25. I am tired. I want , just, to ride my bike

Hello,
Because i come to an end (relatively) i want to share more from my experience. First of all, for those who want to create their own EFI, it is not a simple job to do. You need to know , at least, the base of electronics, mechanics, programming controllers and computers. You have to be organized , self motivated and your own teacher. You can find all the information you need on the internet. Also you need 500$ and time.

I want to take a break because i am a little bit tired of this. I come to a point when i have to test the bike each day with different settings. I managed to start the engine when it is cold but because i do not have an O2 sensor it is hard to see if the bike runs lean or reach. I can ride it, but sometimes the engine stops because the mixture it is to reach or to lean (depending of rpm, battery voltage, pressure etc...).For example i've been trying to start my bike for 2 days with different settings for mixture and the problem was the spark plug - brand new spark plugs .... so, i have to replace the spark plugs and start over from the beginning (with the settings).

For those who want to try some schematics i want to share some of my work.

Stable +5V and +12V:

Pickup the Variable Reluctance Sensor signal. All the values are tested and works with the VR Sensors from Suzuki GS500 (1991).

How to send the signal to the injectors:

How to control the sparks with the PIC!

24. The first Suzuki GS500 E - EFI (electronic fuel injection)

Hello, I am very happy to write this post. Finally i can ride my motorcycle.

23. Version 2.1 almost done

This picture was removed by a ugly bug from picasa!

22. Version 2.1 = Version2 simplified

21. Going fast to "Home made EFI Version 2.1"

I need to fix some bugs:

1. keep the schematics simple
1.1. remove the ignition management module because it is very complicate to make all the things work and it is more simple to figure out where are the problems.
1.2. remove the stepper motor controller module (because i use a servo motor instead)
1.3. remove any other unused module (relays, leds, connectors, etc...)

2. isolate or change the metallic box because the rain it is a problem

3. replace all the connectors and solder the wires on the pcb to avoid any problem with connectors.

4. increase the clock tick interrupt from 1/4us to 1/8us (or 1/16us)

In the following pictures you can spot some issues. The rain cause a short circuit and the pcb was damaged in some points.

The three places where the pcb was damaged in the version2:

The "salt like" substance from the rain:

20. "Home made EFI Version 2" schematics

19. EFI it is working

The engine starts not very easy. Now the problems are:
1. the adjustments for the injector time table
2. the problems with the rain!
3. the big problem it is the lack of time!

18. Almost done

Hello , i do not have much time, so take a look to the pictures.

17. Project suspended two months!

Hello guys! Unfortunately I must suspend the project for two months. I will start working on 11 June, when I will come back from Vietnam. The company that i work for send me to Vietnam as a trainer.
Here is full of scooters. Suzuki GS500 it is a big bike for this country! For those who wants to see more about my experience in Vietnam visit this: