Bearing 6203-RZ for Right Crankcase

CFMoto Bearing 6203-RZ (for Right Crankcase)

OEM Part Number 30400-01703 (Old P/N: GB/T276/6203-RZ)

Deep Groove Ball Bearing with Shield, Dimensions: 17x40x12mm, fits multiple CFMoto 110cc-600cc engines.

This 6203-RZ bearing is a high-quality OEM replacement for CFMoto, part number 30400-01703, conforming to national standard GB/T276/6203-RZ. It is a deep groove ball bearing with a shield on one side, with dimensions 17mm (ID) x 40mm (OD) x 12mm (Width). It is typically installed in the right crankcase to support the crankshaft or transmission main shaft, ensuring smooth rotation.

The "RZ" suffix indicates a low-friction seal on one side of the bearing, which effectively prevents dust and contaminants from entering the bearing while retaining lubricating grease, thereby extending the bearing's service life.

Bearings are critical rotating support components within an engine. Operating under high load and high speed, they can wear, develop play, create noise, or even seize, leading to poor engine performance, abnormal sounds, or severe damage. During an engine overhaul, it is standard practice to replace all bearings.

• Direct OEM Replacement: Perfectly matches CFMoto part number 30400-01703, ensuring precise fitment.
• Shielded Design: The RZ shield on one side effectively prevents contamination ingress while retaining grease, extending bearing life.
• Standard 6203 Size: Inner diameter 17mm, outer diameter 40mm, width 12mm, meeting international bearing standards for high interchangeability.
• High-Quality Bearing Steel: Made from high-purity bearing steel for excellent wear resistance and long contact fatigue life.
• Precision Machined: Raceways and rolling elements are precision ground for high rotational accuracy and low noise.

✅ Bearing Replacement Tip: Bearings are precision components. Use appropriate tools (like a bearing driver set) to apply even pressure during installation. Never strike the bearing directly with a hammer, as this can cause damage. Ensure the bearing bore is clean and free of burrs, and apply a light coat of oil to the bearing before installation.

⚠️ Verify Before Ordering: The 6203-RZ bearing is a standard part, but its specific application may vary between models. Please confirm that the bearing you need to replace has the dimensions: Inner Diameter 17mm, Outer Diameter 40mm, Width 12mm (6203-RZ), and note the shield orientation if applicable.