Heavy Hitter 520 Primary Chain Drive Conversion 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! For OEM Motor ONLY! Most aftermarket motors have a +4mm offset change. We are in process of an update to work with aftermarket motors.

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.

Please verify your bike model and year before purchasing. If you have questions about fitment, contact us at support@elektrischesracing.com or use the chat below — we’re riders, and we’ll help you get the right part.

Installation requirements vary by product and vehicle. Review the product description and available manufacturer instructions before installation. Contact support@elektrischesracing.com for fitment or installation questions.

Will this fit my bike?
Check the product title, description, and fitment details above for compatible models. Not sure? Email support@elektrischesracing.com or use live chat and we’ll confirm before you buy.

How long does shipping take?
Availability and estimated ship time for this exact item are shown above, next to Add to Cart. Processing and shipping times vary by product and fulfillment partner. In-stock orders fulfilled directly by Elektrisches Racing generally process within 1–3 business days; supplier-shipped, made-to-order and backordered items can take longer. Shipping rates and any available free-shipping offers are confirmed at checkout.

Do you offer financing?
Yes! Shop Pay Installments and Affirm are available at checkout.

What’s your return policy?
Eligible unused items may be returned within 14 days of delivery, subject to the store’s refund policy and exclusions. Baja Designs, Warp 9, GUTS Racing, Sur-Ron OEM and KO/EBMX products are not eligible for standard returns or exchanges through Elektrisches Racing; manufacturer warranty claims are handled by the manufacturer — see our Refund Policy for full details.