Most custom builders are low-volume guys. It?s often a sideline to a day job, or part of a wider operation selling parts. But there are a handful of companies that have a veritable production line, and in Europe, one of those is WalzWerk.
?We build around 50 of our ?Schizzo? BMWs per year, which is one bike per week,? says founder Marcus Walz. ?All the bikes?the Roadster, Cafe Racer, Scrambler and Bobber?are based pretty much on the same concept.?

?But once a year we build a very special Schizzo, and this year it is this ?Monza,? which is inspired by old GP bikes of the 70s. Hence the reason for the nickname.?
?Monza? is a fantastic blend of minimalist and retro cafe racer design, based on a 1989 monolever R100 RS. And it weights just 168 kilos [370 pounds] with five liters of fuel, which is a drop of around 50 kilos on the stock R100RS.
?As always, we took the bike completely apart and rebuilt it,? says Marcus. ?So it?s pretty much a brand new bike with an old title. It’s a real old bike, and not a faked retro bike. I believe this is why our production bike line is successful.?
WalzWerk have stripped all unnecessary brackets off the main frame and replaced the entire rear end, including the seat, with their classy in-house product. It?s a stepped design available as a complete kit, with no welding required.

The new frame bolts right on to the existing brackets of the main frame, and is already fitted with brackets for turn signals, a seat and the rear fender...