Import Bike Engine — Buy in wholesale FOB from Supplier in China

The 156FMI bike engine from Chongqing Yexin Technology Industry Co., Ltd. is a single-cylinder four-stroke power unit with a 124 ml displacement, configured for 100-125 cc motorcycle applications. The engine employs an aluminium alloy body paired with a cast iron cylinder bore, a combination that balances weight reduction with wear resistance in the combustion chamber. Ignition is handled by a capacitor discharge ignition (CDI) system, and the compression ratio is described as optimised for power output and emissions control, though the exact ratio figure is not stated and should be requested from the supplier.

The 156FMI designation follows the common Chinese engine coding convention where 156 indicates the family series and FMI denotes air-cooled, horizontal orientation with specific mounting dimensions. Cast iron cylinder liners in aluminium blocks are standard for this displacement class, offering good heat dissipation through the alloy while maintaining dimensional stability in the bore during thermal cycling. Typical bore and stroke for 124 ml singles of this architecture are approximately 52.4 mm by 57.8 mm, yielding a stroke-to-bore ratio near 1.10 for torque-biased delivery. The CDI system replaces breaker-point ignition for more consistent spark timing and reduced maintenance, a standard fitment for engines produced after the mid-1990s.

This engine category serves motorcycle assembly plants in emerging markets, aftermarket replacement channels, and custom builders converting bicycles to motorised operation. Chongqing's concentration of motorcycle component manufacturing provides supply chain density for ancillaries such as carburettors, exhaust systems, and electrical components. Buyers should confirm whether the engine is supplied with carburettor, kick-starter, electric start, or both, plus whether a wiring harness and ECU are included. The source mentions flexible MOQ and certifications, but no specific quantities, standards, or lead times are provided, so direct confirmation with Yexin Technology is essential.

Chongqing Yexin Technology Industry Co., Ltd. is located in Hangu Town, Jiulongpo District, Chongqing 401329, China, placing it within one of China's principal motorcycle manufacturing clusters. The company holds a harbor trust tier with zero recorded response rate and zero average response hours, which may reflect a new listing, dormant account, or data collection gap rather than operational scale. No founding year, registered capital, employee headcount, factory floor area, or annual revenue figures are present in the available data.

The supplier's address situates it in Chongqing's western industrial belt, where numerous engine and component manufacturers operate with varying degrees of vertical integration. Buyers should verify whether Yexin Technology owns production facilities or operates as a trading company, as this affects quality control consistency and warranty enforcement. Request business licence verification, factory audit reports, and reference customers in export markets before committing to volume orders. The mention of 'flexible MOQ' and 'range of certifications' in the source lacks specificity and must be substantiated with documentation.