To install copy "bati.yft", "bati_hi.yft" and "bati.ytd" with openIV into "x64e.rpf/levels/gta5/vehicles.rpf".

or use my tool to setup as Sanchez

AddOnTool here:
https://it.gta5-hub.com/tools/bike-addon-maker-alpha

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Models unlocked feel free to edit