If you have a meter, check the battery. If the battery tests good, check ignition switch using a 12 volt test light, and work your way to the starter using a test light. If key switch is good, check selenoid with test light. Next you'll .want to test at starter. The key switch should have one ground, one constant hot, one hot in start position only and others that are hot when ignition is on for accessories like lights. You may have also damaged a safety switch if there is one near the impact area. If switch is ok, the selenoid will have one wire that gets power from the ignition switch when it is turned to start. This wire activates the selenoid to allow power to the starter. The selenoid should also be grounded. Some ground through the base and others use a ground wire. If you have 2 cable terminals on top and 2 terminals near the base, you should have a ground wire, and a ignition wire. If you only have one terminal near the base, this is the ignition. As I previosly stated, also check any safety switches that may have been comprised. There is the nuetral switch, blade switch, and a seat switch. Not familiar with your machine so I cant pinpoint the locations of these safety switches, but a bad switch will cause the symptoms you describe.