Enfield Thunderbird X 350 - Specifications & Review

Thunderbird X 350

Article Complete Info

Articleid790019
CategoryClassic
MakeEnfield
ModelThunderbird X 350
Year2018

Chassis, Suspension, Brakes & Wheels

FrametypeSingle downtube, using engine as stressed member
FrontbrakesSingle disc. Two piston caliper, ventilated disc.
Frontbrakesdiameter280 mm (11.0 inches)
FrontsuspensionTelescopic With Hydraulic Damping, 41 mm.
Fronttyre90/90-19
Frontwheeltravel130 mm (5.1 inches)
RearbrakesSingle disc. Single piston caliper, ventilated disc.
Rearbrakesdiameter240 mm (9.4 inches)
RearsuspensionSwing arm With Gas Shock Absorbers.
Reartyre120/80-18
Rearwheeltravel80 mm (3.1 inches)
WheelsCast, 9-spoke

Engine & Transmission

Borexstroke70.0 x 90.0 mm (2.8 x 3.5 inches)
ClutchWet mulitiplate
Compression7.3:1
CoolingsystemAir
Displacement346.00 ccm (21.11 cubic inches)
EnginedetailsSingle cylinder, four-stroke
EnginetypeTwin spark
FuelsystemCarburettor. CV type
Gearbox5-speed
IgnitionTCI
LubricationsystemWet sump
Power19.80 HP (14.5 kW)) @ 5600 RPM
Topspeed120.0 km/h (74.6 mph)
Torque28.00 Nm (2.9 kgf-m or 20.7 ft.lbs) @ 4000 RPM
TransmissiontypefinaldriveChain

Other Specifications

ColoroptionsBlue, Red, White, Orange
CommentsBrand full name is Royal Enfield. The bikes are made in India.
Electrical12V
Light55/55 W Halogen headlamp
StarterElectric & kick

Physical Measures & Capacities

Fuelcapacity20.00 litres (5.28 gallons)
Groundclearance135 mm (5.3 inches)
Overallheight1,140 mm (44.9 inches)
Overalllength2,040 mm (80.3 inches)
Overallwidth830 mm (32.7 inches)
Seatheight775 mm (30.5 inches) If adjustable, lowest setting.
Weightincloilgasetc195.0 kg (429.9 pounds)

About Enfield

Country of Origin: United Kingdom (heritage), India (modern Royal Enfield)
Founder: Enfield Cycle Company; later stewardship by Eicher Motors (India)
Best Known For: Classic singles and twins; Bullet/Classic lineage and modern 650 twins

Company History

The Enfield story spans two nations and more than a century. In England, the Enfield Cycle Company built sturdy singles and twins that served commuters, police, and the military, with the Bullet becoming a postwar icon for its thump and simplicity. When Britain’s motorcycle industry contracted, licensed production in India kept the Bullet alive at Royal Enfield’s Madras (now Chennai) works. There, the motorcycle transcended transport to become cultural shorthand—film star, touring mule, and village legend. Under Eicher Motors’ stewardship in the 2000s–2010s, Royal Enfield modernized while honoring silhouette and sound. New UCE engines, then refined J-series singles, improved brakes and electrics, and finally the globally acclaimed 650 twin platform proved that affordability and charm could travel. The brand expanded into accessible adventure (Himalayan), neo-retro roadsters (Interceptor/Continental GT 650), and a more robust service culture that turned nostalgia into a dependable ownership proposition. Historically, Enfield’s significance is unique: it preserved mid-century motorcycling’s cadence—long-stroke beats, unhurried torque—into the present, then exported it back to the world with modern reliability. For millions of riders, the first long road out of town arrived on a Bullet; for a new generation, it arrives on a 650 twin that still feels human-scaled. Across continents, Enfield stands for the idea that motorcycles can be simple, soulful, and attainable—and that lineage, if cared for, can carry a brand farther than any spec sheet.

Other Years

Bike n Rider logo
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.