most stickers of a certain age will be solvent based adhesive - white spirit, a dab of unleaded, possibly (though unlikely) meths, may well soften the glue and remove the remaining adhesive. You could also try a paint thinners or solvents (cellulose thinners, humbrol, etc).
Though I'd say these are very unlikely to damage proper anno - as suggested above try on an inconspicuous area 1st - the wife's bike for example
Like a fish ever needed a bicycle anyway...MTB: '89 MF Alu Team Pro,'88 Muddy Fox Courier,, '92 Orange Elite (now 17"!), '04 Kona Fire Mountain (now Son's), '96 Muddy Fox Ranger home-build (son's), Specialized RockHopper '92 (Ad's retro-build) ,'02 Kona Scrap Special Edition OB (3rd Son's), 1989 Orange Clockwork (Gone!?)
ROAD 2013 Orange CarbO ,2012 Basso Devil (3rd son's), Colnago CLX3.0 Di2 self-build