c1 toward solving this problem, the first version c1 was quite hit because of novelty value though second version of it wasn't able to impress the consumer.
one of major issue involves with enclosed two wheeler is safety and usability. Making safe design accounting mishap is a huge task.
Rain protection in possible only if it is fully enclosed but you have to keep provision for leg support on both side also this protection has to be fully dynamically stable at least till 35 kmph to be acceptable.
some of tried version of enclosed two wheeler has side support wheel to provide stability while slow speed.
but these are extremely expensive arrangement ,lets see how much indian consumer can shell out for similar solution.
cost of indian two wheeler- 35000 to 120000 INR
four wheeler price- 150000 to ...above
second hand four wheeler 80000 to above
by seeing above data i can easily say one can not be able to shell out more than 20000 INR.
solving this one need to look whole spectrum of problem , legality, safety ,usability then only it is possible to satisfy consumer