ask this ? once already just getting a few more opinions looking for a big bore for my 02 yamaha viper want the most hp right now im running slp triples should i change pipes if i get big bore and what is reccomended ive heard 780 bb 835 bb and 900 stroker any suggestions also who should i buy from? 
Just go reread the last thread you started. Everything you want to know is in there. It's all about how much you want to spend and who you want to do the work.