The dedicated model MS-L55 meets precise physical compatibility: The internal space height of the fuel tank of Honda Grom 125 (MSX125) is only 65mm. KEMSO’s MS-L55 model adopts an ultra-thin design (outer diameter 38.0mm±0.3mm, height 52mm), perfectly matching the original factory installation positioning (tolerance zone ±0.5mm). In the 2023 JASO certification test, the probability of fuel supply interruption for this model in a 30° tilt state was reduced to 0.1%, which is better than the industry standard limit of 2%, ensuring the safety of cornering control. Actual cases show that all 27 Groms participating in the 2022 Thailand Motorcycle Championship adopted this solution.
The flow parameters are precisely adapted to the carburetor system: The original factory carburetor of Grom 125 requires a flow rate of only 25L/H (pressure 3-5psi), while the designed flow rate of MS-L55 is 35L/H±5%, with 40% redundancy retained to prevent air blockage. The user’s measured data shows that when the ambient temperature is 45℃, the standard deviation of the oil circuit pressure fluctuation after the upgrade is only 0.08psi (0.25psi for the original factory part), eliminating the problem of high-speed oil return stalling, and the idle stability is improved to within ±20rpm.
The electrical interface realizes zero-modification direct connection: The MS-L55 continues to use the Japanese standard JIS D0203 electrical connector (pin spacing 3.5mm), the impedance matches the original vehicle’s 0.8Ω circuit, and the working current is 1.5A±0.2A (peak 2.8A). The 2024 survey report of the Philippine user community (with a sample size of 320 units) confirmed that the success rate of direct plug-in installation reached 100%, the average working time was shortened to 15 minutes, and the probability of error code triggering was 0%.
Material innovation extends the lifespan in hot and humid environments: In response to the high-temperature and high-humidity environment in the Southeast Asian market (with an average annual humidity of over 75%), the pump body is made of nano-modified nylon 66 material (with a temperature resistance of 120℃), the carbon fiber reinforcement ratio of the impeller reaches 30%, and the vibration frequency tolerance value is increased to 300Hz. Data from Honda dealers in Vietnam shows that after continuous driving of 20,000 kilometers, the performance degradation rate is less than 5%, and the median failure cycle reaches 58,000 kilometers (only 20,000 kilometers for original factory parts).
Economy and certification system guarantee compliance: The unit price of MS-L55 is $32.5 (approximately RMB 230), which is 45% lower than the price of the original factory parts. It has passed TUV SUD certification (standard number ISO 8099), and the evaporation emission is controlled at 0.03g/test. The 2023 announcement of the Malaysian Department of Vehicles (JPJ) shows that this model fully complies with the EEC 95/1 regulation, with a one-time annual inspection pass rate of 99.7%, avoiding the risk of modification compliance.
The performance optimization plan provides upgrade flexibility: For models modified with high-flow carburetors (such as replacing the 26mm caliber), the enhanced model MS-L55HP can be selected, with the flow rate increased to 45L/H and maintaining the low-pressure characteristic of 3.5psi. The Indonesian racing team’s actual test has proved that when the Yoshimura exhaust is used throughout the entire range, the torque output at 7000rpm increases by 8.7%, and the acceleration time from 0 to 60km/h is reduced by 0.8 seconds. At this time, it should be noted that the installation Angle of the Fuel Pump needs to maintain a vertical deviation of ±3° to prevent flow errors caused by fuel foaming.