| Author | Message | ||
     Roswel |
I know this topic has probably been beaten to death but alot of the responses refer to oil in the airbox to be normal but excessive oil is a problem. can someone please define "excessive"? also can someone summarize the causes of "excessive" oil in the airbox, do not include over filling. kinda new to this so be gentle and very specific. thanks. | ||
| Reepicheep |
So you have a 2006 XB9R, with stock breather routing back into the airbox, right? Mine is just kind of oily everywhere that is inside the filter, nothing standing. Excessive oiling could be caused by too much oil (its got to go somewhere), or excessive blow by across the piston rings. Something funny with the rocker box / umbrella valves might cause it as well, or bad routing of the breather lines. What is your procedure for measuring and adding engine oil? | ||
| Roswel |
my procedure is the proper way. warm the bike up, take my level reading (side stand, level ground) add as required. my level is not the issue at all. if it was blow by or any of the other stuff how could I diagnose it? routing of lines is stock although airbox is not. i've opened it up keeping the lines stock. i have drips of oil on the cover over the filter. when i start the bike sometimes oil is spit out of one of the breather lines. i know this because my filter cover is clear plexiglass and i've watched it happen. it seems alot to me but then again this is my first bike and i have no comparison other than my friends 03 XB9R which has absolutely no oil going into the air box. it's bone dry. | ||
| Reepicheep |
The solution is obvious then, put on a non clear cover  I am out of my depth here in terms of experience, but I would think a leakdown test would be able to diagnose excessive ring blow by. My oil box is fairly wet. If you are not consuming excessive oil, I would just be happy to know my top end is plenty well lubed and just ride it. | ||
| Lightlong |
I had a similar concern with my xb12Ss. I found a little oil on my air filter and had my dealer check it out. They said that after the bike sits for a long period of time (i.e. a winter hibernation), a little oil spitting out onto the filter can be normal and nothing to worry about. I would say my filter had about 10 - 20 drops of oil in it. There was also some oil residue around the velocity stack. I have been led to believe this is normal. | ||
| Mesa_cityx |
Catch Can Time! | ||
| Clutchless |
Oil past the breather umbrella valves would make it spit up oil out the intake into the filter area. This is characteristic of cold oil and high rpm's. Picture this...... I'm oil in your crankcase (waves to cams...oil pump....lotsa other homeboys hanging out) I get walkin thru the oil pump and past the engine and back into the crankcase so damn fast I'm not even walkin anymore I'm damn near running. So you get that source of the feeling of momentum in the flywheel and parts of your motorcycle start to almost part the ocean of your oil system if you will. But when all that oil is cold and going fast thru the maze of breather valve and rocker arms in the top end of the motor it over loads the umbrella valve and the nylon sponge thing that stops it from more coming out. High RPMs for long periods of time can cause this to happen more than often I'm afraid to say. So does anyone like to cruise at 90 mph? make sure its warmed up reallllllly good (over 180 degress f). So long story short, if you started your bike and reved any rpms to the point of spinning and oil pressure while it was cold oil it may have pushed a little bit of oil into your breather valve assembly. Its normal blowing oil back into the intake anyways but sometimes it just gets a lil more than it can handle and it takes a long time for it to clear out unless you take the top end apart down to the heads and clean it out. This is a MAJOR complaint at my dealership on sportsters. ONE SURE FIRE WAY TO CURE THIS PROBLEM. warm up your motorcycle, its your baby of course. It worked on my evo sportster and my rubber mount sporty. So far so good on the Buell Like mesa_city said, its catch can time. (Message edited by clutchless on August 11, 2007) |
