ROLL YOUR OWN CDI 2 : is it feesable?

Wevil Kenevil

Well-Known Member
After dissecting a few stock cdi's and a catnip stand alone CDI and spark coil and finding they had sub par components... I had enough of that game!

When I read AI all of the components that were on the bread board it actually told me that I was wrong about the BT 151 chip because the chip that was on there was way underrated and AI said it would probably blow up in just a very short amount of time. Which it did... It also suggested upgrading the diodes for component protection.


Specifically the bt151 chip ( high to mid range voltage) which should have been used, I found in place a 2p4m(?) a low voltage unit.

I bought all the capacitors resistors diodes ect. In groups of 25 for @ 7 bucks a piece except the bt 151 chips. I paid 10 for 10 of them. For about a $40 total. Which you can do cheaper buying just one of each for about 18$.

And though roughly the same price as you would find for one online this one will last you so much longer AI said that it should last the life of the bike

The breadboard, Which I made from copper shielding tape and old breadboard. I just cut the shapes of the connection points out of the copper tape and then use the adhesive on them to stick them to the breadboard. And then drilled my holes for my components.and soldered them on. To avoid short circuit sand all of the old Trace leads off.

As for the housing, I am using a small water tight electrical project box I already had. 2 bucks on line.

And it's worth noting that you should upgrade the diodes for extra blow back protection.
 
Good luck, I built a couple back when rohmell did the first thread. I used a large pill bottle for my components and a MC coil from Amazon, one ran great at high end but lagged at low end, once I got one to work I lost interest and move on to something else. Mine looked like Frankenstein built it.
 
Good luck, I built a couple back when rohmell did the first thread. I used a large pill bottle for my components and a MC coil from Amazon, one ran great at high end but lagged at low end, once I got one to work I lost interest and move on to something else. Mine looked like Frankenstein built it.
Luckily I have some small project boxes left over from when I was building gps vehicle trackers...they are more than what I said in my o,p, they are like 6 bucks now... but if it works roll with it!
 
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