GY6 Camshaft - NCY

Looking to wake up the low-end power on your GY6 build? The NCY A8 Performance Camshaft is a smooth, reliable upgrade that helps the engine pull harder off the line without needing a full race setup. It pairs especially well with big-bore cylinders, big-valve heads, and performance exhausts, making throttle response feel stronger and more lively in everyday riding.

The Details

The NCY A8 cam is designed for riders who want more torque and throttle response without pushing their engine into full race-bike territory. NCY optimizes the intake and exhaust lobes to change how the valves open and close, improving cylinder filling at lower RPM and giving your GY6 noticeably stronger low-end pull — especially when combined with a larger displacement kit.

This camshaft pairs great with common GY6 upgrades like big-bore cylinders, big-valve heads, and free-flowing exhaust systems. It keeps the bike fun and punchy around town while staying friendly for daily riding. Built in Taiwan under ISO 9001-certified quality control, it offers consistent performance from a brand that’s trusted in the scooter world — not no-name cast parts.

Why Riders Choose the NCY A8

• Better low-end response for takeoff, traffic, and hills
• Pairs well with big-bore kits, big-valve heads, and performance exhausts
• Daily-rider friendly profile — not an overly aggressive race cam
• Taiwan-built quality from NCY with ISO 9001-certified production

Specifications

• Intake Lobe: 26.25 × 19.8 × 10.3 mm
• Exhaust Lobe: 26.15 × 19.56 × 8.4 mm
• Bearing Size: 32 × 8 mm (2 TPI)
• Sprocket Teeth: 34
• Outer Diameter (OD): 66.75 mm
• Inner Diameter (ID): 15 mm
• Height: 3 mm

Compatibility Overview

Designed for 157QMJ-based 125cc / 150cc / 169cc engines including: 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A and similar QMJ / QMK / QMI motors.

Important Things to Note

• Not compatible with Genuine scooters even if they use a GY6 engine.
• If your engine code contains QM or FM, this camshaft is generally a fit for that motor family.
• For best results, pair with a performance head — very restrictive stock heads can choke airflow and limit gains.
• As with all performance parts, this camshaft is intended for off-road or closed-course use only, where applicable.

Always verify your engine code before ordering. If you’re unsure whether this cam will work with your setup, reach out and we can help confirm compatibility.

What's Included

• NCY A8 Performance Camshaft for GY6
• Pre-installed bearings (as supplied by NCY)
• Packed and ready for installation into compatible 157QMJ-based engines

You’ll reuse your existing cam gear hardware and associated top-end components unless otherwise upgraded in your build.