Importing low-to-mid CC motorcycle parts: Does actual weight or volumetric volume usually dominate?

Hey everyone,

I’m setting up a logistics calculator to import mixed batches of spare parts for low and mid CC motorcycles (mostly mechanical, electrical parts, pedals, accessories, etc. NO body plastics, and NO tires).

I'm trying to figure out what usually dominates the Chargeable Weight for these specific types of imports.

For those of you who have experience importing mixed motorcycle spares:

Does the cargo usually trend towards "heavy/dense" (actual weight) or "bulky" (volumetric weight)?

What usually dominates the shipping invoice if you don't optimize the packaging?

Any insights on how these parts usually cube out would be highly appreciated.

Thanks!