48mm Head & Base Gasket for 72-75cc Big Bores for Scooters & Mopeds

48mm Head and Base Gasket Set for QMB139 Engines

This gasket set is made for 48mm oversized cylinder kits fitted to QMB139 engines, the type typically used in scooters and mopeds. It works as a reliable replacement that helps keep a tight seal while the engine runs. Among our range of scooter gaskets and seals, this item is intended to support steady engine output and limit leaks. Its inner diameter measures 48mm, which matches the applications it is listed for.

Product Features

The set contains both a cylinder head gasket and a base gasket, so you have everything needed for a full engine reseal. Both gaskets are cut to suit a 71mm cylinder stud spacing, the standard spacing for QMB139 builds. Because it follows an OEM-style layout, it should line up with the original parts and make installation more straightforward during an engine overhaul.

When to Replace

These gaskets are best swapped out during a major engine rebuild, or when oil leaks or drops in performance appear. Staying on top of maintenance and replacing worn scooter gaskets and seals when needed can help avoid further engine damage and keep your scooter running dependably.

Specifications

• Inner Diameter: 48mm
• Cylinder Stud Spacing: 71mm
• Engine Compatibility: QMB139 (139QMB) 50cc/49cc 4-stroke
• Includes: Cylinder head gasket and base gasket
• Fits: QMB139 (139QMB) 4-stroke scooter engines with 48mm big bore cylinder kits (72-75cc)

Fitment

Fits:

• QMB139 (139QMB) 72cc/75cc 4-stroke scooters with 48mm big bore cylinder kits
• TaoTao, Roketa, Jonway, Wolf, Ice Bear, Vitacci, Peace Sports, Bintelli and other QMB139-based platforms

How to choose: Confirm your engine is a QMB139 (139QMB) and your cylinder is a 48mm big bore kit. This gasket set has a 48mm inner diameter and 71mm stud spacing.

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