Thank you for the information.
200ft/sec I never imagined that, may be simulation is 10 to 20% deviated from real life but this much!
I want to avoid over scavenging but still want back pressure to be zero I know it sounds funny but if I allow over scavenging then mileage of bike will reduce drastically and consumer will not accept that (this is what I think).
Can you PM me some links for literature on exhaust or some books you can suggest.

Sorry for the wrong speed of flow gases.
I simulated the model again and find out that i was not giving the correct temperature parameter. Now it is giving approximately the same value as you mentioned 314 ft/sec.

Then I think u plan to go for it, so take a survey (through dealers) and see which city/state has the maximum demand and whether their demand will fetch you profit or recognition. Recognition is more important and if you get that profit will chase you....

All the best

Well said indeed!!!

@amandeepkamboj19; just a suggestion; you could start with the book 'Four Stroke Performance Tuning' by A. Graham Bell. It contains a chapter that deals with exhaust pipes and headers in great detail. However, as pointed out this will only be the beginning of your journey...

I am prepared for every obstacle no matter how hard I have to work, how long I have to work I will not turn my back. As of now my only constrain is my working hours, I get only 4 to 5 hrs a day that to at night to work on these projects.
@ arunmhetre2290 I am not asking for your data (i know it takes hell lot of efforts to build an archive) but at least you can show me a way.

No problem feel free to contact me at [email protected].
A post on same topic by abhimanyu31 for 'Four Stroke Performance Tuning' by A. Graham Bell is a good book to start, you can find it easily through Google search its a PDF.
the words in this book some times talks in two terms so be sure to understand it properly.

Not True. A well designed exhaust will enhance fuel efficiency and will indeed keep the engine more reliable than with your stock exhaust system. Having worked and simulated 4-stroke engines for over half a decade in racing and street builds, I have enough data of the principle. I happened to see the pics of the exhaust you built and must say, you have a very long way to go. A pipe, muffler does not do the job. And psychological horsepower does not help. On my Honda City Vtec, I built my first tuned multicylinder exhaust with the stock engine and made ~10bhp at the crank on the dyno. There is a lot that goes into making a harmonic system work than with mere shiny SS pipes and mufflers. The science behind it will make you slog for decades. No books and theory can teach you the real insight. It can only take you to a certain level. After that, its your own development which can take the game forward. My scale went up real high because ever since I have been developing engines, I have been racing them and my street versions are mellowed versions of the race versions. It cant go wrong ever.

@ Joel
I have just started building exhausts and currently these are not for consumers, i am in learning stage and without preparation i will not sit in exam. As i said already i want experts inputs to find my way.
This is my first exhaust and have learned lot form this, will continue my experiments until i built something which actually increase performance.

I started working with perceptions and slowly coming to real life situations.

Thank you for the feedback

Ahhh.... the guru finally speaks