yamaha11 Posted October 19, 2009 Report Posted October 19, 2009 im thinking of having my 421 dune ported, but i dont want to lose what bottom end is there now. do you think it will make a big power difference. thinking of having herr juggs port it. any ideas Quote
sToCk7miLL Posted October 19, 2009 Report Posted October 19, 2009 im thinking of having my 421 dune ported, but i dont want to lose what bottom end is there now. do you think it will make a big power difference. thinking of having herr juggs port it. any ideas i would call and talk to kevin.. .. he will be able to tell you what you want to know as far as porting wise... you usually have to give up sum bottom end in order to get topend. .. well unless your talking Powervalve .... Quote
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