Picked it up last week and drove it home after swapping heads at seller's place...TB broke on him after he started it, had sat for a few years. Original D15B2 with pm3-4 head, i swapped in a pm3-3 from the spare motor he had.

Anyway a few hundred kms later i started getting this shrill, metallic sound coming from what i think is the bottom of the motor...its RPM dependent regardless of if im moving or what gear im in. Does not seem to be coming from TB area. I had my head under the hood while revving it today and i cant tell where its coming from...sounds like something is loose?

https://www.veed.io/view/3e784519-57a4-4eb2-834d-2449715dd714?panel=share