Hi, check your tps, I just used the dash mode to do mine as it was out when I got the bike. It made a noticeable difference with the fuelling down low. Another cheap mod is get the throttle tube of the latest Katana it uses a different cam and smooths out the initial part of getting on the gas. Another tip is remove excess throttle cable slack. When I picked up my bike it was terrible but doing these 3 easy mods have made a massive difference.