| Main Technical Specifications | ||
| SN | Parameter | Value |
| 1 | Engine Model | 152FMI‑4 |
| 2 | Engine Common Name | KBS125 |
| 3 | Engine Type | Single‑cylinder,4‑stroke,air‑cooled,manual clutch |
| 4 | Displacement | 124.8 ml |
| 5 | Max. Power | 7.0 kW /7500 r/min |
| 6 | Max. Torque | 10 N·m /5000 r/min |
| 7 | Compression Ratio | 9.5:1 |
| 8 | Bore × Stroke | 52.4 mm ×57.9 mm |
| 9 | Ignition Method | CDI |
| 10 | Lubrication Mode | Pressure and Splash |
| 11 | Min. Fuel Consumption | ≤354 g/kW·h |
| 12 | Starting Method | Electric / Kick start |
| 13 | Clutch | Manual clutch |
| 14 | Gearshift | Constant‑mesh two‑stage transmission,5‑speed |
| 15 | Package Size | 385 ×365 ×495 |
| 16 | Package Weight | |
| Main Performance Features | ||
| SN | Items | Description |
| 1 | New compact cylinder‑head design: | 1. Low‑noise structure; 2. optimized low‑mid‑speed torque intake‑exhaust port and swirl combustion‑chamber for higher charging‑efficiency, better combustion and thermal‑efficiency; 3. optimized air‑duct and 40° exhaust‑port angle to reduce thermal‑load and extend service‑life. |
| 2 | High-Temperature Resistant Exhaust Valve | Revised cam‑profile and tensioner structure; reliable and easy‑to‑maintain. |
| 3 | Optimized valve‑train: | High‑Cr silent timing‑chain: Stable valve‑train, low noise and high durability. |
| 4 | Hot‑assembled crankcase: | 1. Extra 4 fastening bolts inside crankcase for higher housing rigidity; 2 additional bearing pressure plates reduce crankshaft axial‑play noise; 3. sealant instead of paper gasket for better sealing; 4. optimized waste‑gas labyrinth for efficient gas circulation. |
| 5 | Optimized crank‑rod & piston assembly: | Light‑weight components for lower vibration. |
| 6 | Improved shift‑system: | Dual shift‑fork shaft support; powder‑metallurgy shift‑plate for lighter, smoother gear‑changing with clear feedback. |
| 7 | High‑flow split oil‑pump: | Oil output increased by 10 %, improve lubrication & cooling. |
| 8 | Thin‑wall lightweight piston‑rings: | Reduce friction loss. |
| 9 | Centrifugal cast cylinder liner: | High‑precision and high‑strength. |
| 10 | Optimized main‑counter shaft gear‑ratio: | 1. Balanced high‑low‑speed power output; 2. passed 300‑hour heavy‑duty durability test. |
| 11 | Dual‑start: | Electric‑start and kick‑start for diversified usage. |
