2021 Ultra California Kid Bobber Technical Analysis & Specification Breakdown
At the heart of the 2021 Ultra California Kid Bobber custom - cruiser motorcycle, Ultra pairs a 1851.9 cc (113 cu in) air-cooled v2, four-stroke architecture with road-focused gearing.
Rider ergonomics and chassis geometry center around a 635 mm (25 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.
Within MotoLibrary's Ultra archive, this model family spans 4 indexed model years from 2014 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
635 mm (25 in)
Engine
Displacement1851.9 ccm (113.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsUltra natural finish engine
Fuel SystemCarburettor. S and S Super G Carburetor
IgnitionSpyke Ignition System
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
DrivelineLeft Side Drive Ultra Polished Transmission
Performance
Exhaust2-into-2 exhaust
Chassis
Frame TypePowder Coated Black Frame
Rake35.0°
Front SuspensionTelescopic fork
Wheels & Brakes
Front Tyre120-21
Rear Tyre180-18
Front BrakesSingle disc. Chromed Billet Brake Calipers
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
