The canister has a solenoid. I installed a non-SAI tune before unplugging mine so I'm not sure if unplugging the canister's solenoid will give a CEL. If you decide to get rid of the SAI system, make sure to get the bike tuned by a pro so they can get the A/F ratio dialed in. With the right A/F ratio, you should have better emissions than the bike in stock form. Plus, you'll get better fuel economy.