bro dhoom engine is 88cc and cd 70 is 69cc ..
carb cd70 ka lag jaya ga laikin jetting karni paray gi .. and even then it wont be ideal situation ..
i also faced this issue with my dhoom 2009 model .. and i replaced jets and problem solved .. but i got a dozen or so jets of same number because even number was same they were not precise in the specs ..
first u should try a 100ml method to verify ur bike economy .. search on of my thread on this method .. only if u are getting poor economy then u should change jets ..
buy 35 pilot .. but match both jets .. they should be ditto same on outside ..
and 78 main jet ..