The air box is where all crankcase emissions go. Whatever is forced out of the crankcase by a running engine winds up there. On a stuck float, it'll be gas, an overfilled sump, it'll be oil. A tired out motor will have a lot of blow-by from the rings and hence a lot of crankcase pressure, so there will be oil in the air box. Now, that said, there is no reason for alarm. It's not at all uncommon to have oil in there. They should have what is called a "liquid separator" to perform the function of separating the oil from the vapor. The oil is either returned to the sump or stored in a small container. The vapor is re-circulated the same way a car emissions system works. It passes back through the engine. I'm going to visit a parts site and look at what is used on your bike. It may be that the thing uses a container system and needs to be emptied. The larger bikes store the liquid component of crankcase vapor in a long tube that ends under the bike. It needs to be emptied from time to time. Failure to do so will cause a condition as you describe. I'll get back to you in about an hour. What makes questions like yours hard is I'm not there. I can't see what you have and all the details.
--- On Thu, 4/23/09, Angela <[email protected]> wrote: From: Angela <[email protected]> Subject: [Nighthawk Lovers] Re: gasoline leak? To: [email protected] Date: Thursday, April 23, 2009, 4:15 PM Dennis H, okay I just changed the oil. Haven't ridden in a few days(too chilly). Checked the airbox last night and it has quite a bit of oil in it. Why is this? What do I do now? I just not too long ago put a new foam air filter in it as well. Why is it sometimes the airbox will have gas in it and right now it has oil in it? Am I in trouble. From: Dennis Hammerl <[email protected]> To: [email protected] Sent: Tuesday, April 21, 2009 10:55:46 PM Subject: [Nighthawk Lovers] Re: gasoline leak? Please check the oil. There is no connection between putting gas in the tank and gas in the air box. Unless... it's getting into the sump and the overfilled sump is being pumped out into the air box. How does that happen ? Stuck float valve in a carb is a good place to start. It flows into the carb throat and down past the rings, over fills the sump and the running motor provides the pressure to push it out... where to ? just where the breather goes to..the air box. . --- On Tue, 4/21/09, Robert N <[email protected]> wrote: From: Robert N <[email protected]> Subject: [Nighthawk Lovers] Re: gasoline leak? To: [email protected] Date: Tuesday, April 21, 2009, 12:11 PM On Mon, Apr 20, 2009 at 1:09 PM, Angela <[email protected]> wrote: Can anybody tell why I have gasoline going into my air filter? I asked before and thought it was because I was over filling the tank. But apparently that is not the case because my bike is running out of gas and then only restarts when I put the petcock on reserve. I noticed also that on the right side under where the carbs are there seems to be an opening. A very short rubber hose type opening that I nver noticed before that had gas leaking out of it(or what I think is gas) when I start it up. I had noticed the leak before but not the rubber opening. This leaking seems to subside once the bike is warm. I have had the bike a little over a year now and haven't ridden it that much(not quite 1000 miles) with still learning and all. So consequently, I haven't been getting the correct mileage out of it at all. So 2 things: when I put gas in it filling up or not, it seems to flow into the air box and it also flows out of this newly discovered rubber opening. I can't tell if something is missing and this opening should be covered or if the opening should be there or what the deal is. Please can somebody help?? Angela '93 NH 750 -- Rob N --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
