It was not going to see any use on my bike. This Hyper even after I'm finish modifying it will be stocker than anything else I own. I'm not touching the inside this engine, just the bike. Good luck and enjoy...
My new 939 has a Euro 4 compliant exhaust. A good five inches longer than the 2015 821. And heavier and quieter.
Disconnecting the exhaust valve and swapping to the lighter, smaller and noisier oem 821 muffler should be enough for me.
I may still upgrade to an aftermarket but going to try this for a while.
