It's not a Brit bike Jon, primary drive is directly geared from crank to outer clutch basket. :
The clutch sounds OK if it won't start without it being pulled in. Agree on the possible bent selector fork if it was kicked into gear with the engine under load after hitting the false neutral. Probably an engine out and split the cases job, I'm not aware of the ThunderCat being reknowned for in-situ gear selector access...