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Old 02-25-2021, 12:50 PM   #1
srcm
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Join Date: Oct 2016
Location: Bay Area
Motorcycles: 2 wheels
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Help needed fixing leaking radiator at the bleed screw

Was changing the porous coolant hoses on a 2019 KTM 790 Duke.

Went to refill the radiator, removed the bleed screw as per the manual, noticed it was very hard to remove, as if it were cross-threaded (not the first bolt/screw I found to be cross-threaded on this bike..must have been assembled by Arnold ).

Yup, you guessed it, the radiator now has a small leak from the bleed screw.

BTW, is it normal for the bleed screw not to have a gasket/washer?

Bike is still in warranty, not sure if this is covered so need help fixing this.

Last edited by srcm; 02-25-2021 at 02:56 PM..
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Old 02-25-2021, 07:02 PM   #2
N4teTheGreat
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Join Date: Dec 2009
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Motorcycles: 2012 DRZ 400s, 2018 Ducati Hypermotard SP
Name: Nathan
If it's under warranty I'd go that route first.
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Old 02-25-2021, 10:01 PM   #3
JMardy
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Join Date: Oct 2006
Location: San Rafael
Motorcycles: KTMs! '13 RC8R, '16 Super Duke SE, 690 Enduro/SMC
Name: Haywood
maybe throw in a copper washer and save a trip to the dealer?
Otherwise, yeah. Warranty fix.
Not sure about the 790 but there's a burping procedure that involves getting the bleed screw to the highest point and getting the motor up to temp.

Last edited by JMardy; 02-25-2021 at 10:02 PM..
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Old 02-26-2021, 09:52 AM   #4
srcm
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Thanks, I'll try the copper washer.
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