Direct Bikes DB50QT-11 Cylinder Head Non SLS (64mm Valve). Valve length: 64mm. 139QMA/B Cylinder Head Non SLS version. Dispatched without SLS. This can be blanked off, which leads to quieter running and slightly more torque. Complete cylinder head for 50cc 139QMB / QMA engines.
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139QMA/B Cylinder Head Non SLS version
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This component will fit the Direct Bikes DB50QT-11 Sports 50cc 4 stroke scooter
Product Description
Complete cylinder head for 50cc 139QMB / QMA engines. Unlike many other available cylinder heads, this is a complete head. That means: valves, valve springs, valve shaft seals etc. This head is ready to install, with no need for grinding valves or fumbling with springs, or specialist tools.
Dispatched without SLS. This can be blanked off, which leads to quieter running and slightly more torque.
Valve length: 64mm
Cam shaft and rocker arm assembly not included. Delivery as shown. Please note: For Sym scooters this kit is only suitable for the GY6 139QMB engine version and not the XS1P139QMB, AV05W or AW05W engine or the Sym Symply 2 models
SKU : BT12277
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