SKU: 27771508538

EBMX Competition Jackshaft for Ultra Bee

Sale price$123.75 Regular price$137.50
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 5 - Aug 10

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Description

EBMX Competition Jackshaft for Ultra BeeCompetition use jackshaft developed in house by EBMX and used in E Xplorer and global race events. The original Ultra Bee jackshaft was never intended for 50 plus KW, 90 foot jumps and aggressive off road riding. Once you have to ditch the belt due to increased power and required reliability, the original jackshaft starts to fail, from snapping secondary sprocket bolts on landings and completely ovaling the entire body where the bearings fall out. It

Competition use jackshaft developed in house by EBMX and used in E-Xplorer and global race events.

The original Ultra Bee jackshaft was never intended for 50 plus KW, 90 foot jumps and aggressive off road riding. Once you have to ditch the belt due to increased power and required reliability, the original jackshaft starts to fail, from snapping secondary sprocket bolts on landings and completely ovaling the entire body where the bearings fall out. It was clear to EBMX a high powered jackshaft needed to be designed. 

Solid steel replaces the aluminium body now keeping the bearings in place and adding over all strength. We have made the total diameter larger and eight hybrid bearings replace the original four roller bearings. To remove the issue of constant shearing of the 12.9 grade bolts on the secondary side we upgraded to spline and sprocket, alleviating this issue altogether. This is a true performance upgrade for the Ultra Bee and if you're building a serious bike or even doing some mild track work this is a must have for reliability.

Maintenance Notes: Bearings must be maintained periodically, EBMX would recommend removing the jackshaft and repacking with grease every 6 months, depending on use. EBMX stock all replacement parts and bearings, the jackshaft is completely serviceable and is designed to be disassembled for maintenance when required. 

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: 27771508538

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Jack
Massapequa, US
★★★★★ 5
Watch
Great
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Reviewed in the United States on May 21, 2026
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Johnny Leedy
Fort Morgan, US
★★★★★ 1
Watch stopped working
I want to return the watch I bought and this is the two year warrantee and it say I cant return it and its not been pass two years yet
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Reviewed in the United States on February 16, 2026
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J G
Los Angeles, US
★★★★★ 5
I am replacing one of John Camoran Swaey’s originals with his latest model!
As usual, Timex is still a GREAT PRODUCT!!!
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Reviewed in the United States on November 28, 2025
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JC
San Leandro, US
★★★★★ 4
New watch
Product works great and is comfortable to wear.
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Reviewed in the United States on December 9, 2024
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K Reed
San Leandro, US
★★★★★ 1
Not easy to get refund
I bought this for a watch. When it broke about 2 months in they told me to contact the Timex seller and ask them to help. I feel like it should have been a pretty simple "look at my broken watch." "oh, sorry about that but you bought insurance so here's your money" but it was not that. In the end I just bought a new watch because they made it too difficult to get help. Don't waste your money on the insurance.
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Reviewed in the United States on August 1, 2024

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