I own an '08 Wee from North America. I want to add an O2 sensor. How difficult would this be?

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As I've told you many times before, the journey is the destination. So to answer your question: Yes, we are there.

It would require a Euro ECU and wiring harness. Are you aware it's only an emissions control device and will do nothing for performance?

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Pat- The wolf with an E in grey.
2007 DL650 w/ABS AMA Life Member #755148

I was hoping it would be as simple as buying a $20. sensor and plugging it into the existing harness. Anyone with a euro bike that needs a North American wiring harness?

It's the OCD in me. Also call me a hippie, but I like clean air. It's one of the reasons I started riding in the first place. It also annoys me when I get knocking on low octane fuel at high altitude. I believe that an engine run at stoichiometric will last longer than one run anywhere else.

I thought it had one when I bought it!

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As I've told you many times before, the journey is the destination. So to answer your question: Yes, we are there.

High altitude means a lower octane requirement. My 650 runs fine on 85 octane over 5000ft. Good on ya for your concern about the environment. Most questions about emissions here are about taking the emissions gear off.

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Pat- The wolf with an E in grey.
2007 DL650 w/ABS AMA Life Member #755148

I thought it was the other way around. Not trying to argue; a quick internet search shows I got it wrong. Now that I think about it the high octane didn't help as much as I assumed; I remember knocking around 9000ft on 91 octane.

Just chalk up another reason for the O2 sensor. I thought I left these altitude problems behind with my carburated bike.

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As I've told you many times before, the journey is the destination. So to answer your question: Yes, we are there.

An O2 sensor will not help with an off kilter mixture. Try using 85 octane if it is available locally or 87 at lower altitudes. If it pings, something is wrong. It may need a throttle body synch or it may have a loose boot on the throttle body allowing an air leak. A properly set up 650 should not ping, especially at higher altitudes. The dual plug heads are very good at mixture firing control. Make sure all four plugs are okay too.

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Pat- The wolf with an E in grey.
2007 DL650 w/ABS AMA Life Member #755148