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Mouth-Watering 1974 BMW R90S Scrambler Is Packed Full of Modern Technology

Scrambled airheads are by no means rare in the custom bike world, but the one we’re about to inspect is infinitely more intriguing than most. It comes from Injustice Customs over in Sweden, a one-man operation run by Anton Knutsson. The build was commissioned by a client from Norway, who’d provided a well-kept 1974 BMW R90S as the starting point.
1974 BMW R90S Scrambler 9 photos
Photo: Gorm Taube
1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler1974 BMW R90S Scrambler
To get the ball rolling, Anton dismantled the old Beemer and had a large chunk of its factory hardware deleted, including the suspension, brakes, and wheels. The boxer-twin engine was then rebuilt with a larger Siebenrock sump and a Silent Hektik ignition system, also gaining some fresh breathing equipment in the process. It inhales via DNA pod filters and expels combustion by-products through a new exhaust.

The headers are bespoke units made of stainless-steel, and they terminate in premium SC-Project mufflers like those you’d find on the MV Agusta F4 Claudio. Aside from the modern ignition, other electrical upgrades include a lithium-ion battery, custom wiring, and a Motogadget mo.Unit Blue control module. Our protagonist had big plans for the bike’s suspension, as well.

Gone are the stock R90S items, making way for top-shelf Ohlins replacements at both ends. Up north, we find inverted FGTR forks originally designed for the R nineT, accompanied by STX 46 shocks with piggyback reservoirs at the rear. Things are just as succulent in the unsprung sector, where you’ll come across 18-inch Sun rims laced to Cognito Moto wheel hubs via stainless-steel spokes. Dual-purpose Heidenau K60 rubber also makes an appearance.

For ample stopping power at twelve o’clock, the scrambled BMW uses dual 320 mm (12.6-inch) floating discs and Brembo M4 Monobloc calipers. On the other end, the traditional drum brake gave way to a drilled rotor, which is also pinched by a Brembo caliper. Seeking to tighten up the creature’s rear-end proportions, Anton swapped the factory subframe with a looped alternative built by a local metalwork expert.

Atop the new subframe is a gorgeous seat with plentiful padding and diamond pattern stitching, courtesy of one Johnny Sadelmager down in Copenhagen. Except for the standard R-series fuel tank, the only other bodywork component you’ll see here is a Rizoma front fender, secured in place by means of tailor-made mounting hardware. There’s an LED headlight a bit higher up, and the aftermarket goodness continues in the cockpit area.

Injustice fitted a low-profile Twinwall handlebar from Renthal, topping it off with compact switchgear, a Brembo brake master cylinder, and a Domino throttle. Moreover, the grips, bar-end turn signals, and digital speedometer have all been supplied by Motogadget. To round everything out, Anton sent the gas tank to Image Design Custom in the UK, where it was finished in a stunning shade of green with off-white stripes.
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About the author: Silvian Secara
Silvian Secara profile photo

A bit of an artist himself, Silvian sees two- and four-wheeled machines as a form of art, especially restomods and custom rides. Oh, and if you come across a cafe racer article on our website, it’s most likely his doing.
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