91' CB250 custom exhaust tuning?

cbdork190

New Member
I'm replacing the stock, double wall, chrome plated, heavy ass exhaust on my nighthawk with a custom (home made) ss 1.25" system and Vw 1.5" chrome flared tips.
The id of the the stock piping is .900" and the id of the ss piping is 1.100". That is actually 50% larger than stock. With all this extra flow I figure some sort of tuning is in order.
This is where I need help. Is baffling an exact science? Will an h-pipe help? What about an h-pipe with a butterfly valve?
 
You'll be OK, it will lose a little low/mid range torque
You will have to increase jet size slightly for exhaust, if you keep stock airbox it will make life a LOT easier
 
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