Try this one.
Back up your gameconfig before you replace it.

https://nl.gta5-mods.com/misc/gta-5-gameconfig-300-cars

It works for me.

I have replaced the files below for the original files but it has had no effect.

1. Vehicles.meta go to:
   Grand Theft Auto V \ update \ update.rpf \ common \ data \ levels \ gta5

2. carvariation.meta go in:
   Grand Theft Auto V \ update \ x64 \ dlcpacks \ mpchristmas2 \ dlc.rpf \ common \ data

When I have the original policebike, there is no driver on the Policebike.
when I successfully install an Police bike mod, I keep the same problem.

I replace the orgineel policebike uniform but i keep the same problem.
In the game comes the police motor drive and falls as soon as I see him well.

Who can help me please?