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Ships within 48 hours · Estimated delivery Sep 6 - Sep 11
SKU: 1200-1153
Inner Diameter: 54
Designed specifically for the GY6 139QMB engine platform
OEM belt fits the following models: Kymco ZX50
Thread Diameter: M8 (8mm)
NCY Ball-Bearing Secondary Spring Seat | GY6 & QMK 125-170cc stators SKU: 1200-1153The NCY ball bearing secondary spring seat eliminates CVT spring twist and binding on GY6 125 150 170cc engines. In a stock setup, the torque spring must twist as it compresses, creating internal friction that slows downshifts and reduces belt life. This NCY upgrade uses an integrated ball bearing assembly that allows the spring to rotate freely during compression and decompression, resulting in faster, more consistent CVT response. Zinc plated steel
