Forgive me for what I am about to say, but I am old enough to say it and your likely right to disagree with it, seat belts please, PERSONALLY I don't think the mufflers have much to do with it very often anyways not for the street, just my opinion, now if you managed more air in a little more compression don't forget the 1:1 so more gas for the fuel hands down combustion changes and flow follows exhaust too, I know I know what a ridiculous thing to say..
Jason the o-rings flatten and loose there efficiency, I do appreciate your ambition and sticking to resolving the issue, think if I were in your shoes I would drop the main needle - at that rpm your past what the pilot will adjust the fuel has to be coming from somewhere it just seems that the carb setup is wrong? Needless to say we all assume you set the throttle plates correctly at the start right?
imagine paying for a set of pipes expecting more power and zip, why? "of course they breath too well - you have to change the jets to release that power", smart right to get the HP from the muffler you need to re-jet, if we re-jet do we not have more bang assuming we have enough o2 in the mix but where did we change the compressed volume that we need to exhaust, same stoke - same piston - same chamber same CC, I must be missing something![Not talking](https://katriders.com/core/images/smilies/eusa_snooty.gif)
Don't miss understand I'm all for both and anything that helps a carb deliver it's potential is generally a good investment, the muffler is easy to feed the piston will do that based on stoke and valve timing.
just an opinion
Jason the o-rings flatten and loose there efficiency, I do appreciate your ambition and sticking to resolving the issue, think if I were in your shoes I would drop the main needle - at that rpm your past what the pilot will adjust the fuel has to be coming from somewhere it just seems that the carb setup is wrong? Needless to say we all assume you set the throttle plates correctly at the start right?
imagine paying for a set of pipes expecting more power and zip, why? "of course they breath too well - you have to change the jets to release that power", smart right to get the HP from the muffler you need to re-jet, if we re-jet do we not have more bang assuming we have enough o2 in the mix but where did we change the compressed volume that we need to exhaust, same stoke - same piston - same chamber same CC, I must be missing something
![Not talking](https://katriders.com/core/images/smilies/eusa_snooty.gif)
Don't miss understand I'm all for both and anything that helps a carb deliver it's potential is generally a good investment, the muffler is easy to feed the piston will do that based on stoke and valve timing.
just an opinion
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