Blue Line 10x16mm Cylinder Base Dowel Pins | GY6 125cc/150cc

Ensure precise cylinder-to-crankcase alignment on your GY6 engine with this OEM 10x16 cylinder base dowel pin pair. These hollow steel locating pins keep the cylinder perfectly indexed to the crankcase during assembly, preventing gasket blowout and maintaining proper compression. Sold as a pair (2 pins).

Engine Code Compatibility

Fits 157QMJ-based 125cc and 150cc GY6 4-stroke engines with the following engine codes:

• 157QMJ, 161QMK, 152QMI, 1P61QMK
• YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ
• 1P57QMJ, BN157QMJ, BN161QMK-A, and other QMJ / QMK / QMI variants

Don't see your engine code? If it includes "QM" or "FM", this pin is likely compatible with your engine.

Key Features

• OEM Specification: Matches factory dimensions for precise cylinder-to-crankcase alignment.
• Hollow Steel Construction: Durable steel with hollow bore for lightweight precision fitment.
• Prevents Gasket Blowout: Correct alignment reduces the risk of head gasket and base gasket failure.
• Sold as a Pair: Includes both pins needed for a complete engine rebuild or cylinder replacement.

Technical Specifications

• Outer Diameter: 10mm
• Length: 16mm
• Quantity: 2 pins (sold as a pair)
• SKU: 164-186

California Prop 65 Warning: www.p65warnings.ca.gov

• OEM dimensions for precise cylinder-to-crankcase alignment
• Hollow steel construction — durable and lightweight
• Prevents gasket blowout by maintaining correct cylinder indexing
• Fits GY6 157QMJ-based 125cc and 150cc engines
• Sold as a pair — includes both pins needed for a complete rebuild

SKU: 164-186 | OD: 10mm | Length: 16mm | Material: Steel | Qty: Pair (2 pins) | Fitment: GY6 125cc/150cc 157QMJ-based engines

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