Hello I have a question I have a Bashan 200cc and when I put it in first gear and I push the trottle up high and release the clutch it sounds like its going to stall and has to catch up to itself it only does this in 1st gear when I am in 2nd , 3rd and 4th it works fine when the trottle is pushed up high. Is there something I have to ajust. I see on youtube people on there bashan 200 doing wheelys right in 1st gear

 

Just to understand you more, are you speaking of reving up the engine and having this issue in first gear? If you take off with normal RPM's and let out the clutch what happens? This is only evident with high rpm's? Sounds like you need to richen the carb. With colder weather, change the clip position of jet needle. I don't have the link, but it is on this forum on how to jet your carb for the different weather.
Hope this helps and I am understanding your issue correctly.