External breather question

graygoat · Apr 13, 2017

I am in the process of putting a DK unit on my 16 Tri with stock AC. I have seen the pics and have the AC figured out. Trying to figure put just where to route and locate the filter. Directions say the black hose should not touch the exhaust or engine. Just how close can the hose be without an issue?

Anybody got any pics of just how you routed the hose from the bottom of the AC to where ever you put the filter (or catch can)? Thanks

DK Custom Products · Apr 14, 2017

graygoat said:
I am in the process of putting a DK unit on my 16 Tri with stock AC. I have seen the pics and have the AC figured out. Trying to figure put just where to route and locate the filter. Directions say the black hose should not touch the exhaust or engine. Just how close can the hose be without an issue? Anybody got any pics of just how you routed the hose from the bottom of the AC to where ever you put the filter (or catch can). Thanks

It can be within 1/4", you just don't want it touching the exhaust or the fins of the engine. If it is the rubber hose (not braided) it can touch the engine cases with no issues.

The ways to route are endless, here are a few pics, and below that, a video.

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In this pic you can see the black hose going between the front cylinder and the front exhaust, then turn down along the side of the regulator and then behind the oil cooler.

In this pic you can see the hose coming from below the air cleaner, along the side of the engine and above the transmission, headed toward the back of the bike.

Kevin

graygoat · Apr 14, 2017

Thanks, Kevin. Duane returned my call this am and we discussed the options. I ran it from the stock AC to the rear, along the tranny and over the frame cross member. The filter hangs right at the bottom of the cross member (near the rear tie down eye). Seems to be out of the way but I can get at it when ever I wash the bike.

Thanks for the help!

Phu Cat · Apr 15, 2017

If you're going to run a really short hose I can see why there's a need to have a filter at the end of that hose. But with a hose that runs back as far as the swing arm is there really any chance of sucking up anything before the next blast of crankcase vapor blasts it back out? With the constant rise and fall of the pistons there has to be some small amount of blow by that escapes no matter how good of a seal we might have, do we really need to worry about anything being sucked back in? A small catch tube of some sort should do the trick, shouldn't it?

PC

DK Custom Products · Apr 17, 2017

graygoat said:
Thanks, Kevin. Duane returned my call this am and we discussed the options. I ran it from the stock AC to the rear, along the tranny and over the frame cross member. The filter hangs right at the bottom of the cross member (near the rear tie down eye). Seems to be out of the way but I can get at it when ever I wash the bike.

Thanks for the help!

Sounds like you chose a great location. If you want to email me any photo's, I would appreciate it, and have them for the next person that asks a similar question. Kevin@DKCustomProducts.com

Phu Cat said:
If you're going to run a really short hose I can see why there's a need to have a filter at the end of that hose. But with a hose that runs back as far as the swing arm is there really any chance of sucking up anything before the next blast of crankcase vapor blasts it back out? With the constant rise and fall of the pistons there has to be some small amount of blow by that escapes no matter how good of a seal we might have, do we really need to worry about anything being sucked back in? A small catch tube of some sort should do the trick, shouldn't it?

PC

The filter is not necessary to keep anything from being sucked in. The breathers only expel, the umbrella valves keep any air from going back in. Even when the umbrella valves are malfunctioning/worn out, so little air goes back in that with any hose longer than 6 inches, nothing will make it back into the engine.

The filter is there so that any residual oil mist will be absorbed by the filter, rather than dripping on the ground. Typically a filter will absorb 3000-5000 miles of blow-by before it can't absorb anymore. They are easily cleaned (without removing them) by simply spraying some cleaner on them while washing the bike, letting it sit for a few minutes, then spraying it off with a hose. Then it is ready to absorb another 3000-5000 miles of blow-by.

Kevin

graygoat · Apr 18, 2017

Hey Kevin, I am not good at getting camera pics done and emailed (or posted). If a phone pics work for you, I could text them to your cell phone. If that works for you, pm me a cell number. Would be happy to do that.

DK Custom Products · Apr 19, 2017

graygoat said:
Hey Kevin, I am not good at getting camera pics done and emailed (or posted). If a phone pics work for you, I could text them to your cell phone. If that works for you, pm me a cell number. Would be happy to do that.

That would be great. You can text them to the company text phone at 662-420-4891

Thank you!!!

Kevin

graygoat · Apr 20, 2017

DK Custom Products said:
That would be great. You can text them to the company text phone at 662-420-4891

Thank you!!!

Kevin

OK, I will try that, let me know what you think. If you think they are worth posting, feel free to go ahead.

thanks

hogcowboy · Apr 21, 2017

DK Custom Products said:
Sounds like you chose a great location. If you want to email me any photo's, I would appreciate it, and have them for the next person that asks a similar question. Kevin@DKCustomProducts.com

The filter is not necessary to keep anything from being sucked in. The breathers only expel, the umbrella valves keep any air from going back in. Even when the umbrella valves are malfunctioning/worn out, so little air goes back in that with any hose longer than 6 inches, nothing will make it back into the engine.

The filter is there so that any residual oil mist will be absorbed by the filter, rather than dripping on the ground. Typically a filter will absorb 3000-5000 miles of blow-by before it can't absorb anymore. They are easily cleaned (without removing them) by simply spraying some cleaner on them while washing the bike, letting it sit for a few minutes, then spraying it off with a hose. Then it is ready to absorb another 3000-5000 miles of blow-by.

Kevin

Just curious as to what kind of cleaner. A brake cleaner? Or a water soluble kind so what?