Yamaha Byson FI - 2020 Specifications and Reviews

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General information

CategoryNaked bike
ModelYamaha Byson FI
Year2020

Engine and Transmission Specifications

ClutchWet, manual clutch, multiplate
Transmission type,final driveChain
Gearbox6-speed
Cooling systemAir
Lubrication systemWet
IgnitionTCI
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection
Valves per cylinder2
Compression9.5:1
Torque12.98 Nm (1.3 kgf-m or 9.6 ft.lbs) @ 6000 RPM
Power12.89 HP (9.4 kW) @ 8000 RPM
Engine typeSingle cylinder, four-stroke
Capacity:155.00 ccm (9.46 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesExpanding brake (drum brake)
Front brakesSingle disc
Rear tyre130/70-M17
Front tyre100/80-M17
Rear SuspensionSwing Arm
Front SuspensionTelescopic
Frame typeDiamond
 
 

Physical measures and capacities

Fuel capacity12.00 litres (3.17 gallons)
Wheelbase1,340 mm (52.8 inches)
Overall width780 mm (30.7 inches)
Overall length1,999 mm (78.7 inches)
Overall height1,045 mm (41.1 inches)
Seat height790 mm (31.1 inches) If adjustable, lowest setting.
Power/weight ratio0.0969 HP/kg
Dry weight133.0 kg (293.2 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
ElectricalGT24V YTZ4V battery.
StarterElectric & kick
Color optionsGrey, gray/red

Performance Profile & Rider Fit

12.9 hp
Peak Power

Best For

Track15%
City85%
Cornering55%
Daily Riding80%
Touring28%
Passenger35%

Rider Profile

Best ForThis is an ideal machine for beginners and new riders building confidence in traffic and low-speed maneuvers.
PurposeIt's built primarily as a lightweight, affordable commuter naked bike for city streets rather than performance riding.
Rider FitIts low seat height and light weight make it easy for shorter or less physically strong riders to handle confidently.
CharacterThe Byson FI has a simple, no-frills, muscular-looking naked bike character with modest single-cylinder performance.
Not Ideal ForThis is not the bike for riders seeking highway touring comfort, high top speed, or serious off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 790mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2020 Yamaha Byson FI, with a moderate knee angle of around 115 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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