<div id="map"></div>
<script>
$("#map").kendoMap({
    layers: [{
        type: "bing",
        key: "AqaPuZWytKRUA8Nm5nqvXHWGL8BDCXvK8onCl2PkC581Zp3T_fYAQBiwIphJbRAK"
    }]
});

var layer = $("#map").data("kendoMap").layers[0];
layer.hide();

setTimeout(function() {
    layer.show();
    console.log("Bing layer is now visible");
}, 2000);
</script>