Hi everyone,

So some great news. I got the bike running!  

https://youtu.be/92iLiky_ejs

In the end I found the problem to be the cheap aftermarket ignition coils that you can buy on eBay. These have a primary coil resistance of 1 to 1.5 ohms and they WILL BURN YOUR TRANSISTOR!!! (These are listed as suitable replacements for Suzuki LS650)

I managed to purchase a good condition used OEM suzuki ignition coil on eBay and it has a primary resistance of 4.5 ohms

I also soldered on a new D1071 transistor on the board, I then started the bike and it fired up within 1 second. Brilliant.

As mentioned earlier in the thread,

12v @ 4.5ohms = 2.6 Amps
12v @ 1 ohm = 12 Amps

The rating of the transistor in the black TCI module is 6amps. So it is quite clear to see that an ignition coil with low resistance will damage your transistor.

I hope this thread is able to help someone else out in the future as I know lots of people have trouble with these TCI boxes.

The moral of the story is. Check your primary coil resistance and only use a Suzuki OEM ignition coil!!

Cheers everyone,

Tom

Hi everybody, I am new to this forum.  A few questions about M-Unit ignition wiring I was hoping someone could help me out with.  

Does anyone know the wire position for each wire into the CDI on a 2002? How do you incorporate the M-Unit into the CDI? Does anyone know where I can find an after market waterproof 8-pin female cap for the CDI?  Does the system need a 5 pole relay like recommended on Revival Cycles?

Any general information on wiring the M-Unit to the CDI would be helpful.  

Thanks!

That link is broken.  Thanks-

Hello,
I see it’s an old thread but maybe someone will help me.
I’m looking for electrolytic capacitor voltage and uF, because mine is blown all black can’t see anything, marked it in photo. And if anyone can measure resistor size which is under heatsink, I assume it’s should be around 2k, mine shows 28oms



Ok if some day anyone needs info about blown parts, I used:
Transistor tip152
Capacitor (that one marked in red) 2.2u 50v
And resistor (which drives transistor) 820R

Seams to work fine