I believe that is a TPS sensor, I had one malfunction on my 04 Cr125 and it caused the throttle to stick wide open one day when I started it up at the track.
@@NickW90 mooses top of the line chain. Thought id try it and see how it does cause i get it real cheap. So far i have 2.2 hours and it seems to be holding up. Normally I run the DID ERT3.