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

🔥High-performance cylinder head

🚀Up to 40mph speed potential

⚙️49cc 2-stroke powerhouse

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฿28034

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Unleash Mini Power, Maximize Thrills!

RACE READY 49 CC ENGINE - Compact yet mighty 2-stroke motor built for speed and agility.
VERSATILE COMPATIBILITY - Perfect fit for mini dirt bikes, ATVs, scooters—your all-terrain game changer.
COMPLETE PLUG PLAY KIT - Includes air filter, powder-coated pull start, and 14mm carburetor for instant upgrade.
FAST USA SHIPPING SUPPORT - Ships from CA/NJ warehouses with 3-5 day delivery and 24-hour customer care.
PRECISION BALANCED COMPONENTS - Balanced crank and flywheel for smooth, reliable performance every ride.

This 49cc 2-stroke air-cooled engine delivers up to 40mph on mini dirt bikes, ATVs, and scooters. Featuring a high-performance cylinder head, balanced crankshaft, and a complete kit with air filter and pull start, it offers a plug-and-play upgrade shipped fast from US warehouses with responsive customer support.

Specifications

ASIN	B07WXHZKLF
Brand	HASANEN
Brand Name	HASANEN
Compatible with Vehicle Type	Dirt Bike
Customer Reviews	3.8 out of 5 stars 191 Reviews
Exterior Finish	Aluminum
Fuel Type	Gasoline
Fuel type	Gasoline
Manufacturer	Gdrasuya
Model Number	YCZYQ-1758
Recommended Uses For Product	Motorcycle
Recommended uses for product	Motorcycle
UPC	760385686083
Unit Count	1 Count
Vehicle service type	Dirt Bike

Reviews

C**E

Great engine for a pocket dirt bike!

14.03.2022

S**N

Very weak, no better than stock!

21.05.2025

R**!

Worth the money !

22.04.2023

D**O

Not bad

27.03.2023

A**R

Works

24.10.2025

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