removing the pair without a pc can apparantly lead to some backfires , with some brands of pipes . And backfiring means something aint right . I have tuned bikes to get rid of backfiring on bikes with after market systems lots of times.
Contrary to popular belief, it's not always because of too much juice(running rich) it's because their were runnin' lean.
If yer runnin' lean,you can usually expect an extra horse or 2.
You can also expect to run hotter . Back pressure has changed .... yadda yadda yadda .
If it was me....leave the pipe off,till you decide on something to re-map . You bought a pipe,removed the pair,to get more horse....great...get more horse....I'd just be doing it right . I'm trying to decide on a pipe right now,aswell . First thing I did was checked around to find the nearest shop with a dyno AND preferably an' exhaust gas analyzer. May aswell do it right . I'll want to be in there too, doin my own calculatuions also . Not a pro....but I love to learn .
Have a good 1....