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 2-Stroke Engine&Transfer Motor Gear Box Air Filter Mini Pocket Dirt Bike ATV/Scooter Pull Start USA USA Stock

Product ID: 456542269

Details

Brand
HASANEN
Vehicle service type
Dirt Bike
Fuel type
Gasoline
Recommended uses for product
Motorcycle
Manufacturer
Gdrasuya

🔥Air-cooled racing design for max speed

🚀Balanced crank & uprated CVT for smooth power

⚙️49cc high-performance 2-stroke engine

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₨142157

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Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Unleash Mini Power, Max Thrills!

VERSATILE COMPATIBILITY - Perfect fit for 49cc pocket bikes, mini dirt bikes, ATVs, and scooters—upgrade your ride effortlessly.
COMPLETE PLUG PLAY KIT - Includes high-performance cylinder head, 14mm carburetor, air filter, and powder-coated pull start for instant upgrades.
RACE READY 49 CC POWERHOUSE - Hit up to 40mph with a compact, air-cooled 2-stroke engine built for thrill-seekers.
FAST USA SHIPPING SUPPORT - Ships from CA/NJ warehouses with 3-5 day delivery and responsive 24-hour customer service—never miss a beat.
PRECISION ENGINEERED FOR PEAK PERFORMANCE - Balanced crankshaft and flywheel plus ported piston windows deliver smooth, reliable power every ride.

This 49cc 2-stroke air-cooled engine is a complete high-performance motor kit designed for mini dirt bikes, ATVs, scooters, and pocket bikes. Featuring a balanced crank, uprated CVT transmission, and a 14mm carburetor, it delivers up to 40mph depending on terrain and rider weight. Shipped quickly from USA warehouses with dedicated customer support, it’s the ultimate upgrade for riders craving speed and reliability.

Specifications

ASIN	B07WXHZKLF
Brand	HASANEN
Brand Name	HASANEN
Compatible with Vehicle Type	Dirt Bike
Customer Reviews	3.9 out of 5 stars 194 Reviews
Exterior Finish	Aluminum
Fuel Type	Gasoline
Fuel type	Gasoline
Manufacturer	Gdrasuya
Manufacturer Part Number	1
Model Number	YCZYQ-1758
Recommended Uses For Product	Motorcycle
Recommended uses for product	Motorcycle
UPC	760385686083
Unit Count	1 Count
Unit count	1 Count
Vehicle service type	Dirt Bike

Reviews

M**D

Motor was red

15.06.2023

A**M

Not worth the money

17.10.2023

R**!

Worth the money !

22.04.2023

C**E

Great engine for a pocket dirt bike!

14.03.2022

D**O

Not bad

27.03.2023

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