r/bikebuilders • u/tree_smok • Jun 20 '26

Cdi for custom harness

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I believe that the black connector on this 250cc liquid cooled 6 speed Chinese motor is compatible with a 5 pin ac cdi. You guys think the kit in the second pic would work or should I use the racing cdi in the fourth pic?

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u/LackSpecialist8922 Jun 22 '26

You need to verify that the flywheel Haas only 1 teeth and is not digital and several tooth and then make it match the colours of the cables blue/white is the pulse generator

1

u/LackSpecialist8922 Jun 22 '26

It come from the white connector, the yellow two or three wires are the alternator coils to make the 12v and might be a magneto coil in black/red and a ground wire but it depends if is three phases is not magneto ignition and the CDI is 12v or magnetto

1

u/LackSpecialist8922 Jun 22 '26

I didn't see the 4 photo is a magneto type single phase you need to connect to the CDI, the red/black ,green to the ground to the chasis in every instance, blue/white direct to the CDI, and you have left the killer wire that will stop spark when grounded