I'm pretty sure it was SBates who pointed me toward the Kury extended breather bolts some time ago, and after seeing this thread recently finally got around to ordering them. My existing setup was the standard SE backplate/filter. I am running a Rushmore cover on my '11 (just because I like how it looks better than the football) and the forum member I had ordered it from also sent me the stock Rushmore backplate and breather setup. So I wanted to do a breather bypass using the Rushmore tubes, rather than drilling my SE backplate.

I got the kury breather bolts today, and here's what I came up with for a breather bypass setup:

The Rushmore tubes are slightly too short to run over the top of the SE backplate comfortably, and I preferred an 'under' hose run anyway. So I picked up a few feet of line (I think it's 3/16" id) and a couple barbed couplings (also 3/16", same size as the stock "T" that comes with the Rushmore tubes). Used the couplings to extend the length of the Rushmore tubes, and brought them to the "T" under / behind the backplate. Turned the "T" about 120 degrees so its' a "Y" pointing somewhat forward. Then ran the rest of the tubing behind the pushrod tubes forward to the frame, then down to underneath the bike. Came out just about how I wanted it. Spent about $10 total on the tubing and the fittings, $15 for the breather bolts on Amazon.

Hope you don't mind all the pics....

Edit: apparently none of the pics uploaded. Grrrr.

Edit 2: re-did the pics.



breather bolt comparison:<br/><br/>Left: SE backplate kit bolt<br/>Middle: Kury extended breather bolt<br/>Right: stock Rushmore bolt



Kury extended bolt just barely threaded into head. Looks like enough thread for a solid attachment to me.



Rushmore tubes with barbed couplings attached



lines extended and tucked behind backplate



Whole thing hides pretty well behind the Rushmore cover.



Front view.

 

So is that a cover you fabricated at the base of the pushrods?
I pulled off my SE intake and put the stock one back on but changed the element to a K&N and there's zero drop in power. Ran the tubes inside of the stock air box, drilled a hole toward the back of the air box and inserted a grommet and ran the hose through that and behind the trans then out through the bottom of the frame. The hose points down at about a 45 degree angle so the air rushing past creates a vacuum and helps pull the vapors out; similar to how the intake would pull a negative pressure through the tube in stock form. Nice job on your breather!

 

Looks great! I like how you routed the tubes downward. Seems like you had a few threads for it to be sufficient correct? Also, from your pics, it looks like there is no need to block off the holes on the backing plate due to the kury bolts once tightened seal that area off. I am sure hoping this will work the same with the big sucker.

 

Do the rushmore tubes just pop on the kury bolts?

 

Thank you!

I had considered trying to just use the whole Rushmore airbox, but I'm not sure it is fully compatible with my pre-rushmore bike. I have kinda had this idea in my head anyway, so figured it was worth it to give it a shot.

I've got my 'drip' hose pointing down at roughly 45 degrees as well. Shoulda put that pic up.

There's no cover at the base of the pushrods - I think the pic kinda looks that way due to the wonky lighting. The vent line is lightly zip tied to the low point of the wiring harness for the throttle body to kinda tuck it back a little - the hose just runs from there behind the tubes. Just kinda blends in.


Yeah, the pic doesn't really do the amount of threads justice - I actually added a washer between the bolt head and the back plate, and still had probably 3/8 to 1/2 inch of working thread. The Kury bolts don't vent to the hollow area around them, so that space and the old vent 'tubes' in the back plate are just dead air. So I didn't do anything to plug them - didn't want to risk having anything in there that could potentially get ingested if it came loose, since it didn't appear to be necessary.

Only thing about the breather bolt switch I wasn't sure about was proper torque value. Stock setup on my bike calls for like 21-25 ft/lbs (276 in/lbs was the middle of the spec, anyway) for the breather bolts, but the SE kit calls for like 135 in/lbs (IIRC - it was significantly less, anyway). I wasn't sure if the lower torque value on the SE kit was due to the O-rings sealing the breather 'tubes' in the backplate, or if the higher value for stock was due to the plastic rather than metal backplate. I went with the lower value, and they seem solid. I'll be keeping an eye on them.

Yep, same size ball on the head of the bolts, plug and play.

 

Thank you for the info. I will be doing this mod as soon.....

 

I'll be rerouting my hoses this weekend as well. I don't like them going up over the intake but I was in a rush to get it done and didn't have enough hose.
DANDRUMHELLER thanks for the pics.

 

I ordered a external breather kit from DK Customs, Kuryakyn extended breather bolts from Amazon, and the Rushmore breather tubes from Harley. Everything came in except the Rushmore breather tubes, figures. Anyway, I installed the kit today without the breather tubes. Came out fine. Thanks to all who posted in this thread and those who helped me.

 

Now you're making me rethink my approach. That DK kit with the catch can / filter looks great, and running them straight off the breather bolts means no drilling the back plate. Doesn't appear to me you need the Rushmore tubes!

Nicely done.

 

Collected the parts needed, Rushmore tube, longer breather bolts, couplings and tubes. Lined everything up at he back of the backplate pointed the "T" between the jugs to the other side. Then between the inner primary and the cases to the underside. Attached it with a tyrap. No filter. No oil till now, only air. Easy and no drilling. Tube used 1/3, 8mm about.
I have a SE breather.