170i valve adjustment - O2 sensor.

DeeDee · Post by **DeeDee** » Thu Feb 12, 2015 9:39 pm

Hello Modern Buddy. I'm doing the 500 mile service on my 170i. Can an experienced owner tell me if that is the O2 sensor I see coming out of the valve cover?
I assume I leave that attached to the valve cover, is that correct? My 125 doesn't have one of these. Thank you!

GregsBuddy · Post by **GregsBuddy** » Fri Feb 13, 2015 7:06 pm

O2 sensors are used in exhaust gasses only.
PCV?

Syd · Post by **Syd** » Fri Feb 13, 2015 8:33 pm

I agree with Greg, that's probably the PCV valve coming out of the valve cover. And if my mechanical memory is correct, the little ball in the PCV valve should move around freely.

KrispyKreme · Post by **KrispyKreme** » Fri Feb 13, 2015 9:47 pm

Syd wrote:I agree with Greg, that's probably the PCV valve coming out of the valve cover. And if my mechanical memory is correct, the little ball in the PCV valve should move around freely.

Go through the pet carrier and disconnect, then take off the cap. Perform valve adjustment. Reverse. Saved $100.

DeeDee · Post by **DeeDee** » Fri Feb 20, 2015 5:26 pm

I did my 500 mile service including valve adjustment. That extra contraption plugged into the valve cover is some type of an electrical sensor. It is connected to the wiring harness. No problem, there was enough length to leave it plugged in. It was long enough to set the valve cover on the floorboard while I checked the valves. Since I had to remove the CVT cover to rotate the crank, I figured I would like to know the stock roller weight. I removed the variator. Stock rollers weigh 13 grams. I just happened to have a new set of 12 gram Dr. Pulley sliders. In they went. Now all we need is warm weather with no snow.

skully93 · Post by **skully93** » Fri Feb 20, 2015 11:23 pm

DeeDee wrote: Now all we need is warm weather with no snow.

hopefully by our 28th Misfit ride?

dedcat · Post by **dedcat** » Sat Feb 21, 2015 1:32 am

DeeDee wrote:Hello Modern Buddy. I'm doing the 500 mile service on my 170i. Can an experienced owner tell me if that is the O2 sensor I see coming out of the valve cover?
I assume I leave that attached to the valve cover, is that correct? My 125 doesn't have one of these. Thank you!

That's the engine temperature sensor for the EFI. It's fairly easy to disconnect-you do have to press a little release tab near the wire end of the plastic connector before it will pull off. I prefer to disconnect it rather than let the cam cover hang by that thin wire as I tend to get klutzy.

viney266 · Post by **viney266** » Sat Feb 21, 2015 8:08 pm

dedcat wrote:
That's the engine temperature sensor for the EFI. It's fairly easy to disconnect-you do have to press a little release tab near the wire end of the plastic connector before it will pull off. I prefer to disconnect it rather than let the cam cover hang by that thin wire as I tend to get klutzy.

^^^ What he said, its a temp sensor.

New2Scoots · Post by **New2Scoots** » Thu Apr 09, 2015 12:57 pm

DeeDee, how did the 12 gram Dr. Pulley sliders work out?

DeeDee · Post by **DeeDee** » Thu Apr 09, 2015 7:59 pm

I installed them about 250 miles ago. My scooter only has 750 on the odometer, so it is still pretty stiff. I have had outstanding experience with sliders in my 50cc Yamaha C3. I don't know if they make a difference or not at this point. Start from a dead stop is smooth, acceleration is good. My 170i wasn't broken in, so i don't have anything to really compare it to. I do believe the Genuine Buddy stock variator and rollers are really high quality. (not much of an answer, is it?)

New2Scoots · Post by **New2Scoots** » Fri Apr 10, 2015 2:34 am

Thanks DeeDee. Thinking about getting those too but I may wait until I need new sliders.

Modern Buddy

170i valve adjustment - O2 sensor.

170i valve adjustment - O2 sensor.

Re: 170i valve adjustment - O2 sensor.

Re: 170i valve adjustment - O2 sensor.