O2 sensor replacement

Woe unto you that bought the first model year of a major remake, perhaps this section can help address any 2014 and later model Ural "imperfections". Here's a special section for folks with the latest rigs to discuss 2014 and later model-related topics such fuel injection, 3-wheel disc brakes, hydraulic steering dampers, spin-on oil filters and other anomalies that don't belong on true Russsian motorcycle ;-P We've gone from using big hammers and greasy wrenches to needing computers and Ouija boards in order to fix our rigs.
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Please keep this section specific to issues pertaining to 2014 and later models such as fuel injection, sidecar and rear disc brakes and so forth. Ask general or non-2014 and later specific questions in the main Hammerin' & Wrenchin' section.
eastbloc
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O2 sensor replacement

Post by eastbloc » Sun Feb 03, 2019 5:10 pm

My rig threw MIL code 243 and sure enough it looks like the O2 sensor wire is boned, the rubber gasket that sits down in the sensor body and holds the wires apart and the water out came out of it.

I was gonna pull it off and see if I can put humpty dumpty back togeher, but it doesn't want to come out of the header, either, with penetrant or heat (I haven't tried a torch yet because I'm out of gas).

As per Ural NE, these are $60 new each? WTF.

Anyone find a cheaper alternative?
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Re: O2 sensor replacement

Post by windmill » Sun Feb 03, 2019 5:22 pm

Haven't done it on a Ural, but get it nice and hot riding it, and use a deep well impact socket with breaker bar, obviously you need to cut the wires off.

$60 for an 02 sensor doesn't seem out of line?
Barry

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eastbloc
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Re: O2 sensor replacement

Post by eastbloc » Sun Feb 03, 2019 5:24 pm

I’m not sure why they would cost $60. Do they use precious metals or something? A set of four costs that much for a car.

I plan on reinstalling the Raceway headers so I don’t need to get them out except I don’t want to have to spend $120 on a pair.
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Re: O2 sensor replacement

Post by windmill » Sun Feb 03, 2019 5:56 pm

eastbloc wrote:
Sun Feb 03, 2019 5:24 pm
I’m not sure why they would cost $60. Do they use precious metals or something? A set of four costs that much for a car.

I plan on reinstalling the Raceway headers so I don’t need to get them out except I don’t want to have to spend $120 on a pair.
Naturally, being for a motorcycle makes them more expensive...........

When I replaced one on my wifes car it was around $45.
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Re: O2 sensor replacement

Post by Burt1713 » Sun Feb 03, 2019 6:04 pm

A line or fitting wrench can be used to lessen the chance of rounding and you don’t have to cut the wires. I also believe there is a socket made specifically for O2 sensor removal.
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Re: O2 sensor replacement

Post by hotflash44 » Sun Feb 03, 2019 6:36 pm

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Re: O2 sensor replacement

Post by rivers » Sun Feb 03, 2019 6:51 pm

Remove the wires, feed on a real box end wrench and reef on it(not the Yak cheese Ural open end wrench). Yeah a hot header pipe will take less of a grunt factor.
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Re: O2 sensor replacement

Post by Mr Wazzock » Mon Feb 04, 2019 3:37 pm

eastbloc wrote:
Sun Feb 03, 2019 5:24 pm
I’m not sure why they would cost $60. Do they use precious metals or something? A set of four costs that much for a car.
They are specially designed miniature ones, if memory serves... car ones are bigger... made by Delphi I think, saw it on their web site.
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Re: O2 sensor replacement

Post by eastbloc » Tue Feb 05, 2019 12:53 pm

Oh well, I bought new ones from UralNE and scored a used front fender for $80 while I was at it to anticipate mine rusting off.
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Re: O2 sensor replacement

Post by eastbloc » Sat Feb 09, 2019 10:52 am

I disconnected my remaining sensor while waiting for the replacements. My bike loves not having sensors, it's ready to run pretty much as soon as I start it and other than a little extra backfiring (presumably from an over-rich mixture) runs much better off idle through 2500RPM where it's normally a bit sputtery.

I won't bother connecting the sensors back until I'm ready to assemble my newly coated Raceway 2-into-1 setup.

The new sensor looks a little different from the old ones. Hope springs eternal that this will manifest as some sort of improvement, but who knows.
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Re: O2 sensor replacement

Post by windmill » Sat Feb 09, 2019 11:19 am

eastbloc wrote:
Sat Feb 09, 2019 10:52 am
I disconnected my remaining sensor while waiting for the replacements. My bike loves not having sensors, it's ready to run pretty much as soon as I start it and other than a little extra backfiring (presumably from an over-rich mixture) runs much better off idle through 2500RPM where it's normally a bit sputtery.
I've seen that mentioned about other bikes too. I've also seen where folks add resistors to change what they're telling the ECU.
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Re: O2 sensor replacement

Post by Albuquralque » Sat Feb 09, 2019 12:55 pm

"Put a little gravel in your travel"

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Re: O2 sensor replacement

Post by Subsnowden » Sat Feb 09, 2019 1:18 pm

I noticed the newer Urals have the O2 sensors much closer to the engine. Did they find that location to be better somehow?
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Re: O2 sensor replacement

Post by Mr Wazzock » Sat Feb 09, 2019 3:14 pm

windmill wrote:
Sat Feb 09, 2019 11:19 am
eastbloc wrote:
Sat Feb 09, 2019 10:52 am
I disconnected my remaining sensor while waiting for the replacements. My bike loves not having sensors, it's ready to run pretty much as soon as I start it and other than a little extra backfiring (presumably from an over-rich mixture) runs much better off idle through 2500RPM where it's normally a bit sputtery.
I've seen that mentioned about other bikes too. I've also seen where folks add resistors to change what they're telling the ECU.
Yes this is often the case. It forces open-loop fueling which naturally can't be too lean for safety reasons (safety of the engine that is); in closed-loop the ECU uses the O2 sensor to see how lean it can get the mixture with a view to using up all the fuel injected in. Too lean then more oxygen starts appearing in the exhaust gas, then it knows to put more gas in.

I'm also on a couple of Moto Guzi forums and there again it's often come up that disconnecting the O2 sensors is a fix for spluttering and lurching behavior especially at small throttle openings. So not just Ural's suffer you see. :D

The downside, especially for latter models, is a permanent MIL light. :(
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Re: O2 sensor replacement

Post by eastbloc » Sat Feb 09, 2019 3:21 pm

I can live with the MIL light. I reckon increase in fuel consumption would be another downside. But I can’t think of any other.
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