Has anyone used a serpentine belt and pulleys from automobiles on their motorized bicycles? Belts come in all sizes and lengths, short and super long. I've seen some that might be too short, and some which might be just right for my intentions. Some are .56"(14mm) wide with 4 ribs. These are 775mm(30.5") long. They might actually be too short for my needs: http://www.ebay.com/itm/Serpentine-...ash=item51e1d4f7ab:g:8U4AAOSwjDZYl3AW&vxp=mtr http://www.ebay.com/itm/Car-Alterna...a335336&pid=100623&rk=3&rkt=6&sd=351681181611 I might need a 1500mm(59") serpentine belt, like this one: http://www.ebay.com/itm/Serpentine-...ash=item3adbf5b3ca:g:kcEAAOxy69JTD4OX&vxp=mtr I'm trying to link TWO pocket bike engines to a single driven pulley at the bottom bracket. Thanks for any help.