I am an owner of the karizma R, it is one of the best bikes.
I nearly have it from the past 3 years but till now I didnt go through any interior defect, best in average, long rides, daily updown and many more.
I had several rides on this bike far places, it didnot affect my physical body nither the bikes engine. Where else now Hero has stopped the production Of the R, I hope so in future it is again launched for the generation, its one of the best ones, a proper investment .* 5/5 ratings for it.