I have biked from Manali to Leh twice. It is quite simple. No hassles no paperwork, nothing just bought an enfield for cash & headed North. On the second trip I went Leh to Kargil and from Kargil to Padum in Zanskar, incredible. The I went down to srinighar and on to Jammu then over to Dharahmsala. No hassles at all. Kashmir is now very safe, at least along the roads. You have to go south to cross into Pakistan & then head up to Islamabad then Gilgit.
India Himal, 3mo,2x; Kazak/Krygyz/Tajik, 3 mo; Kashi-Lhasa, China 219! 6 wk; Nepal, 4 days/trekked 55; Santiago-Ushuia-Cusco, 7 mo; Peru, 3 mo; Chile-Medellin 3 mo; Medillin-Arica, 3 mo