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 22 - Aug 27

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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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4.3 ★★★★★
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Verified Purchase
Just Carrie
West Palm Beach, US
★★★★★ 5
Comfortable
Size: 6, Color: Black
Great sandal! Fits great and comfy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
B
Verified Purchase
BJ Coyle
Waukegan, US
★★★★★ 5
Yes!
Size: 5, Color: Molasses
Love these, very comfortable. Tts
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Reviewed in the United States on June 13, 2026
N
Verified Purchase
Nunca me llegó el pedido
Whiting, US
★★★★★ 5
Muy suaves
Size: 6.5, Color: Black
Son muy cómodas me encantaron
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Reviewed in the United States on June 11, 2026
J
Verified Purchase
Jami
Waukegan, US
★★★★★ 2
Not the best
Size: 7, Color: Black, Size: 7, Color: Black
They are cute but they have a bit of an odd fit that isn’t great for people with narrow feet. They look too dressy to wear with super casual outfits in my opinion. I think the Ugg golden star sandals are much comfier. If you’re wearing these sandals for a really short time they’d be okay. After wearing them around my house for a little while I decided to return them since they started to hurt my feet.
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Reviewed in the United States on June 7, 2026
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Verified Purchase
Ms. Moon
Battle Creek, US
★★★★★ 3
Not for narrow feet, very lightweight.
Size: 7.5, Color: Black
My feet are slightly narrow; these were not adjustable enough to make secure. Otherwise they are cute. The material feels kind of light, these were my first attempt at UGGs so I'm not sure if that's typical or an actual quality issue. Either way, they don't seem very durable but I can't imagine these are meant for roughing it.
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Reviewed in the United States on May 8, 2026

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