Actually it was my fault that I did not tun in it properly. It its a brand new machine. The side of the poison was scratched due to the un aware dropped plug wire, the underhead got messed up a bit. So I may look for a brand new set of poison and sleeve.
Thanks for you guys help.

I recall when this engine was out in the market many years ago, there were issues that people easily got the poison scratched even run in by very experienced racers. Some people complained and sent back. I am not looking for any claim. But I might be one of them ending up. Have any of you heard that quality issue before.