[Jager]

The clutch switch could be bad, can you bypass and test?

The battery cables could be corroded and not providing enough current to the starter, inspects the battery cables not just the terminals. We have seen cables corrode and break apart.

Check connections to the starter.

Ignition switch could be bad; this is a common problem area.

Electronic Immobilizer might be preventing you from starting if the induction coil surrounding the ignition switch is not recognizing the transponder in your key.