cf moto 250 oil leak By jenningsjosh (Read 3,083 times)

[jenningsjosh]

Ok I reviewed the tech post by bashan a little more.. and I now see the hose "oil recovery system" that he put into place.. basically if I put a hose there... tie a fuel filter into the top and hang it higher than resivor.. I should be able to reuse that oil? Or is it trash afterwards? This seems easy enough to do and will quit leaving oil marks all over the garage and driveway... I am having to add 1/2 quart weekly... or about every 150 miles or so... I would rather try to reuse the oil instead of wasting it on the ground.. it does get expensive after a while.. and if I can save a few bucks a week that would add up pretty quickly.... I will post some pics before and after I complete

[Alleyoop]

Yes do that BUT if it is always blowing out oil THEN YOU are overfilling it.
Alleyoop

[jenningsjosh]

I am filling it on the stand..level..cold... tell it hits the very bottom of the xxxx on stick wothout screwing it... don't know how I could be overfilling... but what do I know

Question remains.. is the oil reusable? Or is it trash?

[Alleyoop]

If you take that hose and put a Fuel Filter on the end of it and tie it up high on the frame if it squirts out the oil will drain back down.
Alleyoop

[jenningsjosh]

Drain back down into thw engine? Or out the other drain hole? If I clog both... won't it soak my filter and eventually go into carb?

[Alleyoop]

HAHAHA, You take the hose OFF the AIR BOX put a fuel filter on it and tie the hose high on the frame. THEN PLUG up the CONNECTOR on the AIR BOX DONE.
Alleyoop

[jenningsjosh]

You should see the pile of oil from today! My lord.. nothing is showing on dipstick.. and still blowing it out.. could I have a more severe problem? If so.. will be a winter project.. thoughts?

Rode a good 100 miles plus in last two days.. while carrying a passenger..55-60 was average speed

[Alleyoop]

Well if you left the hose connected to the AIR BOX and the filter is full of oil IT DOES NOT VENT and it will blow OIL out. Just do what I said in the above post and if it still blows out then you do have a internal motor problem.
Alleyoop

[borris120]

I have the same intake- I have the flutter valve(nipple) where your mystery nub is. After a flooding incident, I noticed that the excess fuel had made its way to the air filter, then out of the 'mystery nub' via the flutter valve. So that appears to be its primary purpose.
In the second picture top right is from the valve cover, top left is the vacuum source/where the oil vapor becomes recycled back into the intake. There should be a nylon sponge material inside of that little box which is supposed to trap the oil itself to keep it from blowing back into the intake. Where you have the flutter valve, I have a clear hose about 5-6" long with a plug and clamp on the other end. The excess oil builds up in the tube and I can see it accumulate. If/when necessary it reminds me to top off oil if between changes, and if it gets too full, I can just empty the tube so that it doesnt back up into my intake. The tube also allows you to empty the oil into a proper disposal location.
There will always be 'some' oil accumulating in the sponge due to vapor alone, not to mention when you are at WOT and actually suck some droplets in there. Having the flutter valve there will only discharge oil all over your bike and the road. You can get clear tubing of different diameters at your local 'Homa-de-Po'. The plug can be anything from purpose built with a wire clamp, to an appropriately sized bolt. It would suck if it was spraying(leaking) oil and it blew all over your rear tire.

Boris

Alleyoop, with his configuration and where the flutter valve is, i think the issue is that it can't be 'full of oil' because it is continually leaking from the valve. we know that the charcoal fuel vapor filter is never supposed to get wet because it ceases to be effective, whereas the oil blow-by filter is supposed to catch the oil drops and divert them from the flow of air back to the intake. In any event, the solution of putting a standalone breather on the end of the hose, and above the source is a good alternative. The recommendation above is a good way to keep it stock.