First of all thank you for your help. I just got a brand new WR and I want to in cork it. This morning I removed the exhaust baffle in the stock can. My bike did not like it at all. It would start warm up and shut off. If I'm not mistaken I think removing the restrictive baffle creates a lean mixture and the ecu protects the bike by shutting down. I started it about 5 different times. Each time it would shutoff. I decided to put the baffle back in and it idles like it should. What do I need to do to let the ecu reset? Do I just disconnect it from the battery/reconnect? Also... After seeing how crazy restrictive that muffler is I'm going to be adding a slip on muffler to my mod list. And, I've got the comp ECU coming. Thanks for your help and advice.