Bx2230 New Belt flapping - Is this normal?

[camokubota1]

Hello, I recently had a Kubota dealer install a new belt, since mine was showing wear. I didn't notice if old one flapped and was wondering if this is normal for a Bx2230? (Tractor usage: 943 hours) Thanks
https://www.youtube.com/playlist?list=PLCwVblpF1LKUuagbLiUL59kAHr-GXJNyF

 

[B737]

assuming you're at idle there? mine has similar movement. Once throttled up it smooths out.

 

[SidecarFlip]

Perfectly normal. When belts have a long distance between pulleys, tha appear to be 'flapping', but in reality it's just harmonics. or motion. Forget about it, it's fine. So long as the belt tensioner is tensioning the belt properly, all is good