well, I just found out that my quad has a UNI pro flow kit, and that I am still not runing lean. Just want to know if I could run without the airbox lid, seeing that I am not running lean as it is right now with the pro flow kit. Thx.

 

If your arent running lean now, are you running rich? If your plug is black, you could try just removing the lid to lean it out a tad. But if its good right now, id leave it because taking off the lid might make it run lean, which is not good. So if its good now, just leave it. if you would like to run it no lid, you will most likely need to rejet it. Just keep checking your plug and see what its doing.