I have not tried this and there might be a hundred reasons that it would never work.

I consider this only for use when you are away from home.
Utilizing a video doorbell and a used or prepaid mobile phone as a security system for a motorcycle.
The phone (not the one you normally carry around) is mounted out of sight and permanently powered (but not kill your startup source). Its only purpose is to make an internet connection.

The video doorbell gets velcro mounted near or on the instrument panel for a strategic view. It can be disguised. Even the inexpensive brands have motion detection and have smartphone software.

The "doorbell" fires off an alert to your main mobile phone so you can see and say hello to a potential trouble maker. Even if it is just some lame-brain plopping onto your bike for a laugh while you are having lunch.
$47 https://www.amazon.com/Wireless-Door...s%2C876&sr=8-3
$40 https://www.amazon.com/Simple-Mobile...xpY2s9dHJ1ZQ==

Just thinking out loud...

You could probably hide the smart phone anywhere on the bike, right? A lot of these phones even have a "track your device" functionality.

That would be great for when you are off the fully loaded bike taking a hike.Great to have two way voice and let them know big hurt is close by. Neat idea.

I’m not sure that would work honestly. I think that the cell phone would go to sleep mode and you would lose your internet connection. Most home cameras and such need WiFi which is sending a continuous internet signal/connection whereas a cellphone would need to be actively being used I believe. There are other options such as some trail cameras for hunting that will send immediate notification to your phone and record video when the motion sensor is triggered.

Overall I'm thinking that a GPS tracker https://www.amazon.com/Vehicles-Trac...gateway&sr=8-9 is a better ideal and specifically made for that purpose.

If you needed more one of these: https://www.amazon.com/Keyless-Bluet...ateway&sr=8-39

Good insurance that covers theft!

Years ago I had a vehicle stolen and got it back. Shame was this was my 1st vehicle and I worked hard for it and really like it. I was glad to get it back until I sat it the drives seat and then it hit me this was no longer my truck.

If a bike or vehicle is stolen I don't want it back.

I fitted a mini GPS tracker to my MT09.

I could not use it like the doorbell idea, EG: if somebody fooled with the bike I would not get notified but if they moved the bike past a set boundary it send me an alert.

It was small and easy to hide I wired it to the bikes battery to ensure it stayed charged.

Here in OZ I used a $15 Aldi 365 day sim card, I could call the bike and it would send me a Google maps link with the bikes location and speed if traveling.

It came in handy when my son dumped the bike on the lead up to the Sydney Harbour Bridge, I was able to find his exact location and plan my place to pull up with the car and trailer to rescue him and the bike.

There was another time it was less helpful, my son was to meet me a Rolex for a boys weekend, it was getting late and dark with a lot of kangaroos about, I called the bike, he was about 25ks away and traveling at about 168kph !, I called again, this time he was doing 178kph, the next few times I rang I could get no service.

I decided it was one of two things, 1; he had crashed & was laying in a ditch, 2; he had stopped at the local pub, it had poor mobile reception, I called the pub on the landline and spoke to my son.

Ripped into him about his dangerous stunt, I asked how come I lost reception after 178kph and his smart ass answer was it must stop working at 200kph dad !!!!!!!!!!!!

Put the cell phone into hot spot mode and it should not use data till the doorbell cam is triggered by the motion sensor.

You could also use a small hot spot box. Smaller than a cell phone. You could point the camera sensor down at the ground to be triggered by feet near the bike. Perhaps that would give few false alarms compared to people walking in front of the bike.