I'll second MG's recommendation about Sandeep K Ram. Also why don't you put up this query as a thread on the forum. There are lots of members around who are very well versed with the RX series and their intricacies.
I have very limited knowledge about 2stroke so I don't want to give you any advice. But don't worry I will give you the correct persons email id.
His name is SandeepK ram and he is also from Bangalore, owns a RX125 5speed. His mail id is sandeepkram@gmail.com and has a good knowledge about all 2strokes.