nahi yar @asjdm aesa hota tu mujhe saray engine ka operation na kerna perta ... maximum for 78cc chonda is 107 after that if you use 109,112,124cc Cylender the Weight is well Big enough in start it was not fitting as it was big then I had to get the center "pally" grinded and tolled by machinist to give spave to Hunge counter Crank weight let me find some picture of that..
Jitni Pistons men Farak tha utna he Counter Wirght me bhi farak tha Look below the Wieght is almost completly filling the crank case .. not a silce room in it...
We found out cranck casde is not assembling as Crank was fatter the total area in crank case...
Sent it to Machnise he grinded and tooled after taking measurement of Crank and Counter weight and we finally got it assembled...
hope it helps.