Yes, you can purchase the TVS Jupiter 125 through the CSD portal. The TVS Jupiter 125 BSVI-Disc variant is available for purchase through CSD, and you will need to meet the eligibility criteria, which includes having a CSD Smart Card, PAN Card, Aadhaar Card, and other relevant documents such as a PPO or Discharge Book for ex-servicemen. You can follow the detailed instructions on the CSD online portal to complete the purchase, including selecting the model, adding it to your cart, and making the necessary payments for additional charges like insurance and registration.