Rolon Brass Chain & Sprocket Kit for KTM Duke 125 — Kit HPORC 373NF

The Duke 125 punches above its displacement, and its drivetrain deserves hardware that doesn't hold that character back. The Rolon HPORC 373NF is a brass-plated kit built specifically for the Duke 125 (and shared with the RC 125, which runs the same platform), giving you genuine OE-matched fitment with a finish that suits KTM's aggressive styling far better than plain steel.

The front sprocket uses a 1-tap-plus-spline mount for a precise, secure fit, precision-machined for smooth, quiet operation and higher transmission accuracy. The rear sprocket is heat-treated and hand-finished, mounted on a 6-hole pattern for accurate positioning. Both are built with anti-wear coating to keep power delivery clean, and every sprocket passes 18 production stages and 15 individual quality checks before it ships. Brass-plated inner and outer chain link plates add real corrosion resistance on top, plus the lustrous finish that makes an upgrade actually look like one.

In the box: front sprocket, rear sprocket, and brass-plated chain — a complete drivetrain replacement, machined to OE position accuracy for precise fitment.

Keeping it running well: lubricate every 500km for seal-ring chains (1000km for standard), clean every 2500–3000km with a nylon brush — never a steel wire brush or high-pressure jet directly on a seal-ring chain — and maintain at least 1 inch of chain slack. Replace chain dampers at the same time as the kit. Professional installation recommended.

Key details

• Brand: Rolon (manufactured by LGB — Indian chain manufacturer since 1937)
• Fits: KTM Duke 125
• Kit code: HPORC 373NF
• Front sprocket: 14 teeth (model SR 02 249), 1-tap + spline mount
• Rear sprocket: 45 teeth (model S 02 661), 6-hole
• Chain: 112 links, brass-plated inner and outer link plates (R520HPORC-112-2)
• Quality control: 18 production stages, 15 individual QC checks per sprocket
• Fitment: as per OE specification