I just got into my first buell and 02 xb12s. it has a D&D exhaust on it and being new to this all I have two questions please.

1. the bike runs like it is carbuerated and tuned to lean (sputtering and spattering for about the first 10 minutes of run time regardless of warm up period). Suggestions????

2. the D&D is too loud for me. suggestions for a quieter exhaust system(muffler)? do i have to change out the entire pipes or just the muffler?

Thanks from a rookie sportbike/buell owner.