IPC 279/338 - two wheeler accident

I sold my bike approx 9 years back through a mechanic(random local) to a person who he brought with him. I unfortunately lost his contact details and name, spoke to the mechanic but he is also not able to remember his details. At the time of deal the buyer got the forms signed by me to get the RC transferred on his name, so I did not go for sale deed. Now I got to know through police summon that a FIR has been filled against me as the vehicle was never transferred from my name under IPC 279/338. The bike rider hit a lady and ran away. She sustained leg fracture, head injury which has caused problems in recognising ppl but she is better now. In fir no eyewitness is mentioned who was there. I tried offering him some money but he seems to be interested in more money , asking for compensation in lakhs. As I am not able to locate the bike and rider so can some one suggest what trouble I am in and what could be the possible way outs as the matter is already submitted in mact court. Also, how to safeguard myself for future?