When your are planning to buy the second hand bike, you must check thw bike conditon first. you should check that their should no noise from engine. very important we should check the documents of the bike, because some peoples doesnt have documents so you will come in problem in future. you should check that their should no oil leakage, you should ask how much milenge its giving. and ask him how many servicing he has done. you should ask whatever questions comes in your mind and then after you should take the bike. best luck guyzss.