There is no way of bye-passing the immobiliser on your speedfight 2 100 because the immobiliser is a combined unit including the cdi.you can only by a new immobiliser which cost £170 and then reprogramme it with your red master key. if your immobiliser has gone duff it will be because you have been using the red master key as a ignition key and this shuts the immobiliser down because when you use this key it puts the immobiliser in a programme mode, and if you don't complete this procedure it will shut down or your battery has been left to discharge to much causing the immobiliser to become damaged due to currant surges
PAC, July 2005
