hi all. i asked this question few years back, bout last time i really messed with this bike. but i have a stock 03 blaster that will not run with the air box lid on. i can run the mixture screw in and out all way and no difference if the lid is on. the only answer i got last time was leave the lid off. thats not an option for me. its a stock bike should run fine with the lid on. any help is greatly appreciated.