lurching

Started having a weird issue just recently that I've never experienced before. When closing the throttle full in 3rd gear at around 85kph or 4k rpm the bike is very jerky or stuttery. The bike lurches forwards while decelerating until the rpms drop low enough and then it goes away and...

I'm having an issue maybe someone can help me. Recently had the bike serviced and switched to map 2. I have the Evo airbox, Leo exhausts, and 520 chain conversion installed. After coming back from the dealer in gears 1-4 up to about 5000rpm she sort of lurches. It feels like a lack of constant...