PRO STOCK
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1,100 pound weight Limit.
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Maximum tire size: 26x12x12 (can be sharpened).
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Steel or billet flywheel required when running over 4,000 RPM.
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Must have scatter shield (positioned opposite engine side of camshaft) on one cylinder engine; must be 1/8th inch steel or 3/16th inch aluminum; shield must be attached securely at top of engine and at the bottom of engine; minimum of 7 inches wide; on twins – 1/8th inch steel or 3/16th inch aluminum on external sides of engine cylinders, extending from head gasket to frame, full width of crankcase (running over 4,000 RPM).
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No pressurized fuel tanks or nitrous oxide.
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All flywheels, clutches, belts and pullies must be covered with 1/8th inch steel, 360 degrees.
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Drive shafts must be covered or have drive shaft loops.
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Fire extinguishers required on tractors running alcohol.
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Fire suit and approved DOT helmet may be required; must be properly used.
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Kill switch required; must kill tractor and shut off electric fuel pump.
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Dead Man throttle required.
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Pro Stock - no motorcycle engines allowed.