SKU: 42075333429
chain for gears

chain for gears Heavy Hitter 520 Primary Chain Drive Conversion

Sale price$25.95 Regular price$28.83
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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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Description

chain for gears Heavy Hitter 520 Primary Chain Drive ConversionImportant Notice: When installing, make sure your chain tension is not tight! Any chain drive that you install should have loose chain tension! For OEM Motor ONLY! Most aftermarket motors have a +4mm offset change. Big Performance for big power builds and long term reliability. The heavy hitter Ultra Bee primary chain conversion is designed with perfection in mind. Most primary chain conversions are flat cut 420 sprockets, which will work but require

Important Notice: When installing, make sure your chain tension is not tight! Any chain drive that you install should have loose chain tension! For OEM Motor ONLY! Most aftermarket motors have a +4mm offset change.

Big Performance for big power builds and long-term reliability. The heavy hitter Ultra Bee primary chain conversion is designed with perfection in mind.

Most primary chain conversions are flat-cut 420 sprockets, which will work but require additional maintenance and a shorter chain life. We have designed our chain conversion around a 520 chain because let's face it even on LightBee's broken chains were happening and with more weight and more power an upgrade is needed.

In addition to the chain size being upgraded, we have also designed an exclusive dished rear sprocket. The primary chain conversions with flat sprockets left very little room for the frame adjuster and rear lower motor mount frame tab. This will ultimately end up with damage and scarring to your frame if your tension goes slightly out of spec, so why not use the room provided and space it internally. 

Features

  • Exclusive dished sprocket design for proper clearance
  • 520 O-ring Chain included for long-term reliability 
  • 7075 aluminum design for increased longevity and reduced corrosion
  • No shims or spacers are required, a simple install (OEM Motor Only)
  • Master link chain for easy chain swaps when it is time for maintenance

Fitment

Sur Ron Ultra Bee (OEM Motor Only)

Important Notice: When installing, make sure your chain tension is not tight! Any chain drive that you install should have loose chain tension!

This is the known and tested compatibility for this product. Factory variations, dealer options, and aftermarket modifications could affect compatibility in specific cases. Please verify compatibility to the best of your ability before purchasing.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42075333429

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TwinkleToes
Natrona Heights, US
★★★★★ 5
Loved the quinces book!
Format: Kindle
Yay a new book! When i saw this I was just like"Omg no way, SHUT UP A NEW BOOK!?! Anyway love ur books Kat!
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Reviewed in the United States on August 9, 2025
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Alfredo Paucar
Louisville, US
★★★★★ 5
Muy bueno para leer
Format: Paperback
LE ENCANTA A LOS NINOS Y RECOMENDADO POR LAS MAESTRAS
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Reviewed in the United States on October 3, 2025
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BooksOverTV
Louisville, US
★★★★★ 4
Great Read
Format: Kindle
A story for all ages. Loved the first and this one didn’t disappoint. It’s an entertaining fast paced read. Beautiful imagery
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Reviewed in the United States on October 30, 2025
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Rachel
Bozeman, US
★★★★★ 5
5 stars
Format: Kindle
This is a companion novel to “Miss Quinces” So I had high hopes for enjoying this graphic novel by Kat Fajardo. Those hopes were thankfully met as I really enjoyed my time reading. So much so I binged this book in one day, which is hard to do with an infant. It’s making me want to reread “Miss Quinces” so I can stay in Suyapa’s world a little longer.
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Reviewed in the United States on January 18, 2026
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Stephanie Turville
Chelsea, US
★★★★★ 1
More pronouns than I care for in a children’s book.
Format: Paperback
Not impressed. Gender nonsense marketed to children. Chapter one seeemed normal, chapter two is where the nonsense starts.
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Reviewed in the United States on November 3, 2025

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