Boom BD250cc Motorcycle Sport

Boom BD250 EFI 223cc Sport Motorcycle

Liquid-Cooled • EFI Fuel Injection • 6-Speed Manual • Full-Size Street Sport Platform

The Boom BD250 (223cc EFI) represents a major step up inside your L7 Motorsports rider progression ladder, moving riders from mini-motorcycle platforms like the VADER 125 into a true full-size street sport motorcycle class with highway-capable performance, liquid cooling, and electronic fuel injection.

This motorcycle sits squarely in the entry full-size sport-bike category, making it one of the strongest transition models for riders graduating from:

• 150cc scooters
• 125cc mini motorcycles
• beginner manual platforms

into serious street riding capability.

ENGINE PLATFORM

Engine Type: Single Cylinder 4-Stroke

Cooling System: Liquid-Cooled

Fuel System: Electronic Fuel Injection (EFI)

Displacement: 223cc

Maximum Power: 12 kW @ 7000 RPM

Maximum Torque: 17.5 Nm @ 5500 RPM

Fuel Consumption: Approx. 69 MPG

Fuel Tank Capacity: 17 Liters (≈ 4.5 Gallons)

Liquid cooling + EFI dramatically improves:

✔ cold-start reliability
✔ throttle response
✔ fuel efficiency
✔ long-distance riding stability

TRANSMISSION & DRIVE SYSTEM

Transmission Type: 6-Speed Manual Sport Clutch

Gear Pattern: 6 + Neutral

Drive System: Chain Drive

Provides true highway-capable gearing and rider-controlled power delivery.

PERFORMANCE CAPABILITY

Maximum Speed: Up to 90 MPH*

Designed for:

City commuting
Highway connectors
Weekend sport riding
Long-distance urban mobility

(*Speed varies by rider weight and terrain conditions.)

BRAKING SYSTEM

Front Brake: Hydraulic Disc

Rear Brake: Hydraulic Disc

Dual-disc braking configuration supports confident high-speed stopping performance.

WHEEL & TIRE PACKAGE

Front Tire: 110/60-17

Rear Tire: 140/60-17

Full-size 17-inch sport wheels provide:

✔ improved highway stability
✔ stronger cornering performance
✔ true motorcycle geometry feel

This is a major upgrade from 12-inch mini-motorcycle platforms like the VADER.

FRAME & CHASSIS STRUCTURE

Frame: Reinforced Steel Sport Frame

Net Weight: 133 kg (≈ 293 lbs)

Gross Weight: 165 kg

Balanced weight distribution supports confident handling across city and highway riding environments.

DIMENSIONS & RIDER ERGONOMICS

Length: 80 inches

Width: 24 inches

Height: 45 inches

Seat Height: 31 inches

Wheelbase: 1320 mm

Ground Clearance: 160 mm

Handlebars to Ground: 36 inches

Full-size ergonomics ideal for riders transitioning from mini platforms into sport motorcycles.

ELECTRICAL SYSTEM

Ignition System: CDI

Lighting Package Includes:

Headlight
Turn signals
Brake light
Mirrors
Instrument cluster display

EFI system improves ignition consistency and throttle response compared with carbureted platforms.

QUICK SPEC SUMMARY 

Engine: 223cc 4-Stroke Liquid-Cooled EFI

Transmission: 6-Speed Manual

Drive: Chain

Fuel Tank: 17 Liters

Front Brake: Hydraulic Disc

Rear Brake: Hydraulic Disc

Front Tire: 110/60-17

Rear Tire: 140/60-17

Seat Height: 31 inches

Top Speed: Up to 90 MPH*

Fuel Economy: Approx. 69 MPG

DELIVERY & RIDER INFORMATION BLOCK 

👉🏽 License Requirement:
Motorcycle endorsement maybe required for operation. Check your local DMV requirements.

👉🏽 Assembly Required:
Ships factory-crated and requires setup including:

Handlebars
Mirrors
Battery connection
Fluid inspection
Safety inspection prior to riding

👉🏽 Delivery Method:
Ships via A freight carrier curbside delivery depending on access conditions.

👉🏽 Inspection Upon Delivery:
Inspect packaging condition before signing delivery receipt and note visible damage with carrier if present.

👉🏽 Street-Legal Notice:
Designed for street-legal registration where permitted under local DMV compliance requirements.