How to modify the Original CDI Using SparkKing System

前言：這一篇文章是一個簡單的流程說明，主要是搭配影片說明。

This article will explain how to use SparkKing CDI System , to replace the original CDI system

on a Suzuki AN125 motorcycle.

The followed are the basic specifications about Suzuki AN-125


Displacement: 124 cc
Engine type: Single cylinder (single overhead cam – SOHC), 4 stroke, air cooled, automatic
Bore and stroke: 52mm x 58.6mm
Lubrication: Wet sump
Oil filter: Filtrex OIF011, Hiflo HF131, Champion X327
Clutch: Variator type clutch
Gearbox: Automatic
Gearbox oil: From engine (doesn’t need a separate gearbox oil)
Power: 10.2 bhp (UK model)
Torque: 10 nm
0-60 mph time: 15.9 seconds

Electric stuff

Ignition type: Electric CDI
Starter: Electric start and kick start
Electrical system voltage: 12 volts
Spark plug (AN125 S – Feb 1995 to Dec 1995): NGK CR8E
Spark plug (AN125 T/V/W – Jan 1996 to Oct 1998): NGK CR7E
Spark plug (AN125 X – Nov 1998 to Nov 2000): NGK CR8E
Battery: AN125 battery – YTX7A-BS / CTX7A-BS

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Step 1: Remove the Front cover 

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Step 2: Find out the location of original CDI 

The connector are 2 wire(B/R and B/Y) + 4 wire (Br, W, B/W and W/Bl).

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Step 3 : search the wiring diagram from Google :

we know the original CDI is AC-CDI. 

The wire B/R  is the AC power source of CDI from magneto. this wire we don't need

for ours SparkKing CDI (DC-CDI) .

The wire B/Y is the turn-off switch of AC-CDI. we don't need, too.

The Br and W are the pick-up signal from magneto. where W is wired to ground. 

--- you can find out the W is wired to ground using multimeter. 

The B/W is wired to Ground, ie the negative of Battery.

The W/Bl is wired to the ignition coil.

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Step 4 : Make a Y-Wire in order to measure the ignition timing on original CDI.

We need the pick-up and ignition coil signal to connect to ours SparkLink+.

The Y-wire is to intercept the pick-up signal easily.

Make a wire to acquire the ignition timing.

The Box is the SparkLink+ Tool. 

Now you can execute the SparkKing App Software on the PC. and start the engine ...

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We can acquire the main ignition timing on the original CDI easily.

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Step 5 : Replace the Original CDI Using the SparkKing CDI System.

Make a customize wire to match the original connector. where Y wire is the DC-Power from the positive of Battery. You can wire to any switched power line on vehicle.    

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Step 6 : Now you can change the ignition timing chart of SparkKing CDI to match the original CDI Ignition timing.

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Step 7 : Start the engine... and success !!

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We have also GY-6 Engine did same thing on. 

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DC-CDI advantage is that you can get more stable power supply from Battery. Relatively easy to start-up engine, and stable on the idle speed of engine.

Similarly, in the entire engine speed range, can also be obtained relatively more stable power supply.  

And we can also understand :In the conversion process, the magneto specifications will not affect the DC-CDI installation.

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SparkKing – Programmable and Powerful CDI solution

Overview

     The SparkKing CDI(Capacitor Discharge Ignition) provides a high-performance, programmable motorcycle engine ignition system. SparKing allows you to quickly set the spark advance angle based on the specific RPM.  By the repeated modify and tuning the spark advance angle, SparkKing may being suitable easily in any small (motorcycle) engine’s ignition system. Ultimately, it will speed up users’ tuning the spark timing process for any modified engine dramatically in a much efficient manner.

        SparkKing uses a high-performance, high-integration Micro-controller which provides a fast and stable operation and signal processing facility. And, the SparkLink toolkits cable which leveraging USB connection and plug-and-play driver, a naive user can easily check and diagnose the spark advance angle table in the SparkKing CDI. This allows engine engineers to focus on tuning and diagnostic their ignition system. At the same time, SparkKing may also enhance the productive efficiency of CDI, reduces the product inventory risk.

Key Features

◆      Protection circuit for power source.

◆      Embedded DC-DC Converter circuit, Support DC Type CDI (Capacitor Discharge ignition) system.

◆      Checking and Diagnostics Interface.

◆      Programmable spark advance angle table.

◆      Flexible Engine Reference signal configuration.

◆      Up to 15600 rpm supported.

◆      Maximum 60 degree spark advance angle supported

◆      Enhance One Shot Engine kick-start procedure

◆      Compatible for traditional DC-CDI function.

Basic Specifications

◆  Name : DIGITAL DC-CDI.

◆  Functions :

* SCR switching type.

* Capacitor charging type : DC converter type

* Discharging Mode : AC-ARC

* Ignition control : Map change control by RPM

* Regulated voltage 25V MAX.

◆  Applicable Revolution : 230 ~ 15600 rpm

◆  Operation Temperature : -10~+60ﾟC

◆  Storage Temperature : -20~+80ﾟC

◆  Power source : 13.0V

◆  Condenser Capacity(For Ignition) : 1.5μF

◆      Compatible for traditional DC-CDI function.

The connection diagram is shown as followed :