Not a problem ecu thingy works i all out. If your changing the air filter as well to say a K&N then get it checked on a dyno, just to be sure. Makes massive difference to performance when you add a full remus exhaust.
thanks for the info mate helps when you guys have already know how to sort these things only had gs since april so just startin to get to know my way round the bike had a few probs to start with abs/rear brake caliper so did not want to fit this an blow up the engine