Hi I have a default ebay 2 stroke 80cc kit with the stock NT carb. Currently I have the pin in the carb set to the leanest setting (towards the top) as all the other settings seem to give some form of 4 stroking. When I start the bike I choke it for around 5 seconds then immediately switch to completely open. The bike idles perfectly fine when cold or when warm so I don't suspect any air leaks. However I have noticed something peculiar: If I have the choke ever so slightly closed, I have a significant power boost both in acceleration and in climbing hills. It doesn't seem to 4 stroke and idles perfectly fine. So my two questions are as follows: Is it okay to run the bike at this choke setting like this? Is there any adjustments to the carb that I am missing out on?