Does anyone know what the factory (09 model) system weights? and are there big gains (or rather losses) by going aftermarket with total system or just slipons?
I prefer the factory sound, but suspect they are heavy. thanks
Full stock gen2 exhaust weighs around 48 lbs. The average single side aftermarket full system weighs roughly 15lbs(some more, some less, they're all different). The only companies I know that make a full gen2 exhaust with dual mufflers are Akrapovic, Brock's, and Ti Force.
Slip ons can save you 10 to 15 lbs, and you can feel that the weight is gone when flicking the bike through curves. The average slip ons will give you about 1 or 2 hp, you'll never notice it. They also don't need a map and a tune. A full system also doesn't NEED a map and dyno tune, the bike will run safely without it. However it's best to have a dyno tune if you can afford it, it will smooth things out alot. A good tune and full system can get you around 10 hp. Keep in mind these are just ballpark numbers also. There are several full exhausts and slipons that are very quiet. Alot of slipons (and some full systems) have removeable baffles/plugs for the ends of the pipes that will keep them around 2 or 3 decibles quieter. Vance and Hines also makes a universal header that works with all slipons(including stock mufflers) it's good because it gets rid of the catalytic converter(I gutted mine on the stock header as it was cooking my feet) None of the full systems have a catalytic converter either.
You'll get lots of opinions on exhausts, but here's a couple examples of popular ones. Yoshimura R-77 slipons have a good sound and aren't loud, and are actually very quiet with the baffles in the tips. If you like the stock sound, theses are good. The Brocks Alien Head full system makes alot of power, but is louder than most folks prefer. I don't think it's excessive(just my opinion) but not something to cruise around quietly on either.
If you listen to sound clips on YouTube, you really can't tell, in person is the best way to decided on something. Most manufacturers post the decibel ratings of their exhausts on their websites, that'll give you some idea to compare to stock.
There are lots of folks running lots of exhausts on here to ask opinions from too.