The Wisconsin Lawnmower Racing Association is a local chapter of the USLMRA. We run 6 Adult Classes and 2 kids Classes in our shows. Our mowers are capable of speeds in the range of 60 MPH with some doing over 80 MPH.
Our classes are as follows:
Using the USLMRA Superstock rules in the rulebook
Pro-Stock Single-Ungoverned Stock Single Cylinder Motor
Pro-Stock Twin-Ungoverned Stock Twin Cylinder Motor
IMOW-Single Cylinder Valve in Block or OHV Not to exceed 15 HP
A/P-Valve in Block 4 Stroke engines 8.5 HP maximum
S/P-Valve in Block 4 Stroke engines Over 8.5 HP
C/P-All Single Cylinder OHV and Twin Cylinder Valve in Block Under 20 HP
B/P-All OHV V-Twin 4 stroke engines 20 HP and under
F/X-Maximum Displacement 465 cc Single Cylinder
KIDS CLASSES
J/P-IMOW Rules (10-15)
Stock-Take the blades off and come Racing (8-15)