There are many ways to get more torque and power out of a small engine without removing the governor, here are some of my techniques.
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MY OFFROAD LAWN MOWER
TRACTOR: Craftsman LT1000 (2002?)
ENGINE: Briggs I/C 16.5 HP Cast Iron Sleeve
REAR END: MST206 (6 Speed)Peerless Transaxle
TOP SPEED: 11 MPH (17.7 KM/H)
RATIO(Before Tranny): 1.3:1

MY WELDER: Clarke Weld 130 MIG Gas/No Gas
HAND TOOL OF CHOICE: Craftsman
ENGINE OF CHOICE: Briggs and Stratton