DANGER WILL ROBINSON DANGER said the robot, flailing his arms-
If you have a belt drive, making the driving pulley bigger, or the driven pulley smaller, will increase speed, decrease torque.
Of course, there is always the Nitrous Oxide bottle.....
However- keep in mind- with the deck removed, the center of gravity just got quite a bit higher than it was- sharp cornering at higher speeds than designed for can cause you to regret the lack of a roll bar.
Before you try this, in recognition of my effort to aid you, can you mention me in the will for a gun or two?