I'm having trouble to run my go 5 port silver head after resting it for 3 weeks, it will die if WOT or run after few minutes. already changed a new OS p3 plug, have been leaning the LSN and not working, riching HSn also not working. Anyway it will run good with igniter on.*Is it good to tune it to factory setting? plz assist. thanks in advance.

I tried richening but no improvement.

i suspect the conrod the engine stil new with a tone of compression, or carburetor? Plz help