the stock Hyper tank is terrible IMHO... causes half tank lean pretty badly.... very poor and stupid design if you ask me, the tankis built like an upside down pyramid......

Anyone having any tuning issues with a motor int he Hyper may be fighting the fuel tank not the motor... tuning improves drastically when you use a Mugen tank instead.... good luck trying to dial in a Picco 28 on the stock Hyper tank LOL !!!