where to weld bung in the pipe for air fuel sensor

backcountrysnowbikes · Nov 28, 2016

it probably has been covered but I'm wondering where is the best to weld a bung in the pipe for air fuel sensor.

mid pipe by the other sensor
or out where the can meets the pipe

thanks in advance

Reg2view · Nov 28, 2016

I was told fatest art of the pipe at 2 or 10 o'clock by the sensor OEM. That was 8 years ago. Do a search, this has been discussed before. Use google, it will likely be better that the search crawl here.

backcountrysnowbikes · Nov 28, 2016

That's what I thought just needed seconded opinion

The Bob · Nov 29, 2016

I second the fattest part of the pipe and 10 or 2 o'clock position (2-strokes so oil doesn't build up) and not inline with other sensors. 800 CFI's I am usually right above and behind the stock EGT. I have a Aaen pipe that I put in front of the EGT because it runs such a long internal stinger

Reg2view · Nov 29, 2016

backcountrysnowbikes said:
That's what I thought just needed seconded opinion

FWIW, for an 02 sensor (not a exhaust temp probe, but you said this is for A/F), consider using a heat sink for the sensor - you'll get much longer life out of it, and more accuracy - been there, done that. Same bung, just need more clearance. They are not that expensive, considering the cost of a sensor.

flying frenchman · Jan 2, 2017

I put one on my pro years ago. Stock pipe, kept cracking the weld.
Worst of place to break off was deep in the mountains. Not fun.

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where to weld bung in the pipe for air fuel sensor

backcountrysnowbikes

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Reg2view

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backcountrysnowbikes

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The Bob

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Reg2view

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flying frenchman

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