Someone borrowed my credit card loans to buy a motorcycle, if he is not timely repayment, how should I do?

Question 1: a friend of mine bought a motorcycle with my ID card and credit card loans, repayment. Monthly pay my card. But I am afraid of what. For example, no time to play. It will affect my personal reputation. So I want to write a protocol. Do not know how to write. I look forward to your guidance

2 A: first of all, you want to write protocol is "the repayment agreement" or "loan contract". The agreement or contract must be clear each other's monthly repayment amount, date and not repaid in full and on time of the liability for breach of contract. Calculation of the liability for breach of contract should be clearly agreed liquidated damages or to pay interest, purpose is to supervise each other to comply with the repayment agreement.
Secondly, if the other party fails to repay on time, you should be paid in advance, so as not to affect your personal bank credit, you can be on the basis of the above "the repayment agreement" or "contract" for each other liability for breach of contract after the repayment.