also on the motor you are using it would also be wise to get a TT01 tuned gear set so you can gear the car fro more speed or to suit teh motor you are using.
The std kit comes geared shorter and even with the silver can motors just chnaging to teh 25t pinion and 55t spur makes a huge difference.
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0