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Makotosun

Vape connection 75 DT400

  • adguy2112
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Vape connection 75 DT400 was created by adguy2112

Hi all, recently bought a vape system for my 75 DT400. Flywheel/stator is in and timed and Im getting spark but I can’t figure out how to patch into the lighting system. Here is what I have so far.
new coil yellow, brown and red to stator, blue to blk/wht in harness
regulator red to battery positive, brown to batt negative, base to ground, two black to stator
rectifier red and wht jumped
harness under oil tank wht and yellow/wht jumped
originsl CDI disconnected. Includes brown, wht/red, blk. Wht/grn, org, blk, blk/wht
orig regulator wht/yel disconnected

bike runs but no lights and I don’t know how to patch in. Could really use some advice. 
Last edit: 18 Apr 2026 13:49 by adguy2112.
18 Apr 2026 13:48 #1

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Replied by pabdt on topic Vape connection 75 DT400

R=regulated 12V by VAPE

R->G/R ; (CHARGE- LIGHT SW ON) Sends power to WHITE -> RECTIFIER -> Fuse -> Battery
R->G/W: (CHARGE- LIGHT SW OFF)sends power to WHITE -> RECTIFIER -> Fuse -> Battery
R->Y: (POWER FOR HEADLIGHT/GAUGES) sends power to Y headlight circuit (dimmer sw).
Brown -> Ground
Blue -> Blk/White; test this circuit before start up!

I currently have the original rectifier in mine. Like a free switch to cut voltage in reverse. I tested jumped and works both ways.
________________________________________________
1969 Yamaha CT1 175
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
Last edit: 18 Apr 2026 22:22 by pabdt.
18 Apr 2026 22:21 #2

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