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Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
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Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
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black leaf Ships in product packaging

This item has been tested to certify it can ship safely in its original box or bag to avoid unnecessary packaging. Since 2015, we have reduced the weight of outbound packaging per shipment by 41% on average, that’s over 2 million tons of packaging material.

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Heavy Duty Transmission Gear Reduction Box Clutch Twin-chain for 47cc 49cc 2-stroke Pocket Mini Bike T8F 11T 13T 14T 17T 20T Teeth

4.3 4.3 out of 5 stars 84 ratings
$43.49
FREE Returns
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Purchase options and add-ons

  • 【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. Mounting hole distance(adjacent): 2.97"/75.5mm, mounting hole distance(across): 4.13"/105mm. This is 91mm, not 116mm, 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】Heavy duty reduction box twin-chain design for bigger torque transmission than standard reduction box with single chains. 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. Detailed installation steps are shown in the video
› See more product details

Additional Details

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Product Description

Heavy Duty Gear Reduction Box and Racking Clutch Set for 43/47/49cc Pocket Mini Bike / Scooter / ATV. This gear box with twin-chain design for bigger torque transmission than standard reduction box with single chains.

Please confirm size of your original part. This is 91mm, not 116mm. We marked the size in the last picture.

The reduction box comes with 11,13,14,17,20 teeth total 5 pcs of sprockets.The sprocket is compatible for T8F chains.The transmission kit should fit most 47cc/49cc 2-stroke pocket Bikes.

Reduction Ratio: 3 to 1 chain reducer
Condition: Brand New
Material: Made of aluminum alloy
Color: Black

Package Includes:
Gear Reduction Box x 1
T8F 11T Sprocket x 1
T8F 13T Sprocket x 1
T8F 14T Sprocket x 1
T8F 17T Sprocket x 1
T8F 20T Sprocket x 1
Mounting Bolts Kit x 1

About Parts Quality and After-sale Services:
Please contact with us if there's any quality or other problem.

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Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Heavy Duty Transmission Gear Reduction Box Clutch Twin-chain for 47cc 49cc 2-stroke Pocket Mini Bike T8F 11T 13T 14T 17T 20T Teeth

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Customer reviews

4.3 out of 5 stars
4.3 out of 5
84 global ratings

Top reviews from the United States

James D Provo
5.0 out of 5 stars Quality
Reviewed in the United States on October 17, 2021
Verified Purchase
I have a amazon Syx I keep rebuilding and this fit perfectly. It's a nice speedbox, came lubricated and works well. It's also a better bargain than some other speed boxes. No complaints no problems = 5 Stars
2 people found this helpful
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Chad Haverfield
5.0 out of 5 stars Good Product!
Reviewed in the United States on December 13, 2020
Verified Purchase
Works awesome!
Well made product!
I would order again!
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Simon
5.0 out of 5 stars Does it work, the answer is yes
Reviewed in the United States on May 29, 2020
Verified Purchase
Yes definitely buy it I love it
One person found this helpful
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Robert B.
4.0 out of 5 stars Works great
Reviewed in the United States on May 2, 2022
Verified Purchase
This transmission works great. The only snag was when I ordered it my assumption was it says replacement for 49cc motor so I thought the sprocket's that were sent with it were for a 415 chain and I had to order a sprocket that fit this transmission and my chain. It's working great . I guess I should have made sure what type of chain went with this transmission. Good product for the money
One person found this helpful
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JaydaFoooah
3.0 out of 5 stars Not for T8F
Reviewed in the United States on June 17, 2021
Verified Purchase
This transmission didn't fit my pocket bike, BUT, gears and everything else does! It's missing a mounting hole right next to the bottom right transmission hole! DOES NOT FIT A "GPR SR" POCKET BIKE!!
One person found this helpful
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daniel o.
1.0 out of 5 stars wouldn’t recommend
Reviewed in the United States on July 16, 2020
Verified Purchase
I bought this for a pit bike that I made and it came broken. The clutch bro was already broken from the transmission shaft. I contacted the seller they never replied back I contacted the seller they never replied back.
One person found this helpful
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EMAAR
4.0 out of 5 stars I think it will always work well
Reviewed in the United States on August 5, 2021
Verified Purchase
This is exactly what I wanted. The quality is good, I have been working for 1 month and there was no defect. I think it will always work well
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