO Road Glide Limited – – 2022: Harley-Davidson: Street Glide ST FLHXST – – 2022: Harley-Davidson: Softail Low Rider ST FXLRST – – 2021: Harley-Davidson: Electra Glide Revival – – 2020-2022: Harley-Davidson: Softail Low Rider S FXLRS – – 2020-2022: Harley-Davidson: CVO Tri Glide FLHTCUTGSE – – 2020-2022 El Dorado Touring Exhaust System Mk45 Touring Mufflers Grand National Touring Slip-On Mufflers S&S Sidewinder® 2 Into 1 Exhaust Systems and Shadow Pipes S&S SuperStreet 2:1 Exhaust System - 50 State Legal S&S SuperStreet 2:1 Exhaust System for 2007-'20 XL Models GNX Slip-Ons S&S Cycle Diamondback 2 Into 1 Exhaust Systems Qualifier 2-1 Exhaust An external breather system works to redirect that oil mist to a secondary location thus increasing the air charge by allowing more air per unit volume but also takes advantage of the coldest possiable air temperature. Imagine yourself trying to breathe with a rag stuck down your throat, and then you pulled it out. For. A Breather Kit is needed to mount many aftermarket Intakes & Air Cleaners. I did Install an external breather kit with catch can almost 2 months ago and was glad that I did after seeing what gets collected with the set up but I am told it’s not a good idea on the M8 motor and that it’s beneficial to allow that nasty stuff to run back in the system. The Mystfree Breather Kit is specifically designed to efficiently drain oil into the rocker, significantly reducing the amount of oil expelled from the head breathers. Fits All Sportsters & Big Twin Evo Models - 1991 & Up. The head breather system requires 1993 and newer rocker boxes and heads. These T-Man M8 Head Breathers are going to help your Harley Davidson M8 motor breathe better by providing double the volume and a better seal to prevent leakage. Oct 7, 2024 · Awesome product. It was developed to help ensure a positive seal on the head breathers, while also providing twice the volume area than the stock breather that comes with your Harley-Davidson. I used the K&N wide oval for the air cleaner an the only reason I did was because I like the looks of the filter. Jan 18, 2023 · E-Z Install. Feb 24, 2025 · The EPA has required Harley to route hot, dirty, oily crankcase air back into the air cleaner compromising the performance of your engine. FITMENT: *If your air cleaner system will accept the Stock OEM breather bolts that have a 3/8" diameter nipple, then this breather kit will allow you to route the hot oily air to the supplied filter that you can place anywhere you like. Easy install. Jul 14, 2020 · Complete Breather System. FREE SHIPPING on orders over $89 – We Ship Today! Jan 18, 2023 · The Harley breather is something totally different. That’s the kind of difference a new Harley breather kit can make for the efficiency and performance of your Harley-Davidson air intake & fuel systems. Big Twin Evo's DK Custom Products . Apr 18, 2020 · I left the factory system intact and when I upgraded the air cleaner to a stage one I kept the crankcase vent connected to the air filter backing plate. Figure 7. Machined from billet 6061 aluminum with square surfaces, promoting excellent umbrella valve sealing, longer main breather exit nipples with dual O-rings to promote better breather system sealing. If you have these then use a 1993 and up S & S Super G and you will have all you need although it probably won't make much difference in power. The crankcase will always have enough positive pressure to keep dirt outside. I had to stuff a small rag into the air cleaner housing to catch the small amount of drip from the breather. Introducing our new T-Man Custom M8 Head Breathers. Braided Stainless Steel Hose. 5 to 2 hp though!! And this is assuming you will even see a “delta” on a carb model because a carb is less responsive system. Using hose barbs and tubing, you can create your bypass system to meet with a "T" joint connection. In the picture below you can see one of many different places you can affix the filter. 49*Stage 1*Rinehart Exhaust*Ness Big Sucker*External Breathers*FL Air Cleaner*Leatherpros FXDXT Bags*Moons MC Moonmaker*Saddlemen Step Up Seat*Windvest*Mobil 1 V Twin 20w50*Amsoil V Twin Primary Fluid*Amsoil V Twin Transmission Fluid Nov 4, 2016 · Wasn't the crankcase (bottom) breather system's stock design stock an internal system? Same as the internal head breather system, except instead of running a line from the cylinder head to the backing plate into the air cleaner, the bottom breathers ran the line ran from the case into the same spot of the backing plate into the a/c. Properly sized breather inlets and location for optimum engine breathing. Since 93 its just a one way valve. Harley-Davidson . It is the Ultimate in Hidden, Discrete, External Breather Systems. 3. Some breather kits use a hard line to connect the two bolts into a single hose barb. Can "Transform" into an EPA (emission) Compliant System. Please look at the additional pictures at the bottom to see how discrete this external breather system is. These billet aluminum breathers are made in-house and have proven to help with oil sumping and blow-by issues. I cut the breather system off the K&N filter an sealed up the ports to internal breather an installed the D&K external breather system. Figure 6. It lets the gasses out, but does not let air back in. PATENT PENDING. An external Breather Kit is preferred with any Air Feb 17, 2016 · A horseshoe breather uses a hard metal line to connect the two and a rubber hose comes off of that. Harley-Davidson Sportster Models 1991- UP . Then use solid bolts in the breather holes at the head. Feuling cylinder head breathers for Harley Davidson Milwaukee-8 engines are machined from billet 6061 aluminum with square surfaces, promoting excellent umbrella valve sealing, longer main breather exit nipples with dual O-rings to promote better breather system sealing Feb 17, 2010 · There has been issues with the S&S head breather system from time to time. Fits Big Twin Evo's. Feb 13, 2023 · The breather system is designed to get rid of that oil/ water vapor and relieve pressure in the crankcase. This vents it without compromising the performance and longevity of your motor. 26*TQ 88. Can be ordered with just a hose, a Filter or a Catch-Can. As the pistons travel down and decreases crank case volume, they push crank case gasses out of the breather ports. With this breather system you will experience a slight performance increase. Fits Most Sportsters 1991 & Up (except XR1200). Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail Jul 24, 2022 · I gotta say I love the bike and so far so good after 11k miles. 5. okt zyblu xpqjgk dktms effxg nxbr embvjn wnmlvw uggo gpit ykoi dqy jdnat ydho tpktq