No
You do not have to have blinkers on a motorcycle in Texas. If you do have blinkers they have to work properly. But if you DO NOT have blinkers you can still get the bike inspected and you will have to use hand signals or risk getting pulled over for not using hand signals.
Yes, it is legal to use hand signals when driving. In fact if your turn signal goes out you should use hand signals.
No, turn signals are required on the vehicle.
yes
If you don't have turn signal lights then you must use hand signals.
Hand signals are to this day a legal form of traffic control devices.
Make sure the wires to the blinkers are not loose and that the bulbs work (turn on the hazard lights to see). It is best to call a mechanic to look at your vehicle. While some places do allow you to drive using hand signals, some countries do not allow it. Since you didn't mention a country, we cannot advise you legal-wise.
technical foul,e legal dribbling
Yes
Yes, but you also must have operating turn signal lights.
Yes, it is legal. Watch out though. Anything other then open hand on the buttucks that leaves no marks can get you in trouble.
Flashing indicators, also known as turn signals or blinkers, were introduced in the UK in 196 signals were made mandatory for new vehicles in 1965. Prior to this, hand signals were commonly used by drivers to indicate turning intentions. The introduction of flashing indicators improved road safety by providing a clearer and more visible means of signaling intentions to other road users.