I bought a two wheeler in Bangalore & now got transfered to mumbai.I have paid 4.5% octroi & also applied for NOC at Bangalore RTO.What else should I do to get my vehicle registered in Mumbai?

You should appear before RTO of your area in Mumbai & show your registration book, taxation book, insurance policy, PUC certificate and the NOC from RTO Banglore & Octroi receipt.If the vehicle is older than 30 months it will be transfered immedietly.If it is less than 30 months old you have to pay life time tax & entry tax in maharashtra.