I gave up with my silver go 5 port engine. It seems to flame out/bog down at WOT. had try everything in my experience. I purchasing a new orange go 5port to exchange the p/s/c see how it goes. The compression is solid.

I need advise on others factor like:
1. Conrod free play
2. Bearing
3. Shaft
Will this factors resulted to engine flameout or bog down?