You have some paperwork issues on that plan: carnets and visas.
You should have a look around the site on the question of carnets for Indian registered bikes.
If you are a UK national then visas for Iran present some problems. Again, have a look around the site for discussions.
The borders on the route you suggest are all open and often frequented by overlanders. It is a fine route and a plan well worth pursuing, but the vehicle you are looking at will give you quite a few challenges, bureaucratic and mechanical.
Keep your options open I would, but yes, the route is a good one.
Around the world 2000-2004, on a 1993 Honda Transalp