1977 BMW R100RS Cafe Racer by Roughchild Motorcycles
Vehicle Details
- Year: 1977
- Make: BMW
- Model: R100RS
- VIN: 6180520
- Mileage Shown: 613mi (TMU)
- Transmission: Manual
- Title Status: Clean
- Color: Tundra Green
- Seller Type: Private Party
- Location: Vienna, VA 22182
- Lot #: V-0045991
Representing the inaugural year of the /7 series, the 1977 BMW R100S and R100RS succeeded the legendary R90S. This 1977 example has been re-engineered with 21st-century technology by Roughchild Motorcycles in Los Angeles, California. The bike was fully disassembled, rebuilt to exacting standards, and upgraded from the frame up for enhanced safety and performance. Professional restoration and thoughtful mechanical upgrades ensure a unique riding experience. Key upgrades include an LED headlight, zinc-plated hardware, SunRims aluminum rims with stainless steel spokes, Brembo brakes, Ohlins shocks, a Cone Engineering full stainless steel exhaust system, and more. Having been driven approximately 613 miles since its restoration, this example is now being offered for auction by its seller out of Virginia.
Constructed on the R100RS, the restoration emphasizes the bike's classic café racer style. The frame was repaired, braced, and factory tabs removed before receiving a gloss black powder coat. The gas tank, front fender, and headlight bucket were refinished in Tunda Green Glasurit paint, adorned with hand-painted pinstripes and BMW roundels. A custom subframe with a flush-mounted brake light and turn signals was added along with a /5 headlight bucket and LED fixture. A new Motometer speedometer incorporates a tach and indicator lights, while the hand controls are new OEM units, modified for the custom wiring harness. All original hardware was zinc-plated. It rides on 18” SunRims aluminum rims with stainless steel spokes, wrapped in Bridgestone Spitfire tires driven approximately 600 miles. Detailed images are provided in the gallery.
The original 1000cc two-cylinder boxer engine is said to have been rebuilt to factory specification, generating as much as 70 HP and 56 lb.-ft of torque to the rear wheel through a 5-speed manual transmission. The big valve heads feature valve seals and an electronic ignition system powers a single dual coil mounted under the tank. Jetted and tuned Mikuni carburetors enhance performance, and the factory airbox was drilled in the style of a 1977 R100RS. A lightweight high-torque starter complements the lithium battery, which is safely housed under the gas tank. Additionally, the factory charging system has been upgraded to a modern unit. Up front, Showa USD forks are mounted via a custom triple tree, while the rear suspension is handled by Öhlins shocks with external reservoirs. A full stainless exhaust system, including quiet-core mufflers from Cone Engineering, enhances both performance and sound. Brembo radial calipers, powered by an under-tank master cylinder, provide exceptional braking. No outstanding maintenance items or warning lights have been reported.
This sale will include a clean title and a battery charger.
The seller would like you to know: “I bought this example from the person who originally commissioned the build, and it has been stored in my garage since. It is a truly amazing R100RS with only 600 miles by the famous California builder Roughchild, finished in Tundra Green. The result is a classic cafe racer with modern handling characteristics, excellent brakes, and ample power.”
Auction Results
- Highest Bid: $10,250
- Auction End: Jul 18, 2024 06:45:39PM UTC
- Number of Bids: 15
Comments (20)
Highest Offer Received $13,000.00
Bid in the amount of $10,250
Bid in the amount of $10,000
Bid in the amount of $9,750
Bid in the amount of $9,500
Bid in the amount of $8,750
Bid in the amount of $8,500
Bid in the amount of $8,000
Bid in the amount of $7,750
Bid in the amount of $7,500
Bid in the amount of $7,000
Bid in the amount of $6,000
@artichoke it's just a model name we coined for the style of bike we've been building. You're looking at an airhead with an R100RS drivetrain in its numbers matching frame, converted to short wheelbase and styled as an R75. We eventually dropped the RSWB engine badges and call this The Cafe Racer. We also build a Bobber and an Adventure Bike based on the G/S. I encourage the winning bidder to make contact after the auction to arrange for updates and service.
@artichoke I think the builder wanted to show it’s a short frame, but has the big engine (1000cc). The bike is incredibly light and the short wheel base makes it very maneuverable.
Why does the engine case say R75RSWB?
Bid in the amount of $5,000
Bid in the amount of $1,500
Bid in the amount of $1,000
Bid in the amount of $250
I'm the seller, let me know if you have any questions.