Running rich

Why do you say the ECU was the problem. I was going to chime in because I am having a similar issue. The bike is just running way to rich and I have zero mods. I have checked every vacum line and even replaced some items. The shop here charged me around 100 dollars to look at the bike and they did fix it. They said it was a vacum cap on the front of the number 2 or 3 carb. They put a new one on and bingo the bike was running fine again. Anyway, now it is running rich again... I can't stand it! tell me more about the ECU issue and how you figured it out. Thanks!
 
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