CG Guide of Valve

CG Valve Guide

🔧 Valve Guide · Valve Stem Guide · Engine Rebuild Part · CG125/CG150 Specific

For CG125, CG150 4-Stroke Engines · Ensures Stable Timing Chain Operation · Quality Replacement

This is the CG Valve Guide — a replacement valve guide for CG125 and CG150 4-stroke engines. This component is a critical part of the engine's valve train, ensuring precise valve guidance and contributing to stable timing chain operation. It is an ideal choice for engine overhaul or valve service.

The valve guide is installed in the cylinder head, providing a precise guide channel for the valve stem. It ensures vertical valve movement and proper seating while also helping to dissipate heat from the valve. When the valve guide wears, it can cause valve movement deviation, poor sealing, oil burning, and power loss. Replacing worn valve guides restores valve train precision, ensuring more stable timing chain operation and extending engine service life.

This valve guide is compatible with the following engines and vehicles:

• Engine Types: CG125, CG150 4-stroke engines
• Vehicle Types: Honda CG series, Chinese-made CG series motorcycles, dirt bikes, street bikes
• Mounting Location: Cylinder head, intake and exhaust valve positions
• Applications: Engine overhaul, worn valve guide replacement, oil burning repair, valve clearance issues

• High-Quality Material: Manufactured from premium cast iron or powder metal for excellent wear resistance, thermal conductivity, and self-lubricating properties.
• Precision Machining: Inner bore is precision-machined with high surface finish for smooth valve stem movement.
• Accurate Dimensions: Outer diameter is precisely sized for proper press fit in the cylinder head guide bore.
• OEM Specification Standards: Manufactured to CG125 and CG150 original specifications for perfect fitment.
• Stable Timing Chain Operation: Precise valve guidance ensures accurate valve timing, contributing to smoother and quieter timing chain operation.
• Essential Overhaul Component: Worn valve guides are a common issue during engine overhaul — this product is critical for restoring engine performance.

🔧 Installation Guide

1. Ensure the cylinder head is removed from the engine and thoroughly cleaned before installation.
2. Use a specialized tool to press the old valve guide out of the cylinder head.
3. Clean the cylinder head guide bore, removing any burrs or debris.
4. Apply a small amount of lubricant to the new valve guide and press it evenly into the cylinder head using a proper installation tool.
5. Ensure the guide is installed to the correct depth (refer to factory specifications).
6. Use a valve guide reamer to finish the inner bore to achieve the proper clearance with the valve stem (typically 0.02-0.05mm).
7. Clean thoroughly after reaming, install the valve, and check for smooth movement.
8. It is recommended to replace valve stem seals at the same time for reliable sealing.
9. This operation requires specialized tools and expertise — strongly recommend professional installation.

⚠️ Important Notice: This product is the CG Valve Guide, designed for CG125 and CG150 4-stroke engines.
Spec Confirmation: Before purchasing, verify that your engine is a CG125 or CG150 4-stroke to ensure compatibility.
Installation Caution: Valve guide installation requires specialized tools and professional skills. The guide must be reamed after installation to achieve proper valve stem clearance. Improper installation can cause valve sticking, poor sealing, or engine damage. Professional installation is strongly recommended. Product images are for reference only; please refer to the actual product.