May 7, 2017 · a shafty is a shaft driven clod.. single motor running 2 shafts 1 front 1 rear.. a dual motor unit one on each set of tires.easy 4 a 540 brushless to have same or better torque on 12.6v,,,22t brushed has it limits like you found brushes com cutting.. spacers in com to prevent slope..you can go to 1000kv but top speed will be limited..id go with a 1800kv.. expect back flips on punches outa the ...