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MMG

MMG High-Performance Racing Variator Kit for Chinese Scooter Moped ATV 4-Stroke GY6 50cc 80cc 100cc 139QMB 139QMA Engine Front Clutch

  • Based on 134 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Sep 30
Order within 17 hours and 28 minutes
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Features

  • Fits 50cc/100cc 4 Stroke GY6/QMB139 engines
  • (6) 5 grams roller weights
  • (3) 7 grams roller weights
  • Rollers can be combined to achieve 5,6 and 7 grams setups.
  • Improves acceleration and top end speed compared to stock/restricted cvt.

Size: 50cc


Exterior Finish: Silver


Brand: MMG


Material: Metal


Pitch Circle Diameter: 9 centimeters


Rim Size: 10 centimeters


Item Weight: 4.8 ounces


Vehicle Service Type: ATV, Moped


Load Index: 41


UPC:


Size: 50cc


Pitch Circle Diameter: 9 centimeters


Rim Size: 10 centimeters


Item Weight: 4.8 ounces


Compatible with Vehicle Type: ATV, Moped


Load Index: 41


Seasons: All Season


Automotive Fit Type: Vehicle Specific Fit


Material Type: Metal


Brand Name: MMG


Manufacturer Part Number: MGHPU9695


UPC: 634543474341


Number of Packs: 1


Unit Count: 1 Count


Manufacturer: MMG


Exterior Finish: Silver


Color: Silver


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good replacement for daily rider
I am very happy with this kit. The variator is light weight, and may wear quickly, but it shifts very smoothly compared to oem replacement. The rollers seem to be decent quality as well, though there is some variation in weight by +/- 0.1g.
Reviewed in the United States on November 30, 2017 by Mr. K
    • Important performance upgrade for any gy6 engine!
Wonderful mod for any gy6 engine. My 80cc big bore moped now has tons of power and doesn’t bog down at certain speeds. This variator keeps the proper rpm all the way throughout the shift range. Takeoff is par none and low to mid speed acceleration is great. I can reach top speed and there’s still room for more shifting because I don’t feel the rpm increase unless I’m goin go downhill, ... show more
Reviewed in the United States on May 10, 2021 by Christian
    • meh
Its alright for the price kinda like the stock one I don't notice a difference
Reviewed in the United States on August 31, 2024 by Isaac
    • Well made
I have yet to install but iv purchased a few before thus one and I will say compared to others this one feels and looks well made. I will say you most likely will need better quality rollers but the variator itself is good
Reviewed in the United States on April 25, 2022 by Joshua Kenney
    • Roller weights aren't as described. And painted surface issue
Review Image by scott a.
Review Image by scott a.
Roller weights are way off . I got 3x5g 3x 6.8g 3x 8.8g Also the paint is coming off and messing the rollers up.
Reviewed in the United States on May 16, 2025 by scott a.
    • Don't waste your money
Just waste of money and they do work but they don't really give you the the speed you asking for my old one ten times better than that one that's what I have in my school right now my old one
Reviewed in the United States on November 15, 2020 by Muaid
    • My Scooty Puff Jr. SCOOTS!!!
This thing gave me a good 10 more mph. If you have a scooter and a wrench BUY THIS NOW!!!
Reviewed in the United States on January 9, 2020 by Bigham Dickens
    • A must have upgrade for new scooters!
Installed (minus the clutch springs) in my QMB 139 scooter and immediately saw an improvement. This kit, an iridium spark plug, and performance coil has me taking hills at least 8mph faster than stock with my Bintelli Sprint. Once my new 38mm socket is delivered, I will add the clutch springs and see if that adds more to my scoots performance! Great upgrade! ... show more
Reviewed in the United States on November 14, 2017 by Gr1221

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