[Steven82]

Well get the vehicle model id's and then make the speedometer not show for them. Like OnPlayerStateChange when they get on the bike, just have it not show.

pawn Код:

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    new
        vehicleid = GetPlayerVehicleID(playerid),
        modelid = GetPlayerVehicleModel(vehicleid);
    //
    if(modelid == /* bike id */ || /* another bike id*/ || /* and so fourth */)
        return TextDrawHideForPlayer(playerid, SpeedoTD[playerid]);
    /*
    The rest of your Speedo and OnPlayerStateChange code here. Hopefully you know what i
    mean.
    */
    return 1;
}

I know this isn't your exact coding but i hope it helps.