100cc 2‑Stroke Gas Motorized Bicycle Engine Conversion Kit for 26–28"

OVERVIEW

Upgrade a standard bicycle into a motorized bike with this complete 100cc 2-stroke gasoline engine conversion kit. Designed for most 26" and 28" bicycles, it includes all major components required for installation, providing a powerful and fuel-efficient riding solution.

KEY FEATURES

• 100cc 2-stroke single-cylinder, air-cooled engine design
• Rated power: 2.5 kW @ 5000 r/min (approx. 3 HP)
• Maximum power: 3.5 kW @ 5000 r/min (approx. 6–6.5 HP)
• Typical top speed: 50–60 km/h (dependent on bike, rider and conditions)
• Low fuel consumption: approx. 2.5–3.5 L/100 km
• Heavy-duty metal engine body for increased durability
• Includes teardrop fuel tank, carburetor, muffler, chain and controls
• Suitable for most 26" and 28" bicycles such as mountain, road, cruiser and chopper styles

TECHNICAL SPECIFICATIONS

• Engine type: 100cc 2-stroke, single cylinder, air-cooled
• Rated power: 2.5 kW @ 5000 r/min
• Max. power rotary speed: 3.5 kW @ 5000 r/min
• Maximum speed: approx. 55–60 km/h (bike- and condition-dependent)
• Ignition: capacitor discharge electronic ignition (CDI)
• Transmission ratio: 16.4:1
• Compression ratio: 7:1
• Spark plug type: 4144
• Lubrication: 2-stroke engine oil mixed with fuel
• Fuel: unleaded 91 petrol mixed with 2-stroke oil
• Fuel tank capacity: 2 L teardrop-style tank
• Fuel consumption: approx. 2.5–3.5 L/100 km
• Clutch: manual dry clutch
• Cooling mode: natural air cooling
• Conrod: needle rollers on both ends
• Internal bearing: RS202
• Chain: standard 415
• Recommended bike load capacity: up to approx. 180 kg (396 lb)

PERFORMANCE & BENEFITS

• Converts a conventional bicycle into a gasoline-powered motorized bike
• Higher cruising speed compared with regular pedaling alone
• Energy-efficient design for economical commuting and recreational use
• Manual clutch lever for smooth engagement and control
• Kill switch on throttle for quick engine shut-off

PACKAGE CONTENTS

• 1 × 100cc 2-stroke engine
• 1 × spark plug
• 1 × chain cover
• 1 × chrome muffler
• 1 × drive chain idler
• 1 × push clutch lever
• 1 × standard 415 bike chain
• 1 × CDI ignition assembly
• 1 × set of main bearings
• 1 × black teardrop gas tank (2 L)
• 1 × carburetor
• 1 × magneto with handlebar kill switch
• 1 × sprocket
• 1 × twist throttle and cable with matching grip
• 1 × user manual

INSTALLATION NOTES

• Compatible with most 26" and 28" bicycle frames; not suitable for frames with front tube width over 50 mm.
• Engine break-in: use 2-stroke oil at approx. 8 oz per US gallon of fuel during the initial running period.
• Align chainwheel and sprocket in a straight line for smooth operation.
• After installing carburetor and throttle cable, verify that the slide operates smoothly when twisting the throttle.
• When installing clutch cable, check that the rear wheel spins freely with clutch pulled in and stops when released.
• Adjust chain tension so that vertical chain deflection is approximately 0.5–1 cm under light pressure.
• Ensure spark plug, muffler and carburetor fasteners are securely tightened.
• Confirm all electrical connections are correctly and securely made before use.

SAFETY & LEGAL INFORMATION

• Always wear an appropriate, approved helmet and protective gear.
• Ensure adequate lighting and reflectors if operating in low-visibility conditions, where permitted.
• Local regulations may restrict or prohibit use of motorized bicycles on public roads or bike paths. Check applicable laws and use on private property or off-road where required.
• Regularly inspect mounting hardware, chain tension and brakes before riding.

IMPORTANT NOTES

• Manual measurements may vary slightly; allow for minor dimensional tolerances.
• Actual product color may differ slightly due to lighting and display variations.
• Professional or experienced installation is recommended for best performance and safety.