I have Honda Dio 2015 Model. Yesterday, I kept the Choke ON while riding. I wanted to know what are the damages it probably causes to the engine? Does it have any after effects on the engine?
If it is a mixture richening device (rather than just a fast idle circuit used on most modern fuel injected vehicles), then fouled plugs, carbon build up (including on the lambda probe and cat), etc, would follow.
But a possibly bigger problem is washing the oil from the bores, greatly increasing engine cylinder wear, and some fuel getting past the rings to dilute the oil.
Of these the only one I would really worry about from a short 1 off ride would be the spark plugs and a quick thrash ("Italian Tune Up") will probably clean those out.