2005 GSXR 600 w/ 14k miles. Completely stock except for a Yosh RS-3 can. Ran fine on my way to work, then when I went to start it after work it started acting up. Symptoms include: * idle is rough * plugs were/are jet black (replaced them only to have the new set get fouled) * when idling in nuetral if I rev the engine its dies on the way back down * while riding it will backfire flames out the exhaust, and surges power. by surging power I mean, Ill give it gas and it will start to pull, then cut out, then start to pull again, then cut out, then pull, etc.... *black smoke coming from exhuast, when I rev engine. Dealer mode is showing no errors, C00. I've changed the plugs, air filter, battery, checked all connections, drained fuel and added different gas, adjusted the tps sensor, swapped ECU's, and I think thats about it. Now I'm stumped. What else would cause the bike to run rich? Anyone had this problem?