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Old June 29th, 2018, 07:04 PM   #1
1994Ninja250F
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Something Melting / Dripping onto Exhaust

Hey guys,

I've owned my Ninja for 8 years now and been around these forums for about that long as well, and have never heard of this one. So I took a 20 mile "spirited" ride around the lake, and when I parked I noticed smoke coming up from my exhaust in the area of the gear selector. Sure enough, something was dripping onto it.

It's definitely not coolant (been there done that), and does not look nor smell like oil. It almost looks like a ton of melted road tar, it's a goopy consistency. The only other thing I can think of is maybe it's an overflow hose melting, or even the sheath to a wiring harness melting? I really have no clue. I find it odd that this has never happened before though.

It was getting dark when I got back from the ride, so I figured I'd throw this out there to see if anyone has had/heard of anything similar to this. Either tomorrow or the next day, I'll put it on the center-stand in daylight and look into it further. I attached some pictures of what I'm dealing with.
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Old June 29th, 2018, 08:54 PM   #2
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Old June 29th, 2018, 09:15 PM   #3
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Quote:
Originally Posted by 1994Ninja250F View Post
Hey guys,

I've owned my Ninja for 8 years now and been around these forums for about that long as well, and have never heard of this one. So I took a 20 mile "spirited" ride around the lake, and when I parked I noticed smoke coming up from my exhaust in the area of the gear selector. Sure enough, something was dripping onto it.

It's definitely not coolant (been there done that), and does not look nor smell like oil. It almost looks like a ton of melted road tar, it's a goopy consistency. The only other thing I can think of is maybe it's an overflow hose melting, or even the sheath to a wiring harness melting? I really have no clue. I find it odd that this has never happened before though.

It was getting dark when I got back from the ride, so I figured I'd throw this out there to see if anyone has had/heard of anything similar to this. Either tomorrow or the next day, I'll put it on the center-stand in daylight and look into it further. I attached some pictures of what I'm dealing with.
Eight year build-up of chain lube?

Bill
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Old June 30th, 2018, 07:39 AM   #4
1994Ninja250F
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Quote:
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Eight year build-up of chain lube?

Bill
Was thinking that, since it does have kind of a grease smell to it. And the underside of my bike could use a good degreasing. Do you usually get a buildup of lube there? I thought the front sprocket was fully contained and shielded within that front sprocket cover and thus, shielded from this kind of situation. Apologies if I’m wrong on that, drove my car to work today/don’t have bike in front of me to look at right now.
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Old June 30th, 2018, 08:44 AM   #5
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Originally Posted by 1994Ninja250F View Post
Was thinking that, since it does have kind of a grease smell to it. And the underside of my bike could use a good degreasing. Do you usually get a buildup of lube there? I thought the front sprocket was fully contained and shielded within that front sprocket cover and thus, shielded from this kind of situation. Apologies if I’m wrong on that, drove my car to work today/don’t have bike in front of me to look at right now.
There can, and probably is, a grrrrrrate deal of crud under the sprocket cover. Open er' up and see what I mean. Especially if you have been diligent in lubricating your chain. The counter shaft (small) sprocket is exposed just like the rear sprocket.

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Old June 30th, 2018, 10:05 AM   #6
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Quote:
Originally Posted by 1994Ninja250F View Post
Was thinking that, since it does have kind of a grease smell to it. And the underside of my bike could use a good degreasing. Do you usually get a buildup of lube there? I thought the front sprocket was fully contained and shielded within that front sprocket cover and thus, shielded from this kind of situation. Apologies if I’m wrong on that, drove my car to work today/don’t have bike in front of me to look at right now.
It's shielded in sense that oil can't get flung outwards to coat your calf and engine. But it's still being flung away from chain and gets caught on inside of sprocket guard. Over time it builds up to many, many gallons stuck to inside surface. Eventually it builds up enough to actually touch chain and gets scraped down and out by moving chain.

Remove sprocket guard and clean out insides.
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Old June 30th, 2018, 10:52 AM   #7
1994Ninja250F
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I opened it up and that looks to be the exact issue, and yes I lube the chain every 2 tanks of fuel so about every ~500 Miles. Thanks to all for the help!
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Old June 30th, 2018, 01:23 PM   #8
Ram Jet
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Originally Posted by 1994Ninja250F View Post
I opened it up and that looks to be the exact issue, and yes I lube the chain every 2 tanks of fuel so about every ~500 Miles. Thanks to all for the help!
See, that's what you get for proper maintenance! Good for you Sir!

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Old June 30th, 2018, 02:30 PM   #9
1994Ninja250F
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Originally Posted by Ram Jet View Post
See, that's what you get for proper maintenance! Good for you Sir!

Bill
Haha right? Now it gives me an excuse to strip the bike down and get all the gunk and goo out of all the nooks and crannies. I’m honestly surprised it took 8 years for this to happen, that’s a lot of chain lube!
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Old June 30th, 2018, 02:44 PM   #10
Ram Jet
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Haha right? Now it gives me an excuse to strip the bike down and get all the gunk and goo out of all the nooks and crannies. I’m honestly surprised it took 8 years for this to happen, that’s a lot of chain lube!
Your OK! You'll be riding that little baby till 2030! I'm riding my 07' to the Keuka Park Cemetery. Unless I find a 1971 Ducati 750 Super Sport in the interm.

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