E&C Razor #35 HD Ultralight Sprocket & Chain Kit

The ultimate chain and sprocket upgrade for your Extreme Razor Kit. Our Heavy-Duty #35 Ultralight Chain Kit is built to handle the savage power output of the Extreme Kit — delivering less wear, less maintenance, and no more thrown chains.

The rear sprocket is CNC-machined from 7075 aerospace-grade aluminum with maximum lightening holes to minimize rotating mass. Paired with a heavy-duty #35 chain, upgraded tensioner spring, and a direct-fit front sprocket for MY1020, EC4P, or The "ONE" motor — this kit is a complete, drop-in drivetrain upgrade.

Kit Includes

• 1x 65T E&C HD #35 Ultralight Rear Sprocket (7075 Aerospace Aluminum)
• 1x Heavy-Duty #35 Chain
• 1x Front #35 Sprocket — Spline (9T) or D-Bore (10T)
• 1x Upgraded Chain Tensioner Spring

Key Features

• Significantly stronger than stock chain offerings
• 7075 aerospace aluminum rear sprocket – maximum strength, minimum weight
• Upgraded tensioner spring eliminates chain throw
• Direct-fit front sprocket for MY1020, EC4P, and The "ONE" motor
• Reduced chain wear and maintenance vs. OEM alternatives
• Adds an aggressive drivetrain sound upgrade

Compatibility

• Razor MX500
• Razor MX650
• Razor SX500
• Razor RSF650

Not compatible with ETM or other bike models.

⚠️ Important Notes

• Refer to product photos to identify your motor shaft style (Spline or D-Bore) before ordering. No returns.
• A chain breaker tool is required for stock swing arms and may be needed in general.
• This kit uses different gear ratios than the stock OEM chain. A 9T front sprocket is highly recommended — a heavier chain increases load and heat.
• RSF650 owners: the stock chain tensioner may need to be removed for clearance. This mostly affects RSF bikes.

Lead Time: 3–5 Business Days ARO*