My ignition key has a 3-digit code on it. I spoke with a locksmith who said that was right. Just to prove how right it was she cut me another from that code. Here in Australia, there is a Honda Riders' Club which has a 24/7 roadside assistance programme called "Honda Rider Assist" (funnily enough). I'm a member, and as part of the registration they require your key code. Why? Well, part of the service is, if you lose your key and you ring for assistance (a 1800 number) they will find the nearest locksmith, and have a new key cut and delivered to you. So, where is my spare key you ask? Ha ha. I know where - you find it! BTW, if you have a spare key cut, ensure you have the code stamped on the new one. Never know when you will need it - again.