1. After the CDI is powered on, the digital display shows the ignition curve selected before the last shutdown. 2. Pressing the button cycles through ignition curves 0–9. Curve 0 disables ignition (speed-limited to 6000 rpm). Curve 1 represents the stock ignition timing. Curves 1–9 offer adjustable ignition timing with no speed limit. After installation, select the optimal curve for your motorcycle engine. 3. The selected ignition curve is saved in memory and remains displayed after power-off. 4. Ignition curve 1 provides a relatively conservative ignition timing, while curve 9 provides more advanced timing. Each step between curves adjusts timing by approximately 1–2 degrees. 5. Select the appropriate ignition curve based on riding conditions, terrain, and performance requirements. Type: Motorcycle Digital Ignition Adjustable CDI Box Condition: New Features: 9-segment digital display, adjustable CDI, 4-pin connector Fitment: Compatible with 50cc, 70cc, 90cc, 110cc, 125cc, 140cc, 150cc, and 160cc ATVs, quads, pit bikes, dirt bikes, and motorcycles Color: Blue & Black Material: Metal + Plastic Package Contents: 1 × Motorcycle Ignition DC CDI Box Note: Color may vary slightly due to lighting and screen settings. Dimensions may vary by ±1–3 cm.