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October 25th, 2010, 02:51 PM
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#1 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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1993 250 gas/oil mix sprayed into airbox?
I just got a 250. The guy told me there was a gas leave. Upon further investigation, there is a gas/oil mix being sprayed into the airbox via the tube in the picture located here: http://www.facebook.com/photo.php?pi...00000108102173
does anybody have any ideas? i think thats the cankcase breather tube, and knowing car engines, nothing should be sprayed thru this tube. It does it above 6k+ RPM |
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October 25th, 2010, 02:59 PM
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#2 |
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Join Date: Nov 2008 Posts: Too much.
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yes, that's the crankcase breather tube.
is your engine oil level at the correct height in the sight glass? |
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October 25th, 2010, 03:19 PM
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#3 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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at this second idk, i will take a look when i get out of class. have any other rough ideas? even if oil is a little high, why is there gas coming from it also? i will check the oil also and see if there is gas mixed in the oil.
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October 25th, 2010, 03:34 PM
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#4 |
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Join Date: Nov 2008 Posts: Too much.
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how do you know gas is already mixed with the oil that's in your crankcase? if you're going from what you find in the airbox, there's always gas already in the airbox to some degree. perhaps what you're seeing is a gas/oil mixture in the airbox from crankcase oil being blown into the airbox and mixing with the gas already there?
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October 25th, 2010, 03:42 PM
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#5 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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i took the airbox off and ran it with the tube disconnected, and it was gas/oil mix coming right out of the tube. there is also a very small amount of smoke from the exhaust
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October 25th, 2010, 03:50 PM
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#6 |
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Join Date: Nov 2008 Posts: Too much.
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if it is indeed a gas/oil mixture in the crankcase, I highly suggest you do an oil/filter change ASAP. Gas can get into the crankcase if the float valve in the carbs do not seat/close properly and allows gas to rise in the carbs and overflow down into the cylinders, past the rings and into the crankcase.
you would see a rise in your oil level in the sight glass, which was the reason for my original question. also, oil can be blown up that crankcase vent if the crankcase is overfilled with oil. my gut feeling is that your bike was overfilled during an oil change done by someone who didn't know how to properly fill the bike with oil. |
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October 25th, 2010, 04:15 PM
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#7 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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i will change it asap. if gas gets passed the rings, a rebuild is in store correct? i know the carbs need rebuild, because the bike will only run in choke. but as for getting it started, i lost my set of keys and only had one key, so i need to change out all the locks.
whats the proper way to remove the ingnition cylinder without tearing anything up? the handlebars are also locked on the bike this motor is also a wet clutch correct? |
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October 25th, 2010, 05:14 PM
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#8 |
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Join Date: Nov 2008 Posts: Too much.
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no rebuild needed. just don't run the bike until the oil has been changed, then fix the carbs.
but again, are you sure the PO just didn't overfill the bike w/ oil? you're making a lot of assumptions here unless you are positive it's gas in the oil. you need to get/find a service manual for your bike to work on it properly. |
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October 25th, 2010, 05:22 PM
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#9 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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i work on cars, but new to bikes. im positive it was a gas oil mix. smelled like gas, and was the substance of oil, just a tad bit lighter and thinner.
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October 26th, 2010, 02:52 PM
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#10 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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I will be removing the carbs tomorrow and following the carb cleaning guide on ninja250.org
i will also check the sight glass. If there is gas mixed with the oil what should I do with it? I have never had this issue with a car... |
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October 27th, 2010, 09:44 AM
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#11 |
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ninjette.org certified postwhore
Name: Frugal
Location: Dallas/Fort Worth (DFW)
Join Date: Mar 2010 Motorcycle(s): Several Posts: A lot.
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As far as disposal, any oil change place should take it no problem. Their oil tanks are ventilated so the volatiles will evaporate away anyway. There won't be much.
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October 28th, 2010, 05:34 PM
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#12 |
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ninjette.org newbie
Name: Brandon
Location: Louisville, KY
Join Date: Oct 2010 Motorcycle(s): 1993 Ninja 250 Posts: 8
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i actually recycle my own oil. i have a bunch of 2 stroke and small mower motor powered toys, so i resue oil in them.(iv got about 4 lawnmower motors, 5 weedeaters, and a few riding mower motors). ill put the motor on something and play till it blows up, then scrap the block lol
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