Owenski

For the mis fire thing I'd look at the choke plungers and then at the Reg/rec either can be known to cause these same problems. If the problem is only occuring when running the bike on a wet road or after washing it then its none of the above and all you'll need is a fender extender. What is happening in this event is spray from the front wheel is wetting the front cylinder spark plug and it takes a couple of fires to dry it out.
As for the brakes I've no idea but squid or YC will be along soon enough to tell you what to look for there.