[MafiaOink]

Don't try this, I've tried this aswell. I have used Onplayerupdate and set velocity under it, it became laggy and very dependent on player's ping. It will work fine only if you are having like 1-10~ ping.
If you want to change the maximum speed then use the plugin by .silent which allows you to change handling using a better method.

Here's a link: https://sampforum.blast.hk/showthread.php?tid=663066