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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2 Stroke Motor Gearbox 49CC Air Filter Mini Pocket Dirt Bike ATV/Scooter Pull Start USA STOCK

Product ID: 456542269

Details

Brand
HASANEN
Fuel type
Gasoline
Recommended uses for product
Motorcycle
Unit count
1 Count
Vehicle service type
Dirt Bike

🔥Air-cooled racing power

🚀Up to 40mph speed potential

⚙️49cc high-performance engine

€ 316.27

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your ride, dominate the dirt!

VERSATILE COMPATIBILITY - Perfect fit for 49cc pocket bikes, mini dirt bikes, ATVs, and scooters—your all-in-one power solution.
COMPLETE PLUG PLAY KIT - Comes with cylinder head, 14mm carburetor, air filter, and powder-coated pull start for instant upgrade.
RACE READY 49 CC POWERHOUSE - Unleash thrilling speeds up to 40mph with a finely tuned 2-stroke engine.
FAST USA SHIPPING SUPPORT - Ships from CA/NJ warehouses with 3-5 day delivery and responsive 24-hour customer care.
PRECISION ENGINEERED COMPONENTS - Includes balanced crank, ported piston windows, and uprated CVT for peak performance.

This 49cc 2-stroke air-cooled engine kit delivers up to 40mph speed, featuring a balanced crank, ported piston windows, and an uprated CVT transmission. Designed for mini dirt bikes, ATVs, scooters, and pocket bikes, it includes a high-performance cylinder head, 14mm carburetor, air filter, and durable powder-coated pull start. Shipped quickly from USA warehouses with dedicated customer support.

Specifications

Asin	B07WXHZKLF
Best Sellers Rank	#96,293 in Automotive (See Top 100 in Automotive) #1,173 in Car Engine Air Filters
Brand Name	HASANEN
Compatible With Vehicle Type	Dirt Bike
Customer Reviews	3.9 3.9 out of 5 stars (198) 3.9 out of 5 stars
Exterior Finish	Aluminum
Fuel Type	Gasoline
Manufacturer	Gdrasuya
Manufacturer Part Number	1
Model Number	YCZYQ-1758
Recommended Uses For Product	Motorcycle
Unit Count	1 Count
Upc	760385686083

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