Having balls is totally different than having top speed. The EFI will help accelleration however the motor is only going to spin so fast say it goes to 11000 rpm that is the the highest the motor will spin no matter what you do to the motor. However some exhaust mods will help raise the RPM if it is not goverened by the CDI. I think?
I am sure it is fast off the line the Direct drive is a really hot setup but it won't change the top speed. The only things that change the tops speed are the motor, Top Gear, bottom Gear, Track Size and paddle size, RPM, and a few other things I am sure I am missing.
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