2-3 jamming up

I'm having the same problem....First trip out and everything is fine, come back check everything out , looks good so I go for a ride. I put about 100 miles on her and loving every minute of it. I decide to get on it alittle bit, the first time was fine the second time it hangs up in second gear. Good thing I left some tools in the car, now any time I get on it, she hangs up. Thanks for some things for me to look into, I'll post on the out come and I hope that it will help anyone else out with what I find.