hey all, for all of you with aftermarket exhaust, those are pretty much str8 through design, right? how important is backpressure in these bikes? i modded my exhaust and took away alot of backpressure, just want to make sure evrything will be o.k.
also, whats the outlet size on your exhaust?(if you have aftermarket)

thx a bunch in advance!!

 

I have an older Two Brothers slip-on which is affectionately referred to as "the tennis ball launcher" and I've been riding without a power commander ever since...the bike runs perfectly; although, a PCIII could even out the idle a bit I'm sure, so when I turn her into a dedicated track ***** I'll treat her to a PCIII, but I have no plans as of yet.

Oh and in reference to your question...a slip-on has enough back pressure to keep the motor happy

 

i thought i heard something about damaging valves from lack of backpressure, not sure if that applies to sportbikes.
heres a lil' clip of my top-secret mod(very dark and a lil' loud for my camera, but trust me its f-in sick soundin.) i'll try to get a better one up, this ones only at about 3,ooo rpms (didnt want to wake the neighbors)
purrrrr

 

Like I wrote, a slip-on will have enough back pressure because it still has an exhaust canister, but I wouldn't run a straight pipe.