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Post by magoconnor on Oct 25, 2018 8:10:30 GMT -5
Hello. So Im doing a complete overhaul on my scooter. As of now I cant find a cdi box that works for my kymco super 8 4t. So I have tried 2 naraku unlimited cdi's for my kymco super 8 4t. but none seems to work. The bike fires up alright and can idle, but it cant go more than 10kmh! I dont know whats wrong with them.. they start to mis-fire and its impossible to go any faster. Now I would like to convert this scooter to ac instead of dc. I have done it before, last time I just bought a new magneto coil and a new 8 poll fly-wheel. And of cause a ac fired cdi box. The problem with super 8 4t is that the cdi box also controls the choke and the lights. Can anybody tell what I should do with those wires? And possibly how to re-wire them? Also do I need a new rectifier? Here is a link to all the wiring: scootergrisen.dk/scooterhjemmeside/download/kymco_super8_4t_servicemanual.pdfOn page 55 you can see the wiring from the cdi to the automatic choke. On page 161 is the general wiring of cdi showed. I really hope you guys can help me out! Cheers Mag. |
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Post by dexameth on Oct 25, 2018 8:52:14 GMT -5
Maybe run the auto enricher from the rectifier's output to the battery, but you'll likely have to put a diode between the connection to the battery and where you splice the auto enricher to. This way you won't draw constant from the battery and the auto enricher will get the juice once started. Never done it, just an idea... As for the lights, I would keep them DC. I hard-wired mine into the key ignition's "hot" wire so when the key is on, the lights are on. If you wanted them AC, you'd have to steal current from the charging system. We sell the stock CDI with the rev limiter removed, found here. Maybe try this one, and keep everything "normal"? |
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Post by magoconnor on Oct 25, 2018 9:10:52 GMT -5
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Post by dexameth on Oct 25, 2018 9:29:19 GMT -5
Ahh, it's the 8 pin. We don't carry that one yet, but it can be found here. I found a couple other models, but they were out of stock. |
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Post by magoconnor on Oct 25, 2018 11:38:19 GMT -5
Do you think its possible to hook up the auto enricher to the key ignition?
Maybe run it with the lights like you suggested.
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Post by dexameth on Oct 25, 2018 12:48:34 GMT -5
It would be possible, but the issue would be the moment you turn your key is the moment the wax will start heating and expanding the enricher and it may close it off too early.
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Post by magoconnor on Oct 25, 2018 13:03:23 GMT -5
Okay I see.. So I just place a switch between the two.
What about the rectifier do I need to change that?
Im not sure, but I dont think is has anything to do with the cdi.
at least not a ac fired cdi. But then again I could be wrong.
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Post by dexameth on Oct 25, 2018 13:23:33 GMT -5
So you won't have to do anything to the regulator/rectifier. The wire harness connecting to the stator should have the same yellow/white/green wires which are the charging system wires. The new stator will have a red/black wire that will be the exciter coil and the blue being the trigger, these will have to be wired into the CDI as well as the kill switch, a ground, and the coil output.
I wouldn't do a switch between the ignition and enricher, just don't leave the key on and walk away for 30 seconds. Remember to fire up as soon as the key turns, or within say 5 seconds.
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Post by magoconnor on Oct 25, 2018 13:31:38 GMT -5
Sounds great man. Thanks alot for your time and help  |
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Post by tocoo on Oct 26, 2018 3:01:31 GMT -5
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Post by magoconnor on Oct 26, 2018 7:55:34 GMT -5
Hi tocoo. I have done a fair amount of research and tried two naraku cdi's for the kymco super 8 4 stroke. I know from asking around that the two stroke version wont be compatible, but thanks for the suggestion. I have derestricted the stock unit somewhat. When removing one of the pink wires the rpm limit is moved from 7500 to 8800 rpm. But here is the problem the bike is not fully de-restricted, and tho I dont have plans to be pushing 9000 rpm all the time. The stock ecu starts to retard the timing well before 9000 rpm, so thats a no go for me. Here the first video shows the stock cdi with the wire cut: www.youtube.com/watch?v=9ev8ChCLy28In the second video he has install a after market cdi (completly destricted) www.youtube.com/watch?v=r8HMz6dYAFYThe easiest think would be if the damn dc cdi box worked... But it dosen't so Im switching to ac where there is a ton of boxes availble. |
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