When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
That is an A/C I've not seen before. It looks like it's running the 5 7/8" K&N and venting internally but those bolts mounting to the heads are going to be an issue.
What make is that A/C setup? I'd like to check it out so I can see what we can do...
It almost looks like those are the breather vent hoses coming off the standoffs. May be as simple as relocating the hoses, and sealing off where they dump into the intake, but need more detail. As Tin asked above.
That is an A/C I've not seen before. It looks like it's running the 5 7/8" K&N and venting internally but those bolts mounting to the heads are going to be an issue.
What make is that A/C setup? I'd like to check it out so I can see what we can do...
Odd design... Simple fix. What I would do is disconnect the two breather hoses. Put two bolts with LOCKNUTS in the two holes the breather hoses entered the air cleaner through. Use new hose to run down and under the air cleaner using a vent solution. Filter, T fitting to a hose to the ground, etc.
Odd design... Simple fix. What I would do is disconnect the two breather hoses. Put two bolts with LOCKNUTS in the two holes the breather hoses entered the air cleaner through. Use new hose to run down and under the air cleaner using a vent solution. Filter, T fitting to a hose to the ground, etc.
Or buy a new assembly.
Exactly that
I was just now reading the install instructions at the Cobra website and you're spot on, Mchad.
Govno, I've done quite a bit of experimenting with different external breather setups, I'd recommend you run the new breather hose to a filter or catch can. I've had my breather hose run under the bike on different occasions and noticed a bit of oil splatter on the underside of the bike and she'd drip on the garage floor while sitting on the lift. I didn't care for the oil possibly getting on my rear tire while riding so I used a push on filter.
I found that the oil didn't evaporate out of the filter as well using longer hoses and the filter under the bike; the setup I pictured on the previous page has been working the best. The hoses are shorter and I believe the oily gas doesn't have nearly the chance to condense before it's in the filter in the air flow as the bike is being ridden.
I do have a problem of more excessive carryover and venting with my 103"; I'm lucky like that I have some Trask Mystfree breathers sitting here and I'm going to pull the rocker covers and the rocker support plates and install the Mystfree's and open the support plate oil drain holes. If your bike isn't too excessive you may be able to run a longer hose and filter under the bike or perhaps need no filter at all; it will depend on your specific bike.
Follow Mchad's advise on blocking the A/C's backing plate, you should be able to find the proper sized hose and a T fitting at most hardware stores or auto parts stores. I've never had luck finding breather filters local and get them on Amazon. If you do want to use a catch can DK Custom has a sweet looking chrome can on their website.
Good luck and be sure to post back with your results and an image of how your mods worked out
The A/C you're showing has the standoffs as part of the backplate; like most A/C's it was intended to be EPA compliant. In this situation you'll need to drill and tap the standoffs and use hose barbs. My A/C is a DK 587 that uses a support bracket and was designed to be used with external breathers as was always intended.
The kit you've linked to won't actually work, the standoffs will need to be drilled with an 11/32" drill bit and then tapped with a 1/8" NPT tap for the hose barbs to be installed. Due to the design you'll need to use RTV sealant to close off the holes that will be left in the backplate when you remove the lines feeding in to the A/C.
Good news is DK Custom has the barbs, drill bit, and NPT tap you'd need. I'd contact DK and have them put a custom DIY kit together so you can vent externally with your current A/C and still get the look you want with the kit you linked to... They'll get you squared away; they're the best!
Hey TinCup thanks for taking time and detailing a response to this. I almost bought the wrong kit. Okay so it looks like Ill be drilling and tapping into the harley back plate tube/mounts (actually scream eagle Plate Kit-29319-08) then screwing in breather bolts and connect hoses that will lead to a mini inline filter- or Y to a mini end filter. Her is a question tho- wouldn't it be better if this filter was positioned higher than the AC so it wont collect oil? gravity falls right? so any oil that is spit into the line should roll back before hitting the filter if mounted above? if this mini breather filter is mounted somewhere lower im guessing the discharged air will push oil down and collect and eventually clog the mini filter. Just speculating since ive never tooled with these kits yet.
...Oh wait, I see where your taking about the catch-can instead of a filter but still wondering if a higher mounted filter is better?
Thanks again man yer the best
-Rich
Last edited by RAS2011; Jul 31, 2016 at 06:40 PM.
Reason: Tiepoos
The idea here is you want it to collect the oil/water/vapor coming out of the engine in the filter to be evaporated as quickly as possible With a high mount filter that slurry will want to run back to the engine. The engine is hot enough to keep it as a vapor, once in the external breather is begins to condense, with a high mount filter it runs back to the engine to start the cycle again; keep your external breather hot, short and low to vent it as quickly as possible...
Edit: this was the absolute shortest I could keep my lines to the filter to vent that vapor out as fast as possible. I have no oil collect in the filter, it doesn't have time, it's vented/evaporated too fast. If you wrap your hand around the filter with the bike running you can feel how much air from the engine is moving through it...
Last edited by TinCupChalice; Jul 31, 2016 at 07:02 PM.
I have the Ness Big Sucker back plate, would it require any modifications to add the DK system? I have been dealing with this oil issue for a while and I know its not because of extra oil in the system.
Here again, the Ness Big Sucker is EPA compliant which means you'll need to drill and tap the backplate standoffs to vent to atmosphere. DK does have a DIY kit HERE
You'd need to drill the standoffs with an 11/32" drill bit and tap with a 1/8" NPT tap so you can use hose barbs. If you don't have the correct bit and tap you can order them from DK as well. The holes in the backplate can be closed off with RTV or bolts, washers, and locknuts. Once the barbs are in place you can vent externally to a filter, a catch can, or drop a hose under the bike.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
I have some Trask Mystfree breathers sitting here and I'm going to pull the rocker covers and the rocker support plates and install the Mystfree's and open the support plate oil drain holes. If your bike isn't too excessive you may be able to run a longer hose and filter under the bike or perhaps need no filter at all; it will depend on your specific bike.
