'81 GS550T ignition replica for a few euro !

thanks Chancho196, but I think this is the meaning of this site
exchange of information helping each other






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[Chancho196]

Cracking thread! It's so cool when someone gives their hard-earned knowledge for free. Thanks Kokar, this could come in useful in the future!

i have used BU941ZPFI from digikey for my 1985 450l igniter box (i had to mount the larger case styles on the outside of the igniter box ) and the higher current transistors worked well as coil drivers

it can be done, but we need to make a new PCB for FET drivers IR4427 .

Very interesting! Have you got it running with the FETs? Tell us more!

I'm also interested! I've got a bad NPN Transistor on my board, and a handful of FETs kicking around. I'm thinking I'll replace the pair with FETs instead of waiting a month for the correct transistor to be shipped in from china if you got yours working.

I think that my ignition feed on your bike, I think the only difference my be the colors of your wires and the connector

the wiring diagram of your bike is the following

Noob Questions

I have a failed igniter box on my 1980 GS450L. I am considering building one based on your design. I am very mechanically able, but a bit nooby with electronics. I think I could pull it off, but I need a bit more information. I understand that "R" components are resistors, and "C" components are capacitors, but what are the other parts? The photo I got off the thread of the PC board is too small for me to read all the component numbers, and it looks like some of the parts aren't numbered; could you clarify and post a larger picture?

Sorry for being a simpleton, but I would like to see if I could get enough info to build one with my somewhat limited knowledge.

G

if you want I can send to you the negative film of my PCB for free




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the PCB is 7cm X 5cm

Thanks. I'm going to be printing a few of these as a test. I appriciate all the hard work you have put in.

the PCB is 7cm X 5cm

Sorry, I'm Looking for the dimesions of this board. Could anyone who has one of these let me know?

these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK

Very interesting! Have you got it running with the FETs? Tell us more!

[tom203]

these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK

So, are these n-channel (mos)fet's ?

these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK

I think this was only a DIY thread on how to build your own.

1000% correctly !