KUMPAN
BMW R80RT 1987
The design speaks in straight lines—a clear contrast to the curves of the original bike. A custom engine cover gives the motor a sharp, upright edge, while the tank leans softly in the opposite direction, bringing the whole composition into a quiet harmony of deliberate, linear balance.
The original EARTH triple tree features a seamless design with flush, custom-perforated nuts—echoed on the rear shock for a cohesive look. The variable tachometer mount supports four different Motogadget speedometers, offering both flexibility and precision.
It is all about alignment and flow. The tank and seat connect in a single, uninterrupted line, mirrored by the geometry of the custom engine cover, low-slung exhaust, and the straight arm of license plate holder. A bold front light mask brings the whole composition together, reinforcing the bike’s commitment to straight, purposeful design.
A unique engine cover gives the motor an upright edge.
The tank aligned with the engine in one smooth line.
Even the Seat loop lines up with tank and engine.
Finishing with the straight arm of license plate holder.
Matte black dominates the surface, accented by subtle orange touches. Beneath its vintage frame lies state-of-the-art electronics, carefully concealed—while on the outside, modern design elements take the spotlight.
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Rear lights
Rear lights, turn signals and brake lights integrated in one smooth stripe by Motogadget. Together with license plate mounted on the original EARTH R-series side mount.
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engine cover
The distinctive EARTH R-series engine cover echoes the original engine’s fin pattern while cleverly channeling airflow through its integrated vents.
DETAIS MATTER
Every element on the bike is part of a carefully composed whole—nothing stands alone. From the color palette to the materials and textures, each detail is considered. The leather seat, stitched in a signature pattern, ties in with the grips, while the brushed finish of the cylinder heads is mirrored in the engine fins. Even the custom-perforated nuts on the triple tree find their reflection in the rear shock, reinforcing a sense of unity throughout the build.
ARE YOU THINKING ABOUT NEW CUSTOM BIKE?
If you like our motorcycles and have the intention of riding a similar one, do not hesitate to contact us!
info@earthmotorcycles.com
SPECIFICATION
Weight - 173kg without fuel
Seat height - 82cm
Frame and swingarm:
- new custom made reg. plate holder with integrated CE rear lights
- front fuel tank bracket risen about 4cm to level up the motorcycle
- shaved from all the unused brackets
- powder-coated frame
- new aluminum Cognito Moto footpegs
- modified Walzwerk subseat frame
- Walzwerk windshield
Forks and shock:
- internally and externally shorten forks by 7cm
- fork completely rebuilt
- professionally powder-coated
- new high end YSS MG366-410TRWL rear shock with Earth Moto custom bolts
Wheels and steering:
- Earth Moto top and bottom triple tree clamps and 1 inch clip-on handlebars
- new steering bearings
- Earth Moto 3D printed fender
- new Avon Raodrider II tires
- powdercoated wheels
Tank and seat:
- fuel tank opened, cleaned and coated from inside
- invisible welds, no more weld lips around the tank
- electromagnetic automatic fuel valve (no more petcocks)
- professionally painted using a 2k technology
- modified Walzwerk seat (more comfortable foam and real leather cover)
Engine, gearbox, and transmission:
- Earth Moto 3D nylon printed top engine cover
- all wiring and fuel hoses between engine and the tank go through 3 stainless steel pipes
- engine cleaned from the inside out
- Micro digital ignition Boyer wit automatic governor (no more classic mechanical points)
- new gaskets, grommets, seals etc…
- engine, gearbox, and transmission box sandblasted
- Cerakote coating
- checked for excessive wear
- new main crankshaft bearings
- Walzwerk CE exhausts and pipes
Fuel and air system:
- vapor blasted and ultrasonic cleaned carburetors
- black ceramic coating
- stainless steel choke set
- new seals and gaskets everywhere - new air pod filters
- K&N air filters
- modified internal throttle
Brakes:
- renewed and Cerakote coated calipers with new brake pads
- new Venhill hoses, banjo bolts, and bleeders
- new brake discs
- ISR levers with hydraulic clutch
Electric:
- new internal engine wiring harness, contacts cleaned
- new outside wiring harness
- Motogadget M-unit Blue with alarm and keyless ignition
- Aliant LiFePo4 14Ah battery
- new Lifepo4 friendly regulator
- Motogadget Motoscope Chronoclassic II speedometer with breakout box
- Motogadget Mo-blaze disc indicators, CE certified
- new spark high voltage cables and spark plugs
- KOSO Thunderbolt LED front light
- Motogadget Mo-rear 3 in 1 rear lights
Fluids:
- new fork oil, engine oil, gearbox oil, transmission oil, and brake fluid
Almost all old bolts, washers, and nut was replaced with stainless steel ones. All rusted or broken parts were cleaned, repaired, or replaced with new ones.