Joined Jul 2016
69 Posts | 0+
Glendale CA
I can't really do any mapping or exhaust upgrades other than termi through the dealer. I bought a 5 year warranty and the dealer was specific about what after market parts I could put on without voiding. I'm happy with the stock exhaust and the 939 certainly has enough power for me.
Yeah from what I heard the 939 isn't as jerky or doesn't surge as bad or at all as the 821.
Keep posted man on your upgrades.
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