Linhai 500cc LH188MR Crankshaft

Linhai 500cc / 550cc Crankshaft (For LH188MR Engine) | Includes Linhai Cross-Reference

Replaces Linhai Part Number: 35121 / 1BE-11400-00

Overrunning Clutch Side: Thread 16mm

Clutch Carrier Side: Thread 18mm / 25mm(24T) / 40mm(21T) / 89mm(43T)

Compatible with Linhai 500cc/550cc models equipped with LH188MR 4-stroke water-cooled engines, and multiple Linhai ATV / UTV models

⚠️ Important Difference Note: Most parts of the Linhai 500cc/550cc engine are identical to the CFMoto CF188 engine. However, this crankshaft has a shorter flywheel rotor end because the Linhai 500cc/550cc engine does NOT have a kick starter. Please confirm that your model does not require a kick start function before purchasing.

This crankshaft assembly is a genuine Linhai quality replacement part, designed for 500cc/550cc models equipped with the LH188MR 4-stroke water-cooled engine. The crankshaft is the core component of the engine, converting the reciprocating motion of the piston into rotational motion to output power. Direct replacement for Linhai original part numbers 35121 or 1BE-11400-00.

This crankshaft is mostly identical to the CFMoto CF188 crankshaft, but has a shorter flywheel rotor end because the Linhai 500cc/550cc engine does not have a kick starter. Gear specifications on both ends are as follows:

• Direct OEM Replacement: Perfectly matches Linhai original part number 35121 / 1BE-11400-00 for precise fitment.
• High-Strength Alloy Steel: Forged from premium alloy steel with exceptional fatigue strength and wear resistance to withstand engine combustion pressure.
• Precision Machining: Main and connecting rod journals are precision ground for high surface finish and tight tolerances, ensuring proper fit with bearings.
• Dynamic Balance Correction: The crankshaft assembly undergoes precise dynamic balancing to minimize vibration at high speeds, extending engine life.
• Linhai-Specific Design: Shorter flywheel rotor end optimized for Linhai 500cc/550cc engines without kick starters.

✅ Importance of Crankshaft Replacement: The crankshaft is the most critical and highly stressed component of the engine. After long-term high-load operation, the crankshaft may develop main or connecting rod journal wear, fatigue cracks, or bending deformation. These issues can cause engine noise, increased vibration, low oil pressure, and in severe cases, crankshaft breakage leading to complete engine failure. During engine overhaul, if crankshaft dimensions are out of spec or damage is detected, timely replacement is essential to ensure engine performance and reliability.

⚠️ Important Note Before Ordering: This crankshaft has a shorter flywheel rotor end and is specifically designed for Linhai 500cc/550cc models WITHOUT a kick starter. Cannot be used on CFMoto CF188 engine models that require a kick starter. Please verify your original crankshaft specifications. Crankshaft replacement is a major engine overhaul procedure requiring professional knowledge and specialized tools. Must be installed by an experienced professional technician strictly following the service manual, with simultaneous replacement of bearings, oil seals, and related components.

📑 Complete Part Number Cross-Reference Summary:

Crankshaft: Linhai 35121 / 1BE-11400-00

This crankshaft is suitable for Linhai platform LH188MR engines. A core component that converts piston reciprocating motion into rotational motion, offering OEM quality reliability and durability.