Blue Line Cam Chain Tensioner Kit - 139QMB 50cc

Keep the timing chain properly tensioned on your 139QMB 50cc four-stroke scooter with this Blue Line cam chain tensioner assembly. It replaces the adjuster hardware at the cylinder, helping the chain stay controlled as the engine runs. The photo shows the tensioner body alongside its spring, cap, gasket, O-ring, and mounting bolts.

Key Features

• Timing-chain control: Replaces the cam-chain adjuster/tensioner on compatible 139QMB engines.
• Assembly shown: Tensioner body with spring, cap, sealing pieces and two mounting bolts pictured.
• Engine-based fit: Suitable for listed Chinese-built 50cc four-stroke scooters that use the 139QMB/QMB139 engine and matching tensioner mount.

Technical Specifications

• Brand: Blue Line
• Part number: 1100-1299
• Part type: Cam-chain tensioner / adjuster assembly
• Engine family: 139QMB / QMB139 50cc four-stroke
• Appearance: Metal two-bolt mounting body; spring, cap, gasket and O-ring shown in product photo
• Note: Cam chain is not included.

Compatibility

Match your original tensioner and mounting pattern when ordering; model names alone do not identify the engine fitted to every scooter.

• Cam-chain tensioner assembly for compatible 139QMB/QMB139 50cc four-stroke engines
• Two-bolt metal tensioner body shown with spring and cap
• Gasket, O-ring and two mounting bolts pictured
• Cam chain not included

Blue Line cam-chain tensioner/adjuster assembly; SKU 1100-1299; 139QMB/QMB139 50cc four-stroke engine family; two-bolt metal housing, spring, cap, gasket, O-ring and mounting bolts pictured; cam chain not included; check original mounting pattern.

139QMB/QMB139 (GY50) 50cc four-stroke scooters with matching two-bolt cam-chain tensioner; listed model families include Tao Tao ATM50A1, ZNEN Q, Bintelli, Peace Sports, Icebear, Jonway, Wolf and SUNL 50cc applications. Match engine and original tensioner mount.