My Ducati Won't turn on after 2 years of no activity

[Juanchojt]

Hello Dicati Forum Members!

I own a 2003 Ducati Monster M750 with approximately 800 miles. It has been sitting for two years, and I'm currently trying to get it back on the road. I installed a new battery and spark plugs, but it struggled to start initially. Eventually, the engine fired up, but I immediately heard a sensation of something "coming loose" internally, and the engine suddenly seized/stuck. It will no longer turn over. I've attached a photo and video for reference—any insight into what might be wrong or how to proceed would be greatly appreciated

Video:
https://youtube.com/shorts/OZR0cOWwetU?feature=share

[ducpainter]

Your image, and sound files are private.

You'll need to provide access.

[Juanchojt]

Hello,

This is the new link. I updated my post with the new link as well

https://youtube.com/shorts/OZR0cOWwetU?feature=share

[Juanchojt]

Update: I have a new development. I removed the spark plugs to investigate, and this is what I found with one of them (keep in mind, this was a brand-new plug).  This suggests something physically struck the plug inside the combustion chamber.

What do you think?

https://youtube.com/shorts/-_nz2HxV2q8?feature=share

I hope it's not that bad! 

[ducpainter]

Your diagnosis of something hitting the plug is spot on. The cylinder head will need to come off.

Before that, pull the belt covers. I think one broke, a valve hit the piston, then broke, stopping any further rotation.

You can do a bunch of messing around, but the basic fact is that head has to come off.