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Discussion Starter · #1 ·
Can’t figure out what’s leaking from right under the radiator don’t think it’s coolant because it’s not pink! It seems like it might be brake fluid possibly Someone help
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Looks like coolant. It doesn't seem to have the consistency of oil. There is a lot of info about this.

Loose radiator hose clamp on the left side, was where most of us saw the leak develop. A two minute fix. Just have a screwdriver handy. I will find the correct thread and post a link.
 
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Discussion Starter · #4 ·
Looks like coolant. It doesn't seem to have the consistency of oil. There is a lot of info about this.

Loose radiator hose clamp on the left side, was where most of us saw the leak develop. A two minute fix. Just have a screwdriver handy. I will find the correct thread and post a link.
The only reason I don’t think it’s coolant is isn’t the coolant pink?
 

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2018 KTM 790 Duke, 2008 KTM RC8, 2009 Yamaha MT-01, 2008 Buell XB12Scg, 1993 Yamaha Vmax.
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It might be a leak from the O2 sensor directly above where the pool of liquid is. Check it for tightness.
 

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2018 KTM 790 Duke, 2008 KTM RC8, 2009 Yamaha MT-01, 2008 Buell XB12Scg, 1993 Yamaha Vmax.
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There is oil in the o2 sensor?
No. But I assume it is condensation from the exhaust that leaks around the edge of the sensor. I had it happen after a couple of thousand Kms. Have you checked if it is tight? It looks like there is moisture around one of them in your photo
 

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The only reason I don’t think it’s coolant is isn’t the coolant pink?
No worries. It can be one of four things: oil, fuel, brake fluid or coolant. No other liquids in a bike.

Touch it. It will be very clear what it is not. My bet would be that you will be left with water/coolant. Also the right location for coolant leak.
 
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