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Post by crawdaddy on Nov 20, 2015 9:45:18 GMT -5
No change with all that unplugged. Still getting around 40 ac volts on the black/red wire into the cdi with the plug unplugged and it drops to a volt or 2 ac with the plug plugged in. Yesterday it was around 50vac and .7vac. I don't know why the voltages would change but the problem still remains.
side question - shouldn't removing the black/white wire from the cdi plug serve the same purpose of removing the switches and safety items from the system?
I'm at a loss. I don't know how a stator could fail like that but that is about all that is left......??
I wish I had another harness or another scooter around. What is sad is that a couple months ago I had this scooter's twin as a parts bike for another guy, finished his project and he sold that one for parts.
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Post by crawdaddy on Nov 18, 2015 20:21:22 GMT -5
Well, the new cdi came in today.....still no spark. I'm not a parts swapper but dang..... Just an update... I will start over tomorrow but again wanted any ideas...black/white wire unplugged so far as I know the 'stop' circuit should be disabled. Ignition has to be the problem. Weak stator? Does anyone have the pinouts for the start / kill switch for this scoot? I find generic diagrams but want to know things are plugged in right and the switches are doing what they are supposed to do.
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New Rider
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Joined: Nov 14, 2015 10:41:58 GMT -5
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Post by crawdaddy on Nov 14, 2015 12:14:56 GMT -5
Thanks much. This is on a brand new cdi and the 'old' cdi was only about 3 months old or so (I know because I replaced it for him). That is not to say they both aren't bad but I'm still leaning toward wiring. Strange that it would start one day but not even fire the next. I just ran out and took some ohm readings if this sheds any light-
with the cdi completely unplugged I'm getting 4mOhm on the green (ground) wire. 15kOhm on the blk/yl wire (to coil) 14kOhm on the red/white wire (trigger) and 59kOhm on the blk/red (ac power). All of them are showing continuity to ground - that doesn't seem right. When I unplug the blue wire and the black/red wire at the bullet connectors and ohm the wires to ground (forward towards the harness, not backwards towards the stator) the meter will never settle on a number but jumps from around .8 to .2 to 1. mOhm. I'm going to start pulling all the plastic off the front to check for a short but thought I would throw those numbers out there to see if anyone can help me narrow this down.
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New Rider
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Joined: Nov 14, 2015 10:41:58 GMT -5
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Post by crawdaddy on Nov 14, 2015 11:00:18 GMT -5
Hi everyone,
2008 Roketa MC-68A-150
The short story is: I have no spark. Going through testing I found I am getting around 50volts ac from the stator to the cdi on the black/red wire with the connection unplugged from the cdi box while cranking. When I plug the connector into the cdi that ac voltage drops to .8 while cranking. What would cause this?
The long story is: I have worked on this scooter for this guy a couple times. He brought it to me because it wouldn't turn over, or turn over fast enough or sometimes at all. I replaced the starter, started it up 3 times and it started fine. I pushed it to another spot and called him to come get it. He came the next morning and it wouldn't start. Here starts the no spark condition. I tested the stator unplugged at the bullet connectors and as above, on the black/red wire I get around 45-50 ac volts while cranking. I get .2 volts ac on the blue trigger wire. I have the black/white wire disconnected from the cdi connection. I'm sure I have some ohm results around here somewhere but wanted to get this topic started. I'll be glad to test whatever is required.
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