Upper / Lower Main Bearing Black

CFMoto Upper/Lower Main Bearing - Black (Set)

Part Numbers: 0NYV-011003-1000-Q0-00003 (Upper) / 0NYV-011004-1000-Q0-00003 (Lower)

🔧 Main Bearings · Engine Internal · Crankshaft Bearings

OEM quality · Replace as a pair · Ensures smooth crankshaft operation

This is a genuine CFMoto Upper/Lower Main Bearing - Black set, including Upper Main Bearing 0NYV-011003-1000-Q0-00003 and Lower Main Bearing 0NYV-011004-1000-Q0-00003. Main bearings are among the most critical precision components in an engine. They are installed in the crankshaft main bearing saddles to support the crankshaft, bearing the immense impact and rotational loads from piston movement, ensuring smooth crankshaft operation. This product features a black color code, indicating a specific size grade. This direct replacement set restores engine precision and performance by replacing worn or damaged original main bearings, preventing noise and engine failure caused by excessive clearance. Compatible with CFMoto SSV and UTV models equipped with 380Y-2A and 380Y-3 engines.

This Main Bearing Set fits the following CFMoto models:

• OEM OE Quality: Manufactured strictly to original specifications, ensuring wall thickness accuracy, oil groove geometry, and material properties identical to the original part.
• High-Quality Alloy Material: Made from high-strength, fatigue-resistant copper-lead or aluminum-tin alloy with a wear-resistant overlay, offering excellent load capacity and wear performance.
• Precision Machined: Inner diameter precision machined to ensure proper clearance with the crankshaft journal as per design specifications.
• Color Coded: Black identification indicates a specific size grade, allowing technicians to select the correct bearing based on measurements during overhaul.
• Supplied as a Pair: Upper and lower bearings are supplied as a matched set, ensuring the same grade is used for each main journal.
• Direct Replacement: Perfect bolt-in fit when installed according to the factory service manual, ensuring proper engine rebuild quality.

🛑 Importance of Main Bearings

Main bearings are among the most critical precision components in an engine. They support the crankshaft, bearing the immense impact and rotational loads generated by the pistons. An oil film between the main bearings and crankshaft journals provides hydrodynamic lubrication. If main bearings become worn, scored, or suffer from overlay spalling, clearance increases, oil pressure drops, noise develops, and in severe cases, "bearing seizure" can occur, destroying the crankshaft and engine block. Therefore, during engine overhaul, precise measurement of crankshaft journals and selection of the correct grade of genuine main bearings with proper installation clearance are essential. Timely replacement with this genuine-quality main bearing set is critical to restoring your CFMoto engine's performance and extending its life after an overhaul.

⚠️ Fitment Note: This set contains Upper/Lower Main Bearings - Black. It fits Z10 series SSV models with 380Y-2A engine and UForce 1000 series UTV models with 380Y-3 engine. Before ordering, always verify your engine model and main bearing size grade to ensure the correct color specification.