jst racing

any info on why my banshee runs great when its in netural but soon as i put it in gear it boggs down till i get in the power band.it wont spin tire off the go.even in the power it dont seem wright.its like there is no power.sometimes it there and most of the time its not.i just rebuilt the motor.it has mabey 8 hours on it.any info would be great.its geting me mad.i am ready to cut it up for scrap.thanks in advance mike

do you still have the axel.if so i am intrested in it thanks