To buy the Royal Enfield Classic 350 on EMI, you will need several documents, including proof of identity such as an Aadhar Card, PAN Card, or Voter ID. Additionally, you will need proof of address, which can be a driving license, electricity bill, or other valid address proofs. Other required documents include a selfie in good lighting, salary slips for the last three months or bank statements for the last six months to demonstrate financial stability. You must also be an Indian resident, with a minimum age of 21 years and a maximum age of 60 years at loan maturity[5).