a/c to d/c conversion

HI ,everyone out there. Gramps,here,just solved one top problem and ready to boggle my 60 year old mind again( wished I've done all these brain storming years ago but I am here now so).... Iam a pack rat, according to the little lady and I like saving things that maybe I can put to good use someday or the " you never know it may come handy" stuff. Anyway, after I tackled that last challenging job about my li'l scooter I came across with a garage door opener motor that I put aside when I replaced my son's with a new 3/4 hp. Now, the light bulb came on last night about how I can put that motor to use besides a bench grinder.( I was able to convert an old vacuum motor into a leaf blower or blowing dust off the garage floor instead of using water = savings). I need some input on how I can power this up using a 24V system. It's slow on rpm but torquey that I'm thinking of using it on my old bicycle without spending that much for a hub or e-engine. What I'm trying to do here is make use of what you got and V is for voltage forum is what got me surged up and like coming back with lot of interest and ideas once again. I am retired and partially disabled so this is the best therapy for me right now that I never knew existed, Thanks V is for voltage, I hope guys won't get tired of hearing from me especially if i come up with some odd ideas. gramps.