​​Royal Enfield will most likely carry over the engine to the Shotgun 650 without many changes to it. It will, however, offer USD instead of the conventional ones of the existing 650 twins. The new bike has been spotted during testing a number of times already and being seen with accessories could point to it heading towards its final production version.

from Times of India https://timesofindia.indiatimes.com/auto/bikes/royal-enfield-shotgun-650-india-launch-november-eicma-specs-expected-price-tripper/articleshow/94396140.cms