can the moter go on a uber scoot 2 speed 50cc

I don't know what that is but is it semiautomatic or a 2 speed auto belt drive setup like gokarts with torque converters? If it has a gearbox with shifter than it would have to be separate from the engine itself most motorcycle gearboxes are built in to the engine thus they're one complete unit so you cannot mate the gearbox to another engine. If the gearbox is its own unit and separate from the engine meaning not built in to the engine than it is possible to use this engine yes. Now if the gearing in your gearbox is too tall the engine will struggle. You can help the engine struggle less by changing to smaller front sprocket or a larger rear sprocket. This should cover your question and any others you might have. If not I will provide any info I can to help further.

What is the black wire coming outa the engine near the spark plug with the connector on it for?

It's for a ground or the kill switch. Can't remember.

Does this use a #40 chain?

Can't remember I gave up on the engine and put an electric motor on my bicycle . I gave the engine to my older son and said try making a chain saw out of it . lol

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49CC/50CC Bike Engine, 1.9kw/7000rpm 2-Stroke Engine&Transfer Motor W/Gear Box Air Filter & Pull Rope Start and Electronic Ignition System Mini Motorbike Engine for Mini Pocket Dirt Bike ATV/Scooter

49CC/50CC Bike Engine, 1.9kw/7000rpm 2-Stroke Engine&Transfer Motor W/Gear Box Air Filter & Pull Rope Start and Electronic Ignition System Mini Motorbike Engine for Mini Pocket Dirt Bike ATV/Scooter

Product ID: 153846318

Details

Brand
HASANEN
Fuel Type
Gasoline
Number of Items
1
UPC
760385686083
Unit Count
1 Count

🔥2-stroke high efficiency

⚙️1.9kW max power

❄️Air cooling system

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VT38872

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Description

⚡ Unleash Mini Power, Max Thrill!

STAY COOL UNDER PRESSURE - Advanced air cooling system prevents overheating, ensuring longer rides without a hitch.
INSTANT IGNITION ZERO WAIT - Electronic ignition system guarantees quick, reliable starts every time—no more fumbling.
POWER THAT COMMANDS THE RIDE - 1.9kW/7000rpm 2-stroke engine delivers smooth, high-octane performance for your mini bike or ATV.
BUILT TO ENDURE EVERY TERRAIN - Premium aluminum construction offers superior wear and corrosion resistance for rugged adventures.
SEAMLESS CONTROL WITH UPGRADED CVT - Enhanced gearbox and stable bearing improve response speed and operational smoothness.

This 49CC/50CC 2-stroke mini bike engine packs a punch with 1.9kW power at 7000rpm, featuring an air cooling system and electronic ignition for reliable, efficient performance. Built from durable aluminum and equipped with an upgraded CVT gearbox, it supports up to 396.8 lbs and reaches speeds up to 48 km/h, making it the perfect powerhouse for mini dirt bikes, ATVs, and scooters.

Specifications

ASIN	B07WXHZKLF
Best Sellers Rank	#713,132 in Automotive ( See Top 100 in Automotive ) #373 in Powersports Engine Kits
Brand Name	HASANEN
Customer Reviews	3.8 3.8 out of 5 stars (199)
Fuel Type	Gasoline
Included Components	1* Engine
Manufacturer Part Number	1
Model Number	YCZYQ-1758
UPC	760385686083
Unit Count	1 Count

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VT38872

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

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