What is this battery thing?

[Mad Mike]

I started my spring maintenance, while checking battery electrolyte on one of my old gals I noticed one of the caps had some type of probe/sensor in the cap. Never noticed it before, never seen anything like this on a bike, it's connected to nothing.

Any ideas?

 

[TwistedKestrel]

Never seen that before, had to look it up. Apparently some older bikes actually had an electrolyte level sensor, e.g. Yamaha Venture Royale, and that may be a multi-fit battery where the sensor was just included with the battery.

 

[J_F]

yeah, I'd say it's a level sensor

dash would have to have a warning light for it to be of any use

 

[GreyGhost]

Never seen that before, had to look it up. Apparently some older bikes actually had an electrolyte level sensor, e.g. Yamaha Venture Royale, and that may be a multi-fit battery where the sensor was just included with the battery.

That seems entirely plausible. I've never seen it either.

 

[Riceburner]

and right you all are....

About Sensors

Many powersports vehicles that use Conventional batteries come equipped from the factory with battery sensors. The sensor indicates battery electrolyte level by flashing a warning light on the vehicle’s instruments panel. This indicates that it’s time to add water to the battery.

Battery sensors are matched to each battery and are not interchangeable.

https://www.batteriesexpert.com/en/...20011-moto-sensor-sonde-pour-batterie-de-moto

 

[Railside Performance]

The above answers are correct and Is it connected to anything on your bike? Cool feature.