| Model | CG145 |
| CYL DIA | 61 |
| TOTAL HIGH | 56.8 |
| COMP DIST | 28 |
| RING | 1.0*1.0*2.0 |
| PIN DIA | 15 |
| PIN LENGTH | 50.5 |
CYL DIA (Cylinder Diameter): 61 mm – This precision-machined large diameter is tailor-made for 145cc engines, ensuring a tight, leak-free fit within the cylinder bore to preserve peak compression. The 61mm size optimizes combustion pressure, delivering exceptional low-end torque (ideal for hauling 180+ kg cargo on tricycles or navigating steep rural roads on motorcycles) while balancing fuel efficiency for cost-conscious commercial and daily users.
TOTAL HIGH (Total Height): 56.8 mm – The substantial total height is a defining strength, engineered to withstand the high combustion forces of 145cc engines under load. It provides unmatched structural integrity, preventing warping or deformation even during prolonged high-torque operation, while fitting seamlessly into the CG145’s engine bay and most 145cc heavy-duty engine setups without modifications—ensuring compatibility with existing motorcycle parts or tricycle parts.
COMP DIST (Compression Distance): 26.9 mm – This carefully calculated distance optimizes the engine’s compression ratio for heavy-duty performance. It ensures efficient combustion in 145cc setups, generating enough power to climb steep hills with partial cargo, traverse unpaved terrain, or operate continuously for hours without straining the engine—essential for small business owners, farmers, and frequent commuters.
Piston Ring Dimensions: 1.2*1.2*2.5 mm – The (included) Piston ring set features ultra-thick 1.2mm primary/secondary compression rings and a 2.5mm oil control ring. This rugged design enhances sealing performance, prevents oil contamination of the combustion chamber, and resists wear from heavy use—critical for 145cc engines that operate under demanding conditions, such as daily cargo transport or farm chores.
PIN DIA (Piston Pin Diameter): 15 mm – The 15mm piston pin is engineered for maximum strength, capable of handling the cyclic stresses of 145cc combustion under load. Its robust diameter ensures a secure, low-friction connection to the connecting rod, supporting the piston’s ability to withstand the rigors of frequent use and heavy loads.
PIN LENGTH: 46 mm – This extended length provides stable, even support for the connecting rod, distributing pressure across the piston’s wrist pin boss to prevent lateral movement and premature wear. It ensures alignment even under extreme torque, safeguarding both the piston and rod from damage during heavy-load operation or aggressive acceleration.
High-Strength Forged Aluminum Alloy with Reinforced Stress Points – Constructed from forged 2024-T4 aluminum alloy, the CG145 Piston offers exceptional tensile strength and heat resistance (up to 370°C). Forging eliminates internal defects, creating a dense structure that can withstand the high pressure and temperature of 145cc combustion—ideal for tricycles hauling 200+ kg or motorcycles used for daily commercial runs. Critical stress points (e.g., wrist pin boss) are further reinforced with additional material to enhance durability.
CNC Precision Machining with Tight Tolerances – Every CG145 Piston undergoes rigorous CNC machining, with tolerances within 0.001mm. This ensures a perfect fit with the cylinder bore and Piston ring grooves, eliminating leaks and maintaining consistent compression even under load. Unlike generic pistons that require tedious adjustments, this part is ready for installation out of the box, saving time for mechanics and DIY enthusiasts.
Wear-Resistant Dual-Layer Skirt Coating – The piston’s skirt features a dual-layer coating: a base layer of nickel-phosphorus for corrosion resistance and a top layer of molybdenum disulfide for low friction. This combination reduces friction between the piston and cylinder wall by up to 40%, minimizes wear, and extends the piston’s lifespan by up to 65% compared to uncoated alternatives—critical for vehicles that log 25,000+ km annually.
Reinforced Crown Design – The piston crown is engineered with a thickened, heat-resistant profile to handle detonation and extreme heat, ensuring reliability even during prolonged high-torque operation. This design also enhances combustion efficiency, maximizing power output while reducing fuel waste.
CG145 Motorcycle Compatibility – It’s a direct replacement for all CG145 variants, including CG145 Base, CG145 Cargo, and CG145 Rural models. Whether you’re repairing a well-used CG145 that’s logged thousands of kilometers or restoring an older model, the CG145 Piston integrates seamlessly with the bike’s original motorcycle parts to restore factory-level load-bearing capacity and reliability.
145cc Utility Tricycle Compatibility – For 145cc utility tricycles used for small-scale commercial transport (e.g., local deliveries, farm-to-market hauling, or urban errand-running), the CG145 Piston is a rugged upgrade. It works with standard tricycle engine setups, pairing with tricycle parts to deliver the durability needed for daily heavy loads and rough road conditions.
145cc Small-Engine Compatibility – Beyond two and three-wheelers, the CG145 Piston fits 145cc small-engine machinery (e.g., medium-duty generators, agricultural pumps, or small construction equipment) that requires consistent performance under load, expanding its utility across engine parts applications.
Exceptional Low-End Torque for Heavy Loads – The precision 61mm cylinder diameter and optimized 26.9mm compression distance ensure maximum compression, delivering a significant boost in low-end torque (up to 13.5 N·m). This makes CG145 motorcycles capable of hauling heavy luggage or navigating rough terrain, while tricycles can handle 180+ kg cargo with ease—critical for enhancing productivity for small businesses and farmers.
Improved Fuel Efficiency Under Load – By maintaining a tight seal with the thickened Piston ring set and reducing friction, the CG145 Piston cuts fuel waste by up to 11% compared to worn or generic pistons—even under partial to full load. For daily users logging 100km weekly, this translates to monthly fuel savings of $18–$25, reducing operational costs over time.
Reliable Operation in Demanding Conditions – The high-strength materials and heat-resistant design prevent engine overheating and piston failure in extreme conditions, such as operating in 40°C+ temperatures, hauling cargo on unpaved roads, or running continuously for 8+ hours. Users report consistent performance even in harsh environments, reducing downtime and repair costs.
Reduced Maintenance Frequency – The anti-wear coating and reinforced design minimize wear on the piston, cylinder walls, and connecting rod, extending the engine’s overall lifespan. Many users report their engines running reliably for an additional 30,000km after installing the CG145 Piston—saving time and money on frequent repairs.
CG145-Specific Heavy-Duty Engineering – Unlike generic pistons designed for “one-size-fits-all” small engines, it’s engineered exclusively to match the CG145’s engine specifications. This ensures perfect fit, optimal compression, and performance that aligns with the vehicle’s original heavy-load design.
Balanced Durability & Efficiency – It’s built to deliver both rugged durability for heavy use and fuel efficiency for cost-conscious users, catering to the diverse needs of 145cc vehicle owners—from farmers and small business operators to daily commuters.
Dual-Vehicle Versatility – It works seamlessly with both motorcycle parts and tricycle parts, making it a versatile solution for users who own multiple 145cc vehicles or small repair shops serving rural and commercial clients.
OEM-Grade Reliability – The CG145 Piston meets or exceeds original equipment manufacturer (OEM) standards for the CG145, ensuring it’s a direct, safe replacement for factory parts. Unlike cheap imports, it’s tested for performance under load and harsh conditions before leaving the facility.
| Model | CG145 |
| CYL DIA | 61 |
| TOTAL HIGH | 56.8 |
| COMP DIST | 28 |
| RING | 1.0*1.0*2.0 |
| PIN DIA | 15 |
| PIN LENGTH | 50.5 |
CYL DIA (Cylinder Diameter): 61 mm – This precision-machined large diameter is tailor-made for 145cc engines, ensuring a tight, leak-free fit within the cylinder bore to preserve peak compression. The 61mm size optimizes combustion pressure, delivering exceptional low-end torque (ideal for hauling 180+ kg cargo on tricycles or navigating steep rural roads on motorcycles) while balancing fuel efficiency for cost-conscious commercial and daily users.
TOTAL HIGH (Total Height): 56.8 mm – The substantial total height is a defining strength, engineered to withstand the high combustion forces of 145cc engines under load. It provides unmatched structural integrity, preventing warping or deformation even during prolonged high-torque operation, while fitting seamlessly into the CG145’s engine bay and most 145cc heavy-duty engine setups without modifications—ensuring compatibility with existing motorcycle parts or tricycle parts.
COMP DIST (Compression Distance): 26.9 mm – This carefully calculated distance optimizes the engine’s compression ratio for heavy-duty performance. It ensures efficient combustion in 145cc setups, generating enough power to climb steep hills with partial cargo, traverse unpaved terrain, or operate continuously for hours without straining the engine—essential for small business owners, farmers, and frequent commuters.
Piston Ring Dimensions: 1.2*1.2*2.5 mm – The (included) Piston ring set features ultra-thick 1.2mm primary/secondary compression rings and a 2.5mm oil control ring. This rugged design enhances sealing performance, prevents oil contamination of the combustion chamber, and resists wear from heavy use—critical for 145cc engines that operate under demanding conditions, such as daily cargo transport or farm chores.
PIN DIA (Piston Pin Diameter): 15 mm – The 15mm piston pin is engineered for maximum strength, capable of handling the cyclic stresses of 145cc combustion under load. Its robust diameter ensures a secure, low-friction connection to the connecting rod, supporting the piston’s ability to withstand the rigors of frequent use and heavy loads.
PIN LENGTH: 46 mm – This extended length provides stable, even support for the connecting rod, distributing pressure across the piston’s wrist pin boss to prevent lateral movement and premature wear. It ensures alignment even under extreme torque, safeguarding both the piston and rod from damage during heavy-load operation or aggressive acceleration.
High-Strength Forged Aluminum Alloy with Reinforced Stress Points – Constructed from forged 2024-T4 aluminum alloy, the CG145 Piston offers exceptional tensile strength and heat resistance (up to 370°C). Forging eliminates internal defects, creating a dense structure that can withstand the high pressure and temperature of 145cc combustion—ideal for tricycles hauling 200+ kg or motorcycles used for daily commercial runs. Critical stress points (e.g., wrist pin boss) are further reinforced with additional material to enhance durability.
CNC Precision Machining with Tight Tolerances – Every CG145 Piston undergoes rigorous CNC machining, with tolerances within 0.001mm. This ensures a perfect fit with the cylinder bore and Piston ring grooves, eliminating leaks and maintaining consistent compression even under load. Unlike generic pistons that require tedious adjustments, this part is ready for installation out of the box, saving time for mechanics and DIY enthusiasts.
Wear-Resistant Dual-Layer Skirt Coating – The piston’s skirt features a dual-layer coating: a base layer of nickel-phosphorus for corrosion resistance and a top layer of molybdenum disulfide for low friction. This combination reduces friction between the piston and cylinder wall by up to 40%, minimizes wear, and extends the piston’s lifespan by up to 65% compared to uncoated alternatives—critical for vehicles that log 25,000+ km annually.
Reinforced Crown Design – The piston crown is engineered with a thickened, heat-resistant profile to handle detonation and extreme heat, ensuring reliability even during prolonged high-torque operation. This design also enhances combustion efficiency, maximizing power output while reducing fuel waste.
CG145 Motorcycle Compatibility – It’s a direct replacement for all CG145 variants, including CG145 Base, CG145 Cargo, and CG145 Rural models. Whether you’re repairing a well-used CG145 that’s logged thousands of kilometers or restoring an older model, the CG145 Piston integrates seamlessly with the bike’s original motorcycle parts to restore factory-level load-bearing capacity and reliability.
145cc Utility Tricycle Compatibility – For 145cc utility tricycles used for small-scale commercial transport (e.g., local deliveries, farm-to-market hauling, or urban errand-running), the CG145 Piston is a rugged upgrade. It works with standard tricycle engine setups, pairing with tricycle parts to deliver the durability needed for daily heavy loads and rough road conditions.
145cc Small-Engine Compatibility – Beyond two and three-wheelers, the CG145 Piston fits 145cc small-engine machinery (e.g., medium-duty generators, agricultural pumps, or small construction equipment) that requires consistent performance under load, expanding its utility across engine parts applications.
Exceptional Low-End Torque for Heavy Loads – The precision 61mm cylinder diameter and optimized 26.9mm compression distance ensure maximum compression, delivering a significant boost in low-end torque (up to 13.5 N·m). This makes CG145 motorcycles capable of hauling heavy luggage or navigating rough terrain, while tricycles can handle 180+ kg cargo with ease—critical for enhancing productivity for small businesses and farmers.
Improved Fuel Efficiency Under Load – By maintaining a tight seal with the thickened Piston ring set and reducing friction, the CG145 Piston cuts fuel waste by up to 11% compared to worn or generic pistons—even under partial to full load. For daily users logging 100km weekly, this translates to monthly fuel savings of $18–$25, reducing operational costs over time.
Reliable Operation in Demanding Conditions – The high-strength materials and heat-resistant design prevent engine overheating and piston failure in extreme conditions, such as operating in 40°C+ temperatures, hauling cargo on unpaved roads, or running continuously for 8+ hours. Users report consistent performance even in harsh environments, reducing downtime and repair costs.
Reduced Maintenance Frequency – The anti-wear coating and reinforced design minimize wear on the piston, cylinder walls, and connecting rod, extending the engine’s overall lifespan. Many users report their engines running reliably for an additional 30,000km after installing the CG145 Piston—saving time and money on frequent repairs.
CG145-Specific Heavy-Duty Engineering – Unlike generic pistons designed for “one-size-fits-all” small engines, it’s engineered exclusively to match the CG145’s engine specifications. This ensures perfect fit, optimal compression, and performance that aligns with the vehicle’s original heavy-load design.
Balanced Durability & Efficiency – It’s built to deliver both rugged durability for heavy use and fuel efficiency for cost-conscious users, catering to the diverse needs of 145cc vehicle owners—from farmers and small business operators to daily commuters.
Dual-Vehicle Versatility – It works seamlessly with both motorcycle parts and tricycle parts, making it a versatile solution for users who own multiple 145cc vehicles or small repair shops serving rural and commercial clients.
OEM-Grade Reliability – The CG145 Piston meets or exceeds original equipment manufacturer (OEM) standards for the CG145, ensuring it’s a direct, safe replacement for factory parts. Unlike cheap imports, it’s tested for performance under load and harsh conditions before leaving the facility.