Severe jolt with new slip-ons

[mikedirty]

I'm new to riding. I have an 03. Just recently took the stock cans off and put on some custom shorty pipe slip-ons. Now when I get up over 100mph from time to time, I don't know how to explain it but my bike will jerk/lose power momentarily/backfire/surge, almost to the point that if I'm not paying attention, I could go down. This has also occurred under 100mph. No other mods have been done besides the pipes. Does this problem mean I need a PCIII and Dyno tune?