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Discussion Starter #1
So I recently changed the oil in my rebel 500 and now I have noticed twice now that there is a small puddle under the drain tubes that smells and feels like oil. It is definitely not coming from the drain plug or the oil filter it is directly under the drain tubes. Could I have done something wrong during the oil change to cause this? It has only done it twice with probably 10 rides total.
 

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I checked all over the bike and cannot find a leak anywhere and I would imagine if it was leaking from the engine I would smell it burning the drain tubes looks pretty dry too so I have no idea where it is coming from or why it only does it on certain occasions.
 

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88,

Without a shop manual I am uncertain where the oil is coming from. My best guess the oil is from a Positive Crankcase Vent. If so there is nothing to worry about.

Kenny G
 

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What climate are you riding in? This could be water condensation mixed with oil coming from the crankcase vent. Does the spot evaporate eventually?
 

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This is what it looks like.
when you filled your oil most recently, did you change the oil filter?

do you know how much oil you put in the bike?

to me it looks like the bike has been overfilled with oil and its coming out the overflow tube. Its not extremely over filled, but enough so that as the oil warms up it splashes up into the overflow tube and as it rests slowly drips out.

if you changed the oil without changing the filter, and put a full 3 bottles of oil into it, you put like, 1/6th or 1/9th of the bottle too much into the bike.

that'd be my first guess.

if you did change the oil filter and the oil, then i'm not sure what you did differently this time versus the previous time you changed the oil. maybe you didn't let it drain out completely?

oh edited cuz i re read the original post and noticed you said its directly below the drain tube and not the plug...

one other thing... there's another tube down there with a plug in it, maybe its full of stuff and needs to be cleared... might be causing too much pressure and squirting some oil out the overflow...
 

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I'm in a very hot climate, southeast Georgia. I changed the oil and filter about a week ago and put 2.9 qts of oil in it. I think the heat has something to do with it because it never does it at home, I've only noticed it when I park somewhere and leave it where it is directly exposed to sunlight for an extended period of time. I parked there this morning and went to leave 9 hours later so I don't think it was going to evaporate
 

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I'm in a very hot climate, southeast Georgia. I changed the oil and filter about a week ago and put 2.9 qts of oil in it. I think the heat has something to do with it because it never does it at home, I've only noticed it when I park somewhere and leave it where it is directly exposed to sunlight for an extended period of time. I parked there this morning and went to leave 9 hours later so I don't think it was going to evaporate
I know the manual says 2.9 quarts, but mine didn't take that much (2.6 to 2.7 actually), and I waited until it had completely stopped dripping before putting in the new stuff.

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I just changed my oil too and mine did not take 2.9, more like 2.5. Make sure the bike is level and give it time to level off in the sight glass as the level of oil is not immediate when you pour it in.
 

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I have been having the same issue, it only happens when I park my bike outside in the sun behind my office bldg. I was reading some other forums and they said that its gas which evaporates in the tank due to the heat and then the condensation is what comes out from the overflow tube. I cannot confirm this as I am new to all this, but if any experts in this forum can confirm that.

found this on a CBR500 forum, which is the same engine on the rebel:
A little gas coming out overflow tube. - Honda CBR500R Forum : CB500F and CB500X Forums
 

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I have been having the same issue, it only happens when I park my bike outside in the sun behind my office bldg. I was reading some other forums and they said that its gas which evaporates in the tank due to the heat and then the condensation is what comes out from the overflow tube. I cannot confirm this as I am new to all this, but if any experts in this forum can confirm that.

found this on a CBR500 forum, which is the same engine on the rebel:
A little gas coming out overflow tube. - Honda CBR500R Forum : CB500F and CB500X Forums


This could be it, except OP described the puddle as oily and says it doesnt evaporate. Gasoline and water would evap...

Tho this may be your issue.




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I have been having the same issue, it only happens when I park my bike outside in the sun behind my office bldg. I was reading some other forums and they said that its gas which evaporates in the tank due to the heat and then the condensation is what comes out from the overflow tube. I cannot confirm this as I am new to all this, but if any experts in this forum can confirm that.

found this on a CBR500 forum, which is the same engine on the rebel:
A little gas coming out overflow tube. - Honda CBR500R Forum : CB500F and CB500X Forums
I have the same exact thing happening. When my Rebel is parked in the garage, nothing, but sitting outside in the sun all day, I get a little oil spot just like the picture from the OP. My oil level is fine, if I stand it up the oil is in the middle of the sight glass. I would assume its nothing to worry about, but it is curious that it only happens when sitting out in the sun. While running its not spitting out oil.
 

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I have the 500, I bought it brand new from the shop. I now have reached my first service km which is 1000km and noticed the exact puddle under my bike today for the first time. It was directly under the middle black tube.

I think this has to do with the heat as today was sunny and hot out and i left my bike outside on the rooftop parking at my work place. After 8 hours, when I came back the puddle was there and it was a mix of oil and somewhat of a water.

My bike is brand new and I have maintained it really well, oil/coolant are all filled properly and never been dropped. So if my bike those this when it is pretty much brand new, I think it's just the condensation in the crankcase or something like that. It was not gas for sure as there was not a hint of gasoline. Also nothing drips when I park at home under a roof, not exposed to the sun.

I will find out more when I get it serviced!
 

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It is normal for condensation to develop inside an engine when it is warm and the outside temp is dropping. The crankcase has a breather tube that exits at the bottom of the bike. Most likely that puddle was caused by the condensation being drawn off during your morning ride in to work. Perfectly normal.
 

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just had my bike service for the 600 i ask the service about that and also told them about our forum and he said it is normal it comes from the air filter department

i told him just like everyone else said happens only when really hot and sun beating down on bike

so its normal
 

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i bought a used 2017 rebel with only 500 miles on it, rode it around the first day and noticed this happening the first time i parked it out in the sun, IT FREAKED ME OUT SO MUCH!!!! I called a local service department and they said it was a normal thing so i could finally relax hahaha
 
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