GY6 STORE 50mm Bore Cylinder Head & Base Gasket Set For 100cc / 81cc QMB139 Engines

Rebuilding a GY6 or QMB139 engine?

This gasket set from GY6 STORE has you covered for the top end.

It includes both the cylinder head gasket and the cylinder base gasket.

This set is designed for engines with a 50mm bore, which typically corresponds to 81cc or 100cc QMB139 engines.

It's a new, direct replacement part.

The OEM part number it relates to is M137, and the manufacturer part number is 87954-N.

If you're doing a top end rebuild or just replacing worn gaskets, having these on hand is essential.

They ensure a proper seal between the cylinder head and the cylinder, and between the cylinder and the crankcase.

No more compression leaks or oil seepage.

A small but crucial part of any engine job for your scooter or small displacement bike.