some buddy,
since it's already setup for an aftermarket engine you could probably get by with sticking a 16hp clone in it for not much cost. I believe the honda 24 is one of the cheaper (less expensive) vtwin engines so the replace cost won't be as high as it would say buying the whole kit. last I remember they were around a $1000 give or take. once they have a hole blown through them they're not much account. maybe the heads are still good....maybe.