Description
This Complete 5-Speed Gear Shaft Assembly is designed for CG125 and CG150 Honda-type pushrod engines and compatible Big Boy motorcycles.
The assembly includes both the main shaft and counter shaft (output shaft) complete with transmission gears, providing a reliable replacement for worn or damaged gearbox components.
Manufactured from hardened alloy steel and precision-machined for durability, the gear set delivers smooth gear engagement, efficient power transfer, and dependable performance for everyday commuting and delivery motorcycles.
Each assembly is gear mesh tested, shaft alignment inspected, and uniquely marked after inspection to ensure quality control and reduce incorrect or fraudulent returns.
A worn transmission gear set may cause difficult gear changes, gear slipping, excessive gearbox noise, or transmission failure.
Important:
Product images are for reference and resemblance only. They do not confirm the exact gear ratio, shaft configuration, or dimensions. This product is compatible with the models listed below.
If you are unsure whether this transmission assembly fits your motorcycle, please consult a qualified mechanic before purchasing.
Always compare your existing gearbox configuration before ordering.
Compatibility
CG125 (5-Speed Manual)
CG150 (5-Speed Manual)
Big Boy 125
Big Boy 150
Big Boy Velocity
Big Boy Monster
Big Boy Classic
Hero commuter motorcycles
Chinese CG-based 125cc / 150cc OHV (Pushrod) engines with 5-speed manual transmission
Note: Not compatible with Honda Ace (OHC), GY6 CVT scooters, or semi-automatic engines.
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Key Features
x Complete 5-speed transmission gear shaft assembly.
x Includes main shaft and counter shaft.
x Designed for CG125 and CG150 engines.
x Precision-machined gears for smooth gear changes.
x Tested, inspected, and uniquely marked.
Returns & Handling Policy
x Returns are not accepted on parts that have been installed, used, modified, damaged, or incorrectly fitted.
x Please verify compatibility before installation.
x Professional installation is highly recommended.
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What's in the box
1 x Main Shaft Assembly (Tested, inspected & uniquely marked)
1 x Counter Shaft Assembly
