Speedstar Valve Kit for Jinling Racing ATV 250 JLA-21B

Restore Maximum Compression! – Speedstar Valve Kit for Jinling Racing ATV 250 JLA-21B

Cylinder Head Precision – Premium intake & exhaust valve set for engine rebuilds

Bring your engine back to peak operating efficiency! The Speedstar Valve Kit is the perfect choice for a professional cylinder head overhaul on your Jinling Racing ATV 250 JLA-21B. This set includes one precision-ground intake valve and one highly thermal-resistant exhaust valve. Forged from high-grade, heat-treated steel alloys, these valves are engineered to withstand extreme combustion temperatures and high RPM demands. An ideal replacement for bent, worn, or leaking factory valves.

Technical Specifications & Details

• Component: Valve Kit (Intake & Exhaust Valve Set).

• Product Line: Speedstar (Heavy-duty design for extended service life).

• Package Includes: 1x Intake Valve, 1x Exhaust Valve.

• Compatibility: Jinling 250cc JLA-21B Racing ATV / Quad.

• Benefit: Perfect stem and face tolerances for optimized gas flow and airtight compression.

Installation & Maintenance Instructions: (For guidance purposes only)

• Visual Check: Before installation, perform a visual check. Match the overall length, stem diameter, and valve head diameter with your original parts.

• Valve Lapping: New valves must be lapped into the valve seats using fine valve grinding compound prior to final assembly to ensure a perfectly gas-tight seal.

• Valve Stem Seals: Always install new valve stem seals during assembly to prevent oil from leaking into the combustion chamber.

• Valve Clearance: After assembling the cylinder head, check and adjust the valve clearance on a completely cold engine using a feeler gauge according to factory specs.