Engineered by Johammer for the prototype - concept model motorcycle segment, the 2020 Johammer J1 features a purpose-built air-cooled electric configuration. In factory specification, peak output is rated at 21.5 HP (15.7 kW).
On the scales, the J1 measures 178 kg (392 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.28 kg per horsepower). Rider ergonomics and chassis geometry center around a 650 mm (25.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,455 mm (57.3 in) wheelbase engineered for balanced agility and highway composure.
Power-to-Weight
0.12 HP/kg (8.28 kg/HP)
Standover Height
650 mm (25.6 in)
Engine
Engine TypeElectric
Engine DetailsDC-excited synchronous motor with single-stage transmission, both submerged in sealed oil bath, no maintenance required
Power21.5 HP (15.7 kW))
CoolingAir
Performance
Top Speed120.0 km/h (74.6 mph)
Chassis
Frame TypeCentral aluminium frame, bolted
Front SuspensionTwin-arm box-section front fork with progressive suspension
Rear SuspensionSingle-arm cast aluminium rear fork with progressive suspension control.
Wheelbase1455 mm (57.3 inches)
Wheels & Brakes
Front BrakesSingle disc. Regenerative braking
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. Regenerative braking
Rear Brake Ø300 mm (11.8 inches)
Dimensions & Weight
Dry Weight178.0 kg (392.4 pounds)
Power/Weight0.1206 HP/kg
Seat Height650 mm (25.6 inches) If adjustable, lowest setting.
Overall Height1200 mm (47.2 inches)
Overall Length2200 mm (86.6 inches)
Overall Width814 mm (32.0 inches)
Other
StarterElectric
Color OptionsSilver, white, blue, green, yellow
Notes
Li-ion battery, 72V. Range 200 km. 3.5 h charging.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
