ride more, alot more
may sound like its alot, but even 100 miles a week isnt much, bikes move down the road quite easily, and you were jogging more than youve been riding, that's why the weight loss stopped
you need distance and enough intensity to get your HR up and enough time, takes about 10-30 minutes to get warmed up and after that you have to maintain enough pace to keep your HR up and this needs to be held for like 30 minutes or more, so thats an hour minimum~~~ needs to be done frequently, even everyday at that pace wouldnt be too much unless there's something wrong to begin with