Exhaust changes?

[Stlhead]

So, the question to anyone who has junked the stock muffler but not gone turbo. How does it run? Does the fuel mapping still work? It is my understanding that there is no O2 sensor so the brain will not know there is more airflow, but the sled seems a little rich stock. Or is an after-market fuel system controller required?
Thanks guys.

 

[firecat99]

from all the yamaha guys ive take to is that the brain remaps herself for the exhaust, really the whole this is weight is like 7bls saving as louder and looks better, its the same as the phazer and like anyother snowmobile, a can is just more flow

 

[Roly]

I.ve gone to a Hindle can and now I think it's running too lean, and am wondering if i'm going to have to remap or buy a controler. I'm gone to talk to Alpine when I get back out there. That been said it pulls nice and sounds bloody awesome, Alpine did the CR tunnel and seat for me, real nice job!