[Voldemort]

try

pawn Код:

if((strcmp("/bikerace", cmdtext, true) == 0)))
{
    SetPlayerInterior(playerid,4);
    SendClientMessage(playerid, 0x00FFFFAA, "You've been teleported to Bike Race.");
    new vehicleid = CreateVehicle(468,-1424.93,-664.58,1059.85, 180.0, -1, -1, -1);
    LinkVehicleToInterior(vehicleid,4);
    PutPlayerInVehicle(playerid,vehicleid, 0);
    return 1;
}

but I dont belive that samp can create car and put you in it so quick, because when you create car its need some 10 ms to spawn car at all