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Ships within 48 hours · Estimated delivery Sep 6 - Sep 11
Professional installation and belt inspection are recommended when changing weights
Bench seat for two passengers fits all smallframes and comes with seat lock and keys
This master set includes 12 weight sets ranging from 6g to 17g — 36 rollers total — so you can test multiple configurations to find the perfect balance of acceleration and top speed for your riding style and engine setup
Most 139QMB engine cases require machining or cutting to fit the larger cylinder skirt
What’s Inside the Kit
NIU XQi3 Rear Brake Assembly Polini Belt Professional installation and belt inspectionRestore full rear braking performance on your NIU XQi3 with this genuine OEM rear brake assembly. This is the complete factory unit caliper, bracket, and hardware ensuring a direct bolt on replacement with no modifications required. Engineered to the same spec as the original for consistent, reliable stopping power on both the XQi3 Wild and Street variants. Genuine OEM NIU replacement complete rear brake assembly Includes caliper, mounting bracket,