Fortunately, I had the presence of mind to ask they retain the stock brass after they told me the bike needed this aftermarket kit based on the K&N air filter in the stock air box and the Delkevic exhaust. After picking up the bike from the shop and riding it that day, the pig rich conditions were present (throttle stumbling), I was just too green to recognize them. I called them a day or so later to ask them about it and they did offer to have another look at it, but it was running so poorly I didn't think I could get it over to them. They also took the better part of a month when they "fixed" it before, so I didn't want to end up in another queue. Hence, I started pestering Cal about it and here we are. I will give them a call to explain the situation, but based on not giving them the chance to fix their own mistakes, I'd be surprised if I can haggle any kind of refund. Even if I had taken it back, I seriously doubt they would have gone to all the trouble Cal did to clean and replace the stock brass and get it running properly. An expensive lesson to learn, indeed.