RE: MVVS 49
Hi Rajeev,
It is nice to see you here.
I would suggest you restart all over again.
Repeat the break-in on a test stand (can be a makeshift stand - a board with a slot and properly located holes, two full tanks) according to [link=http://www.rcuniverse.com/forum/m_1850473/tm.htm]this RCU thread[/link].
After that, use latex rubber foam around the fuel tank, to fully isolate it from the engine's vibration.
Make sure the pressure nipple of the silencer is open.
Make the adjustments of the needles (high speed first) with the plane in nose-straight-up attitude.
What silencer are you using?