Hi and welcome to the forum
Coming from a 600cc inline 4 which has easily over 100bhp to a 660cc big single which has 47bhp under half the power and probably weights in and around the same is why you probably feel as though the bike automatically feels under powered.
However change the way you ride and the roads you use and you will soon find that the big single engine although down on top end power actually has more then enough torque on the lower end of the revs and can create a few
moments.
The tenere is a good 20kg heavier than the R/X however it does has a bit more power/torque due to a redesigned/worked airbox.
Best way to get power as Kev says is to let more air into the air box, best way is either a Stg2 or Stg3 (stg3 quiet expensive)