I pull a little trailer w/ all my work supplies.... 50-70 lbs.... I'm thinking a pipe will get me the most bang for the buck.... What about the reed induction?? I've read it gives good low end boost.... I have the wide port china.... I put an iridium plug on and it helped w/ the bogging.... I have the 44 t sprocket and its about right for cruising at lower rpm's... wouldnt want to go any bigger, would have to wind it up too much to get anywhere.... I know a jack shaft would solve all my problems, but not on this bike....I'm savin that for my next build... 29er..... Thanks for input..