Samir, you NEED to find someone at the tracks where you’re running to help you out. There must be folks there who are familiar with Leopards that can look over your equipment and figure out your issues very quickly. Helping you over a forum is really tough! Better yet, at some point you’re going to need an engine builder to rebuild your engine. Find one now, and ask for his help. We would all like to help here on ekarting, but another competitor or engine guy can fix all your problems in minutes and head you in the right direction.
I know that didn’t help, but I suspect others will agree.