You dont need a gear shift indicator if you can count to 5,and as far as the tach goes , just pay attention to the engine and enjoy the ride!,they dont come with a tach!!
I myself know that the bike is simple and was meant to be a simplistic fun riding machine hence the low price tag.that being said you should be able to put whatever you like on your bike.enjoy the ride. That is what it is all about anyway. am I right??