Flat spot, backfire

Joined Jun 2014
3 Posts | 0+
Gold Coast, Australia
Hi All,
Just purchased and installed a new Arrow Titanium slip-on to my 2013 Strada. first test run without DB kill i found a large flat spot when you bring on the throttle after deceleration, also back firing during flat spot. I then installed the DB killer, this test ride was a lot better. the flat spot was random now and not as much backfiring. so now i have the standard slip-on back on and bike is back to being smooth. Whats the go? do i need to get it tuned? disconnect the power band servo? Has anyone else had this issue?