modified airbox drain tubes

[JACoH]

So, I decided those short little drain tube plugs coming from the air box were a bit of a hassle. They don't really hold much oil and are a bit fiddly removing. So, I got about 6 inches of 5/16" tubing and connected each end to both fittings. It holds more oil, is easier to see, and is easier to remove when necessary to clean out. (Didn't have much oil in bottom of air box, but I'm waiting for it to seep down through the center seam. Cleaned it, now pondering an easy replaceable foam pad for the bottom.)

 

[Dinsdale Piranha]

Perhaps, rather than re-working the tubes from the air box, why not simply re-route the appropriate vent tubes going into the air box. I'm assuming that we're talking about the engine sump vent and possibly the Tx vent too. If you add an extension onto said tubes so that they go as high as possible underneath your tank (right up to top frame tubes if you can) and then all the way down to somewhere convenient between the rear of the Tx and in front of the swinging arm pivot, and hence off atmosphere. All vehicles were this way for a hundred years or more - and it worked a-treat!

Btw, the fact that there's oil gathering in your air box (assuming it's all running fine otherwise) says that the offending oil reservoir (usually the engine sump) has too much oil in it. There was another thread somewhere in just the last week or 2 where exactly this was covered. Reduce the amount of oil by small bits until it stops pumping oil out. The rule is that the oil level must be above the bottom mark, not up to the top mark. This is a very common problem across all makes and many models of bikes. My other bike is a DR650, and it's a perennial problem on them too and these fixes work fine on the DR also.

 

[JACoH]

Thanks DP, my next step is looking at rerouting the breather tube going into the airbox, maybe a small catch tank or filtered, extended hose. I've been watching the tube things and just decided to clean and observe after 4000 miles, and I would guess not more than an ounce was in there. Not too bad. I will keep a watch on levels.

 

[jpv7]

Thanks DP, my next step is looking at rerouting the breather tube going into the airbox, maybe a small catch tank or filtered, extended hose. I've been watching the tube things and just decided to clean and observe after 4000 miles, and I would guess not more than an ounce was in there. Not too bad. I will keep a watch on levels.

My V7ii was always putting a bit into the airbox, even when not overfilled. Annoying, and i don't think it's great for the intake system either, but that may or may not be correct.

I disconnected the line going to the airbox, and capped the airbox fitting. Just venting that line to atmosphere will make a bit of a mess, so i found a small bottle called a PCV Enhancer. Basically a small clear bottle with metal balls in it. I connected the line that was going to the airbox, and the other port of bottle vents to atmosphere. Secured to the frame and tucked out of the way. I will clean it out once in a while, and now airbox is spotless.

 

[JACoH]

I have been looking at that PCV Enhancer but was trying to determine where to mount it. I thought maybe IN the airbox, if it doesn't restrict anything. Can you add a pic showing your location of it?

 

[jpv7]

Will try to get one posted. Don't put it in airbox. Tie wrapped mine to right side vertical frame tube right beside cover. I want to replace the tie wrap with a rubber strap of some sort so the frame paint is not damaged. So far so good though.

 

[jpv7]

I have been looking at that PCV Enhancer but was trying to determine where to mount it. I thought maybe IN the airbox, if it doesn't restrict anything. Can you add a pic showing your location of it?

I took off the tank and re-routed the vent line between the 'V' intakes so that the line goes straight into bottle. Magnum is the manufacturer. misting in the bottle is about 2500 km worth of riding. As i said i want to get a rubber strap to hold this instead of tie wrap.

 

[Raven]

Great info. I'll be looking into one for my Norge.

 

[JACoH]

I ordered mine off ebay for $46.00 including shipping. Nice install, thanks for pics.

 

[JACoH]

And to help mount them, I found some rubber frame buffers on ebay, as "RM shock bottle" rubbers.

 

[Midnite]

Rather than purchasing the PCV enhancer, I decided to use an old spice bottle to create a simple overflow container. I went out to my local auto parts store and found a brass fitting with a threaded opening on one side and a smaller 'nipple' on the other. I disconnected the line from the sump to the airbox and used a vacuum cap to block off the port on the airbox. I then screwed the brass fitting through a hole that I created in the cap of the spice jar, and then into the line going to the sump. The jar screws directly onto the cap and is secured to the frame with a silicon/rubber velcro strap that I found at a local RC/hobby shop (commonly used to secure batteries on drones). Any time I have overflow, I can simply take off the strap and unscrew the jar to empty it.

 

[Mindis]

Thank you, Understood, I am not removing the air box. I saw in the parts list the stock blow-by air/oil separator housing and that the hose that terminates at the airbox is a vapor hose from that housing. Yes I have also read that keeping the oil level low is the solution. However I have found in life that it is always a good idea to design in a margin for error. To remove the tank which as I understand it requires the eagle badges be removed just to in turn remove the air box to change the broken drain hose seems as good a opportunity as any to add the second air / oil separator complete with its own drain hose. That said I could be wrong as I am always learning

Tank comes off without any hassle, same mounting system as majority of bikes.
As of airbox oil drain, I don't think it's worth start messing with oil catch thingies... All it'll do is will add unnecessary weight and complexity, just to save 10mins to drain them 2 drops once a month. Don't get me wrong, I'm all about innovating and modifying and spend lots of hours on things that have a bare minimal impact but even I wouldn't waste time on it LOL
I keep my oil level in a dead center between the marks and there's literary only 2-3 drops of oil per month'ish while me clocking in nearly 1K kms a month.