| Author | Message | ||
     Wbrisett |
In servicing my Uly this weekend, I found some oil in the air filter area. Not a lot, but enough that I wiped it out and started to wonder how much oil in the air filter area was OK. More importantly I wondered where it actually came from. Wayne | ||
| Reepicheep |
It's from the crankcase breather lines. As the pistons move down into the crankcase, they need to displace air in and out. That releases a fine oil and moisture mix people call "spooge". Some people feel strongly about not letting that stuff back in their motor, and add a catch can instead. Others don't see how a teaspoon of spooge every 1000 miles is going to make any difference to their motor, particularly considering that the same water that is in the spooge is in the air your motor breathes anyway. Others (count me in this camp) did the re-route, but got tired of dealing with the mess it made to do so, and were happy to go back to stock. | ||
| Andymnelson |
....and yet others (count me in this camp) did the re-route the right way and don't have any mess....actually less than stock since we don't have to deal with the mess in the airbox, and are happy to leave it re-routed.  | ||
| Hughlysses |
I was formerly in the "I don't see what the big deal is" camp, but after I saw the deposits in the rear intake port of my 07, I'm a believer. There was nearly 1/4" of build-up of baked-on spooge in areas of the port and on the intake valve and I don't know where else it could have come from. | ||
| Schwara |
Andy ... which version of the re-route (components & path) did you do? I added a catch can made from the water collection filter from an air compressor along with a stainless filter to open the airway and it works pretty well, but I'm curious what you did if you are that happy with it? After adding the tail-tidy I'll be looking for other projects over the winter. | ||
| Reepicheep |
Not to hijack the thread Andy... but did you really manage to do it such that you don't have an oily mist settling on either you or the bike wherever the breather filter / vent sits? | ||
| Uly_dude |
Wayne, when you say "air filter area", do you mean inside the filter, or outside? If it's inside, it's the spooge from those two crankcase vent tubes. If it's outside, like under the filter cover, then you got other things happening. I once had oil outside my filter when I had oiled up my UNI air filter too much, causing some excess to pool up in black plastic filter base. | ||
| Andymnelson |
Sure did! I really need to do a write up on my setup, as I feel its the only way to go. I ran the vent tube back up through a hole in my air box base plate (outside the filter) and installed a small filter on it. No oil makes it that far up, so I don't get any extra oil in the air box. Because the fumes get sucked into the intake, I don't get any fuel smell. | ||
| Wbrisett |
Uly_dude: The oil is in the box, with 99% of it inside the air filter. I did notice trace amounts of reside inside the breather box itself, but that's to be expected based on what folks are saying here. Thanks folks for the feedback. Andy, when you get your writeup done, I would love to see it. Sounds like a project I should tackle as well. Wayne | ||
| Reepicheep |
I see. So you effectively added a catch can to the existing "feed it back into the intake" setup. That solves a lot of problems, but does let you keep a bit of spooge out of the motor. Sounds like a nice compromise. Why not take it a step further, add the catch can with extra tubing to a low point on the bike, but leave the rest of the routing as is and going inside the filter. Then you don't even need a filter on the vent lines. | ||
| Motorbike |
I ran the vent tube back up through a hole in my air box base plate (outside the filter) and installed a small filter on it. Andymnelson, did yours look like this?:  I had mine set up the way you described (I think) and I could always smell hot oil fumes on hot days. When I went back to stock, no more fumes at all. None. I'm thinking I was getting some type of low pressure area behind the windshield that may have been drawing these fumes out and up towards my helmet? Not sure about that but I don't miss the fumes at all now. I'm surprised my wife did not complain about the smell! Thanks. | ||
| Jphish |
If I remember correctly, Oil in the airbox / filter area can also be caused by over filling crankcase. Mine used to do that until I started only filling to the "2X" on dipstick. The oil was 'clean' oil - not spoogey stuff. | ||
| Portero72 |
Wayne- Next time I see you on a Thursday, I'll show you mine(my what???). It is a very simple mod. But you have to let me ride your bike after the 9 primary conversion. Deal? | ||
| Wbrisett |
Deal... I was going to do the swap this past weekend, but since I work outside and it was raining, I didn't do the xb-9 primary swap. Although, I didn't mind the rain since we haven't had any in months! Wayne |
