Category Archives: AC-CDI


Features AC-CDI For ONE or TWO* cylinders For and for * On 4stk engines with 1 pickup on the crankshaft, one spark occur at compression stroke and one at exhaust stroke. Firing in the exhaust stroke is a wasted spark. Hence the name… Microprocessor control unit Wireless and easy programming and the fly via smartphone or laptop Compatible Android, Iphone, .

AC-CDI 16F628 v7.9

Sept.2018: New software upgrade v79.r14 CHARACTERISTICS. Adaptable to other single-cylinder bikes. Precision (0.5 to 1.5 degree). Software source unavailable (only .HEX). Advance curve is in EEPROM and can be freely modify Need a working charging coil/magneto for the capacitor. Need a battery DOWNLOAD PIC 16F628A 600 to 30000rpm Make the PCB: PCB Eagle v6 files Build the CDI: Schematic Partlist Draw the advance curve: Excel file Burn the PIC: .


v2.2 Characteristics. Easy to build. or ready to use in the SHOP. Advance curve slightly adjustable. Need a working charging coil for the capacitor. Don’t need a battery No rev-limiter DOWNLOAD AC-CDI Analog v2.2 To make the PCB PCB.pdf Parts list To build the CDI Schematic.pdf components.jpg To wire the CDI wiring.gif HowTo hock this CDI on Yamaha XT600 Printed Circuit Boards and Ready to use CDI are available .

AC-CDI 16F628 v6.7

This version is discontinued. Consider to build v7 instead! Characteristics. Adaptable to other single-cylinder bikes. High precision (0.07 degree). Preprogrammed for XT400/550/2strokes (84 or 106 points). Software source unavailable (only .HEX). Need a working charging coil for the capacitor. Need a battery DOWNLOAD PIC 16F628A v6.7   1500 to 40000rpm To make the PCB PCB Eagle v6 files To build the CDI Schematic Partlist To burn the PIC Softwares .

AC-CDI Honda XR400

ADAPTATION to fit a Honda XR250 / XR400R Done by   Characteristics Based on AC-CDI PIC16f84 v5.4 For single. 1 advance curve. No kickback.   Introduction Andrew has build a AC-CDI for his 2002 XR400R. Mains changes are: – He use a 2.2uf 380v capacitor, and the same configuration of the rectifier diodes he saw into the original cdi. – No battery is used and the cdi is directly .