I wrecked it last year and it needed new mufflers on it(and a lot more). I thought that it would be a great time to get the Yosh cans and let the insurance pay for them. Once the bike was all back together I had the shop dyno it to make sure it was running right. That is when they found out the it was only making 115 HP. The tried to fix it but couldn't find out what was wrong with it so they blamed it on the cans. I was told that I needed to get it dyno tuned but they couldn't do, so I had to goto another shop. Once that shop got it on their dyno and started adjusting and only got about 5 HP more bringing it up to 120 HP, they knew it wasn't the mufflers. They told me that they had seen others that had the chain off a tooth and that I had to bring it back to the shop that did the recall. So back I went. When I told shop #1 what shop #2 told me they weren't happy. They said that they would open it back up and check it out but if it was right I would have to pay 2 hr labor. But, if it was wrong they would fix it at no charge. So of course I waited right outside of the shop watching the mechanic work. I wasn't going to give them the chance to try to screw me. As soon as I heard one of them say it was wrong I ran in to the shop and said "O' Really". So they finally got it right after a few attemps. After that I went back to shop #2 and got it remapped again. That is where it is now with 158 HP.