219 Chain Primary Drive Kit (25T/57T) / SUR-RON Ultra Bee

Permanently secure the transmission of your Sur-Ron Ultra Bee with this primary chain conversion kit. No more anxiety about the belt breaking in the middle of an enduro ride due to mud or rocks!

This complete kit replaces the original belt with a reinforced 219 pitch chain (Karting standard, ultra-resistant). It is configured with a 25-tooth motor sprocket and a 57-tooth intermediate sprocket, offering an ideal transmission ratio to maintain original performance while enhancing reliability.

Treated steel sprockets guarantee a long lifespan, even in the most abrasive conditions (sand, mud). This is the essential upgrade for all riders who go off the beaten track.

Main Features:

• Total Reliability: The steel chain is not afraid of debris, mud, or torque overloads, unlike the belt.

• Optimized Ratio (25x57): The sprocket/chainring combination has been calculated to offer optimal performance on the Ultra Bee.

• Reinforced 219 Chain (Gold): High tensile strength, compact design, and smoother operation than a classic motorcycle chain.

• Durable Materials: Zinc-plated steel sprockets for excellent resistance to corrosion and wear.

• Ready-to-Assemble Kit: Delivered complete with the sprocket, chainring, chain cut to the correct length, and master link.

Technical Specifications:

• Compatibility: Exclusively for Sur-Ron Ultra Bee.

• Transmission Type: Primary (Motor to Secondary Shaft).

• Chain Pitch: 219.

• Motor Sprocket: 25 Teeth (25T).

• Intermediate Sprocket: 57 Teeth (57T).

• Includes:

  • 1x 25T motor sprocket

  • 1x 57T chainring

  • 1x 219 Chain (Gold Color)

  • 1x Master link

A word from Jo & Will:

This kit is super interesting because it uses a 25-tooth sprocket and a 57-tooth chainring. This allows for a very consistent gear ratio that doesn't bog down, while taking advantage of the incredible strength of the 219 pitch. It's robust, reliable, and prevents you from having to push your bike. A must-have.