Precise Fit for GY6 139QMB/139QMA Engines: Designed specifically for 49cc/50cc GY6 engines with 69mm valve length, ensuring seamless integration with OEM cylinder heads and maintaining factory valve timing specifications.
49mm Center-to-Center Side Hole Spacing: Engineered with exact 49mm hole spacing to match original mounting patterns — eliminates alignment issues and prevents premature wear from misalignment during installation.
26mm Side Height for Optimal Clearance: Maintains critical 26mm profile height to ensure proper clearance with engine casings and adjacent components, preventing interference under high-RPM operation.
Precision-Machined from High-Strength Alloy: Constructed with hardened steel and anti-wear surface treatment to resist deformation, fatigue, and valve train oscillation — extending service life under continuous high-torque conditions.
Direct OEM Replacement, No Modifications Required: Installs as a direct swap for worn or damaged factory assemblies — no grinding, drilling, or adjustment needed.
وصف
Camshaft and Rocker Arm Assembly for GY6 49cc/50cc 139QMB 139QMA Engines – Compatible with Scooters, Mopeds & ATVs (69mm Valve Length)