GY6 2mm Cylinder Spacer

2mm Cylinder Spacer for GY6 Engines

This 2mm spacer is made for GY6 engines and comes in two versions: A-Case, with 54mm cylinder stud spacing, and B-Case, with 57mm spacing. It helps increase the clearance between the piston and valves, which matters most when a stroker crank is fitted. You can find it among GY6 scooter parts that can meaningfully influence engine performance and reliability during builds.

Build Quality

The spacer is machined from aluminum, so it stays light while still offering good strength for everyday use. The shape lines up accurately on both A-Case and B-Case engines, so it suits a range of GY6 setups. Aluminum also handles wear and heat well, which is useful in demanding builds.

What You Need for Installation

A separate cylinder base gasket must be used with this spacer to seal properly and keep the engine running as it should. If engine work is new to you, have a mechanic handle the job or follow a step-by-step guide. Fitting it correctly protects the engine and its performance.

Specifications

• Material: Aluminum
• Size: 2mm
• Position: Cylinder Spacer
• Fits: GY6 engines with A-Case (76mm diagonal) or B-Case (80.5mm diagonal) cylinder stud spacing

Compatibility

Compatible with:

• GY6 QMI/QMJ 152/157 (A-Case, 76mm diagonal)
• GY6 B-Case big block engines (80.5mm diagonal)

Choosing the right one: Check the diagonal distance between the cylinder studs. It should be 76mm for A-Case or 80.5mm for B-Case. Pick the version that matches your engine.

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