Honda’s SL100 was a lightweight dirtbike that won a lot of fans in the early 70s for its easy handling and high-revving OHC four-stroke motor. Today an SL is a collectible item—especially for guys who were lucky enough to ride one in their youth—and you don’t see many given the custom treatment. This neat 1972 SL bobber looks a million dollars, but incredibly, it was built for the Dirtbag Challenge, a ‘low rent chopper build off’ held every year in San Francisco. The Challenge costs $20 to enter, and the rules are simple but strict: no Harleys, don’t spend more than $1,000 on your bike, the bike must be rideable for several hours, and you have a month to build your bike. Makes that SL even more impressive, don’t you think? Dan of the Lilac Alley Speed Shop has catalogued the build on a blog here, along with some great photography. [Via Chalopy.]
