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Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke in Kuwait

Racing Secondary Final Drive Gears 17/49 Compatible with ATM CY50 Evo Speed Thunder Zummer 50cc 4 Stroke

KWD 23
– 1 +

Special Features

  • Model Compatibility: Fits ATM CY50 Evo, Speed Thunder, and Zummer 50cc 4-stroke motorcycles as a direct replacement for the secondary/final drive gears.
  • Gear Ratio Specification: Features a 17-tooth front gear and 49-tooth rear gear, matching the 17/49 ratio specified for the.
  • Application Type: Designed specifically for use in the racing secondary/final drive system of compatible 50cc 4-stroke motorcycle models.
  • Functional Purpose: Restores drivetrain function by replacing worn or damaged secondary/final drive gears with dimensionally and operationally equivalent components.
  • Part Identification: Labeled as 139QMB and 139QMA, corresponding to the gear set identifiers provided in the part designation.

Description

This is a replacement secondary / final drive gear set for 50cc 4-stroke with 139QMB or 139QMA engines.The set includes a 17-tooth front gear and a 49-tooth rear gear, providing a 2.88 gear ratio.It is compatible with ATM, CY50, Evo, Speed, Thunder, and Zummer 50cc 4-stroke.This gear set is intended to replace worn or damaged and restore standard drivetrain function.Confirm compatibility with your specific model before installation.

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