Help... sensor fell out.

[race24x]

Ok changing my top gear out put the chaincase back in and I found this sensor laying in the bottom of the belly pan under the oil tank. What did I unplug/break and where does it go?

 

[thor452]

I had the same thing happen to mine. there is a dimple in the side of the chain case that it sits in looked to me that it was silicone in so that is how I reattached it. I have not got it back together yet so I hope it works. seems like it might be a speed sensor reading the magnets on the side of the drive shaft.

 

[race24x]

I found where it goes but what is it and can I just glue epoxy right stuff it back on the chaincase? What is this thing...

 

[Hammer70]

I found where it goes but what is it and can I just glue epoxy right stuff it back on the chaincase? What is this thing...

right stuff it back on chain case make sure it’s cleaned very well with no oil on anything use brake cleaner and clean cloth. It happened in our group 2 season ago and never had issue since. Vehicle speed sensor for speedo

thanks Pan

 

[cannondale27]

Pretty common. Thats your speed sensor.

 

[race24x]

Thank you everyone

 

[Hammer70]

 

[stohlem]

I found where it goes but what is it and can I just glue epoxy right stuff it back on the chaincase? What is this thing...

Yes it is a speed sensor. Mine fell off also and speedo showed 200 mph plus constantly. Would not let reverse work. Clean and use good RTU silicone to reattach. If you rode it for awhile detached, you may gain up to 500 mi. on odometer that you didn't have before.

 

[race24x]

Didnt ride it yet, just putting the chaincase back on from replacing upper sprocket