I have a 2002 ZZR1200. I just paid a reputable person in California to clean the carbs. Before the cleaning, the bike idled perfectly, but I had problems with acceleration in mid range. Now, with the cleaned carbs, the bike will not idle. I rode it twice. The first time, it still did not idle, so I took it for a ride to perhaps clean it out. Still would not idle. I did the air fuel mixture adjustment, turned out 1.5 turns. It idles better/longer, and, the mid range acceleration is crisp...
ZZR1200 Carb Idle
ZZR1200 Carb Idle