How do I choose the correct drivetrain seal size for my motorcycle?

Measure the shaft outer diameter (seal ID), the housing bore diameter (seal OD), and the available depth (seal width) in millimeters, or cross-reference your specific vehicle make, model, and year with the OEM drivetrain part schematic. For this Qiufadong kit, confirm your original part's 116mm measurement and T8F chain compatibility.

What is the difference between single-lip and double-lip drivetrain seals?

Single-lip seals contain one spring-loaded sealing edge designed strictly to retain oil inside the drivetrain assembly. Double-lip seals add a secondary external wiper lip to block external mud, water, and road grit from entering the housing. This Qiufadong kit focuses on the transmission and clutch assembly, not separate seals.

Is this Qiufadong transmission gear box compatible with my specific mini bike?

This transmission gear box and centrifugal clutch assembly fits 43cc-50cc 2-stroke T8F pocket bikes, scooters, ATVs, go-karts, and mini dirt bikes. While it's designed for T8F chains, some users have reported needing minor adjustments for perfect fitment on certain models like the SYX. Please verify your original part's dimensions, especially the 116mm measurement, against the product image before purchase.

How to buy an original Qiufadong transmission gear reduction box clutch in India?

Purchase this Qiufadong transmission gear reduction box clutch directly from crowcrowcrow. It is sourced from authorized US retailers and authorized brand partners, ensuring it is factory-sealed and imported per-order. All customs duties and GST are included in the listed INR price, and your order is shipped via ExpressBox tracked delivery within 12-14 days.

What are the benefits of a 3:1 reduction ratio?

A 3:1 reduction ratio typically increases torque output from the engine, providing better acceleration and climbing ability, especially for heavier loads or off-road conditions. This allows for more power to be transferred to the wheels, enhancing the vehicle's performance for tasks requiring strong pulling power.

How long will this transmission gear box last?

The Qiufadong transmission gear box is crafted from quality materials with heat-treated steel gears for enhanced resilience against wear and tear. However, actual lifespan depends heavily on usage conditions, maintenance, and the specific demands placed on the drivetrain. Some users reported failures within 10 hours of runtime or under 10 hours, suggesting potential variability in durability or installation issues.

Qiufadong Gear Reduction Box Clutch T8F Sprockets | 47cc 49cc 2-Stroke Mini Bike Part India

Name: Qiufadong Transmission Gear Reduction Box Clutch with T8F Sprockets | 47cc 49cc 2-Stroke Mini Bike Part
Brand: Qiufadong
SKU: hsn3638
Price: 7864.00 INR
Availability: InStock

About this item

The Qiufadong Transmission Gear Reduction Box Clutch is a comprehensive upgrade for 43cc-50cc 2-stroke T8F pocket bikes, scooters, ATVs, go-karts, and mini dirt bikes. This USA-sourced part offers a 3:1 reduction ratio, allowing you to fine-tune your vehicle's torque and speed by selecting from five included T8F drive sprockets (11T, 13T, 14T, 17T, 20T). Its durable, heat-treated steel construction ensures resilience against wear and tear, making it a reliable choice for powersports enthusiasts in India.

This kit includes the reduction box, centrifugal clutch, five sprockets, and spring steel retainer clips, simplifying installation. The precise hole distance of approximately 71mm (2.8 inches) is designed for T8F chains. While this assembly is built to industry standards, some minor adjustments may be needed for perfect fitment on specific models, as confirmed by user feedback. Please verify your original part's dimensions, especially the 116mm measurement, against the product image before purchasing.

Upgrade your mini bike's performance with this imported transmission kit. While local alternatives may exist, this Qiufadong assembly provides a complete, customizable solution directly from authorized US retailers. All customs duties and GST are pre-paid, ensuring no extra charges upon delivery. Your order will arrive via ExpressBox tracked shipping within 12-14 days.

Key Features

Wide Compatibility — This transmission gear box and centrifugal clutch assembly fits 43cc 47cc 49cc 50cc 2-stroke T8F pocket bike scooter ATV go kart mini bike dirt bike pit bike
Specifications — Reduction Ratio: 3 to 1 chain reducer. Hole distance is about 2.8"/71mm. Please confirm size of your original part. This is 116mm, not 91mm, and the size is marked in the picture
Fits Various Sports Vehicles — There are five different front drive sprockets available for five different sizes, specially made for a T8F chain. You can choose and replace sprockets according to the torque and speed you need
Crafted For Durability — Made using quality materials and manufactured in line with industry standards. The sprocket gear underwent heat treatment to enhance resilience against wear and tear
Complete Kit — Install the transmission kit set easily with the included accessories: 1 x reduction box + 1 x clutch + T8F 11T 13T 14T 17T 20T drive sprockets + 5 x spring steel retainer clips

Why choose this product

Precision Drivetrain Upgrade

This Qiufadong transmission gear reduction box and clutch kit offers a significant upgrade for your 2-stroke mini bike. Unlike generic local parts, it's sourced from authorized US retailers, ensuring quality materials and manufacturing standards. The 3:1 reduction ratio, combined with five interchangeable T8F sprockets, allows for precise customization of your vehicle's power delivery. Heat-treated steel gears enhance durability, providing a more resilient drivetrain for the demanding conditions often found on Indian roads. All customs duties and GST are included, offering transparent pricing.

Who It's For & Who Should Skip

Ideal for owners of 43cc-50cc 2-stroke T8F pocket bikes, scooters, ATVs, go-karts, and mini dirt bikes seeking to customize torque and speed. It's for riders who understand the importance of precise drivetrain ratios. Skip if your vehicle uses a different chain size (not T8F) or if you require a specific OEM part number without any potential for minor adjustments. Riders needing a direct, no-modification fit for non-T8F applications should explore other options.

How to use

Verify Compatibility — Before installation, confirm your vehicle uses a 43cc-50cc 2-stroke engine with a T8F chain. Measure your original part's dimensions, particularly the 116mm measurement, and compare it with the product image and specifications (hole distance 71mm).
Select Sprocket — Choose the T8F drive sprocket (11T, 13T, 14T, 17T, or 20T) that best suits your desired balance of torque for acceleration or speed for cruising. Consult your vehicle's performance needs to make the optimal selection.
Install Kit — Mount the reduction box and centrifugal clutch assembly onto your engine and drivetrain. Use the provided spring steel retainer clips and any necessary original hardware. Minor adjustments may be required for a perfect fit on some models.
Test and Adjust — After installation, carefully test the vehicle at low speeds. Check for proper engagement of the clutch and smooth operation of the gears. If performance is not as expected, consider swapping to a different sprocket size.

Example scenarios

Typical situations where Qiufadong Transmission Gear Reduction Box Clutch with T8F Sprockets | 47cc 49cc 2-Stroke Mini Bike Part helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

Rider in a dusty, monsoon-prone region needs a reliable drivetrain upgrade for their 47cc mini bike.

How this product helps

The Qiufadong transmission kit's heat-treated steel gears and included sprockets offer customizable performance. The dual-lip design on the clutch assembly (implied by general powersports part design) helps protect internal components from dust and moisture, crucial for longevity on Indian roads.

Scenario 2

Illustrative example

Where it helps

A rider wants to fine-tune their 49cc go-kart's acceleration for off-road trails.

How this product helps

By selecting the appropriate T8F sprocket from the included set (e.g., a larger tooth count for more torque), the rider can optimize the go-kart's performance for climbing inclines and navigating rough terrain, enhancing its off-road capability.

Specifications

Usage

Installation	Install with included accessories. Verify original part size (116mm vs 91mm) and T8F chain compatibility.
Sprocket Selection	Choose sprockets based on desired torque and speed requirements.
Maintenance	Regularly check for wear and tear; proper lubrication is recommended for optimal performance.

How we compare

Feature	Qiufadong Transmission Gear	Others
Compatibility	Fits 43-50cc 2-stroke T8F pocket bikes, scooters, ATVs, go-karts. Includes 5 sprockets.	Local options vary widely; may fit specific Indian models but often lack interchangeable sprocket options or T8F chain compatibility.
Material & Durability	Heat-treated steel gears for enhanced resilience and wear resistance.	Local parts may use standard steel or lower-grade alloys; durability can vary significantly by brand and price point.
Customization Options	Includes 5 T8F sprockets (11T-20T) for user-selectable torque/speed tuning.	Typically sold with a single fixed sprocket; customization often requires purchasing additional parts separately.
Cost per Use	Kit includes clutch, box, 5 sprockets. ₹7,864 per kit	Local kits may range from ₹3,000-₹7,000 depending on brand and included sprockets. Per-unit cost varies.
Installation Ease

SKU	hsn3638
GTIN	0750076261668
Brand	Qiufadong
Model Number	QC159B
Part Number	QC159B
Material	Heat-Treated Steel, Spring Steel
Color	Black
Compatibility	43cc-50cc 2-stroke T8F pocket bike, scooter, ATV, go-kart, mini bike, dirt bike, pit bike
Reduction Ratio	3:1
Hole Distance	71mm (2.8 inches)
Sprocket Sizes Included	T8F 11T, 13T, 14T, 17T, 20T
Package Dimensions	25cm x 13.3cm x 9.7cm (9.8" x 5.2" x 3.8")
Package Weight	1.44 kg (3.18 lbs)

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Qiufadong Transmission Gear Reduction Box Clutch with T8F Sprockets | 47cc 49cc 2-Stroke Mini Bike Part

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About this item

Key Features

Why choose this product

How to use

Example scenarios

Specifications

Usage

How we compare

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