If you are looking for no nonsense bike rentals try Prento on the beach.He is located next to Coral Seas Garden across from Coconut International's lane.He has scooters ,shadows, and cars for rent;I have been renting from him for many years and never had a problem.If you negotiate a price that you are both happy with he will honour that price so long as you continue to go back to him.You might have to ask to talk to Prento if he has someone else working at the time you inquire.