Yesterday, I randomly asked my mechanic that why cant one do wheelie easily on GS or Sprinter. I asked him if it is related to bike's weight. He gave me a simple reply first that one of his customer did wheelie on his Honda 175. I got my answer partially right away.
He then told me that there is big difference in engine technology. GS and Sprinter enhance their pick up through bigger weight where as bikes like CD 70, CG 125 use piston to enhance pick up. That is the main reason that we get sudden quick pick on CG 125 and a wheelie can be easily done.
On the other hand GS and Sprinter use bigger weights which result in lesser sudden pick and if you try to do wheelie then it will badly affect the engine.
So the advantage if found,
with pick enhance thru Piston --> you will get a good sudden roaring pick, e.g CG 125.
with pick enhance thru Weight --> Lesser sudden pick. BUT... you will get a better top speed and you can easily go full stretch in a gear. This is one of the reason that we are not getting vibrations in higher rpms in GS as compared to CG (I know there are other reasons like OHV and OHC). Secondly, the rides become economical.
Please dear fellows, I am not very technical and I am not claiming any thing here. This is just a sharing. So please koi mujhe larna mut shru ker dena. Bajaye larnay k ager kisi k pass koi aur is tarah ki sharing ho tou do share it.