[Lucases]

I guess you are showing the speedometer to passengers too.
Check if players are passengers before showing the speedometer

pawn Код:

public OnPlayerStateChange(playerid, newstate, oldstate) 
{ 
    if(newstate == PLAYER_STATE_DRIVER && !IsBicycle(GetPlayerVehicleID(playerid))) 
    { 
        TextDrawShowForPlayer(playerid, SpeedoText[playerid]); 
    } 
    else 
    { 
        TextDrawHideForPlayer(playerid, SpeedoText[playerid]); 
    }