^ Yup that body kit is not of GS 150R but from GSX 125 & it is also same as of Ravi Piaggio 125. The reason is Ravi Piaggio is the copy of Suzuki GSX 125 but differs in engine as Suzuki GSX uses OHC engine while the engine used in Ravi Piaggio is OHV identical to CG 125.
SO one thing is clear that mentioned body kit can be easily installed on GS 125/150 chassis with minute modifications but idont agreed at the point that this body kit is light weight & cause the increase in acceleration etc.
The owner of that so called GS 150r shud buy front suspension + Disk barke set up & rear fender from HKS engineering as well to make his bike atleast identical to GSX 125/150.
See below pics of Suzuki GSX 125