September 13th, 2020, 04:50 PM | #1 |
ninjette.org newbie
Name: Duc
Location: Iowa
Join Date: Sep 2020 Motorcycle(s): 2019 ninja 400 ABS Posts: 3
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Smoking O2 sensor
So white smoke comes out of O2 sensor after 2 minutes of idling. Bike is 2019 and has about 760 miles. What could be the issue here, team ninjette?
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September 13th, 2020, 06:54 PM | #2 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Hi Duc & welcome to Ninjette!
White smoke is usually coolant. Typically from cracked head or blown headgasket. Does it come out of body of O2-sensor? Or the threads? Or out end where wires are? Any white smoke out tailpipe? Does white smoke come out anywhere after bike’s fully warmed up (about 10-15 min)? Last futzed with by DannoXYZ; September 13th, 2020 at 10:24 PM. |
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September 13th, 2020, 07:49 PM | #3 |
ninjette.org newbie
Name: Duc
Location: Iowa
Join Date: Sep 2020 Motorcycle(s): 2019 ninja 400 ABS Posts: 3
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Hello,
The smoke comes out where the crush washer meets the header. So I think it’s the thread. It will come out normally 1-2 minutes after starting up. The washer looks a little rusted. I’ll check the tail pipe tomorrow. |
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September 18th, 2020, 07:47 AM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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@Azn400
Any more news on this smoking? Forgot to mention to check if O2-sensor is fully tightened. Might want to remove, replace crush-washer and re-install. |
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September 18th, 2020, 12:44 PM | #5 |
ninjette.org newbie
Name: Duc
Location: Iowa
Join Date: Sep 2020 Motorcycle(s): 2019 ninja 400 ABS Posts: 3
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No white smokes from tail pipe. It could be sitting for a while and burned off the old gas. After refueling with no-ethanol gas, it runs fine. I still smell some smoke but not like before. You might be right about replacing the crush-washer. Thank you.
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September 18th, 2020, 03:08 PM | #6 |
EX500 full of EX250 parts
Name: Bill
Location: Grand Rapids-ish, MI
Join Date: Jul 2012 Motorcycle(s): '18 Ninja 400 • '09 Ninja 500R (selling) • '98 VFR800 (project) • '85 Vulcan VN700 (sold) Posts: A lot.
Blog Entries: 1
MOTM - Aug '15
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I don't see any traces of coolant from above in your pic, but check out Cylinder coolant seal issues to make sure you don't have a leak there.
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