The requested option is unavailable

The option in your link is not available to order. Details below may show a different option. Choose an available option before adding it to your cart.

Choose an available option

NCY 139QMB clutch shoe spring set — blue, supplier-listed 1000 RPM

NCY Performance Clutch Springs, Set of 3 - 139QMB 50cc GY6

Shop NCY

NCY Performance Clutch Springs, Set of 3 - 139QMB 50cc GY6

$11.00

Part number 1200-1052 1000 RPM

Check dimensions and compatibility before ordering.

Same-day dispatch on in-stock orders

Order before 2 PM Central, Monday–Friday. Holidays excluded.

Shipping rates shown at checkout

Available methods and rates depend on your basket and destination.

Request a return within 30 days of ordering

Read the return policy

Description

These NCY Performance Clutch Springs (SKU 1200-1052) are one of the most effective upgrades for 139QMB (QMB139) 50cc scooters, the Chinese GY6 50cc platform based on Honda's GY6 design. Stiffer clutch springs make the clutch engage at a higher engine RPM, so the scooter launches in the meat of its powerband for noticeably quicker acceleration off the line. Each set includes three springs.

This product is intended for off-road use only. This product is not intended for use on public roads or land.

Features

Quicker launches: Higher clutch engagement RPM puts more power to the ground from a stop.
Three stiffness options: Choose 1000, 1500, or 2000 RPM to dial in your setup.
Complete set: Three springs, one for each clutch shoe.
Color-coded: Blue, yellow, or red for easy identification.

Specifications

Spring rating	1000 RPM

Part number: 1200-1052
Quantity: Set of 3
Ratings available: 1000 RPM (blue), 1500 RPM (yellow), 2000 RPM (red)
Engine: 139QMB / QMB139 50cc 4-stroke
Brand: NCY

Spring Color Guide

Color	Engagement RPM	Best For
Blue	1000 RPM	Stock / low-end engagement
Yellow	1500 RPM	Street / medium engagement
Red	2000 RPM	Race / high-RPM engagement

Model Fitment

Engine	Engine Codes
GY6 50cc 4-stroke	139QMB, QMB139

Check the engine code stamped on your engine case before ordering. Engines marked 139QMB may use this part, but compare your original clutch springs with the photos to confirm fit.

Tuning Guide

A higher RPM rating means a stiffer spring and later clutch engagement. Blue keeps engagement smooth for stock or lightly modified scooters, yellow is a good all-around street choice, and red gives the hardest launches on a built race setup. If your scooter bogs from a stop, go stiffer. If it slips or revs too high before moving, go softer.