Wired News: Speedy, Tiny and Troublesome Popular in European racing circles for years, pocket bikes have recently exploded on the scene in California. From Wal-Mart and Kragen Auto Parts stores to eBay and bulletin board mecca craigslist, gas-powered and electric versions of the tiny bikes are being bought, sold and ridden all over the San Francisco Bay Area. Though the top pocket bikes can cost up to about $3,000 and are made by Italian companies like Polini and Pasini, low-end Chinese bikes start at under $200 -- affordable for many teens, like Walstra, who want a cheap feel of what it's like to ride a motorcycle.