Ok good, If it was bouncy its a sign that your rear shock needs a rebuild.

I might have a stock front break master cylinder laying around. I'll check. If you cant find a thumb throttle you can always use one from a Honda 400ex, I ended up getting a billet setup for the 400ex and its worked great. Also a front master cylinder from an LTZ400 will work for your bike. If I remember right, you need to use the bolt from the LTZ to hold the brake line on, and the LTZ lever.