There is no inbuilt html helpers for Image Hyperlinks.we have to create custom html helper inorder to get this requirement.So refer the below links you will get an idea.
Based upon your comment.i give the solution like this:
@if (Convert.ToString( bike.Name) == null || Convert.ToString(bike.Name) == "")
{
bike.Name = "Empty";
}
@Html.ActionLink(Convert.ToString(bike.Name), "Categories", new { @id =bike.Id, @name = bike.Name },new{ @class = "image" })
Here i gave "Empty" if bike.Name is Null or Empty.