bro thanks for the reply. Initially there was a little leakage from the seal. The advice of tightening the bolts is not valid as the bolts are alredy very tight and if further force is applied on the spanner it slips and the bolt heads also seem soft (according to my view).
Now the oil is leaking from the RPM cable and a little from the seal.
Please post here the solution after visiting HKF.
Also verify the exact oil capacity of its engine as over filling the oil can also make such problems. I use only 850ml of oil on each oil change (I know some old oil is left in the engine after drainage) but still I have doubt of its engine oil capacity.
One thing more. Whether Storm 150cc engines are sold separetly or not, its price and can we install it in our bikes frame.