Each bike can only have 2 fobs assigned to them at any one time.
New/replacement fobs can only be coded to the bike using the dealer digitech , takes 20 minutes or so. Fob plus coding around $100
So if you "lose" an original one , then get the dealer to "code" a new fob to the bike , then find the original , the "lost" original will not work.
Double check the new fob battery you have is good , AND that it's in the right way round
Also check that the little prongs the battery press into are bent up enough to make a good contact, I had issues because of that with one of my fobs.
Cheers
