Author Topic: Help with a moddification  (Read 251 times)

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Offline SonOfAnarchy ZA

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Help with a moddification
« on: May 09, 2017, 11:00:37 AM »
Right I'm not sure what to do here I have a Jet board with a 330cc 45HP 2 stroke motor seems the CDI has failed so I would like to modify another CDI in as you can no longer get parts for this motor. I can wire up a car ECU but when it comes to this I've never dealt with this kind of a system, So....

the original stator has 2 yellow wires and the pickup wire. I'm not sure what CDI it had in or if it had a regulator as all that was enclosed in an epoxy cement type rubbish.

I am assuming this system is an AC system but I'm not sure what to wire where or even where to start. I was thinking of just buying a new gy6 stator CDI and regulator and wiring that in but not sure if a 4 stroke and 2 stroke CDI are different. Or if I could buy an AC CDI and wire that into the original stator but not so sure about the wiring :giveup:

Any Ideas or advice would be appreciated!

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Offline Trek8

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Re: Help with a moddification
« Reply #1 on: May 10, 2017, 04:01:54 PM »
Thats a niiiice piece of kit - now why can't they pop that motor into a scoot.
(Regret cant help with your question)
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Offline Skaap

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Re: Help with a moddification
« Reply #2 on: May 11, 2017, 02:43:51 PM »
the CDI tells the ignition when to spark.

you will have to get a CDI matching the characteristics of the current one you have.

it works like a cars mapping.

im not to familiar with the inns and outs of CDI's.

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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #3 on: July 12, 2017, 12:49:02 PM »
HI there

A 2 stroke cdi fires everytime at piston top dead centre, a 4 stroke cdi fires at every second time at piston top dead centre. It's a fairly simple device. If you tale it to an electronics guy they should be able to replace the capacitor with a similar uf (micro farrahd) unit. That is normally what fails. All the capacitor does is charge and discharge. Basically a battery but doesn't store energy.
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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #4 on: July 12, 2017, 12:58:21 PM »
If you are certain it is the CDI. There are guys that can make you a new one as per the spec too. If it is the rectifier , it is more than likely a semiconductor diode or 2 that need replacing on the existing board.
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Offline SonOfAnarchy ZA

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Re: Help with a moddification
« Reply #5 on: July 12, 2017, 01:52:36 PM »
if i could just get a wiring diagram for a 2 wire stator with cdi that would help then i could find something that could work for my application
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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #6 on: July 12, 2017, 02:11:53 PM »
Basic ignition wiring attached. Principle is standard.
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Offline SonOfAnarchy ZA

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Re: Help with a moddification
« Reply #7 on: July 12, 2017, 02:14:48 PM »
thats great thank how will i know which wire is for which as the both yellow and equal thickness
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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #8 on: July 12, 2017, 02:37:57 PM »
Do you have a multimeter with ohm and continuity function?
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Offline SonOfAnarchy ZA

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Re: Help with a moddification
« Reply #9 on: July 12, 2017, 02:41:30 PM »
yes i do
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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #10 on: July 12, 2017, 06:52:27 PM »
1."Red" cable coming put of CDI needs to be skinned or cut in half to allow for testing.
2. Will need to test for continuity from red/black out of magneto to red. This should ring out if all components in working order thus identifying which is which. If no joy either the diode or capacitor is gone.
3. As  a failsafe do the same test on the other blue yellow magneto cable. It shouldn't give the same result as the diode should block the flow.


 
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Offline SonOfAnarchy ZA

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Re: Help with a moddification
« Reply #11 on: July 13, 2017, 07:39:04 AM »
magneto has only 2 yellow wires and a blue for the pickup the rest I can't see or get to as they are encapsulated in cement epoxy stuff
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Offline Carbon tyreprint

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Re: Help with a moddification
« Reply #12 on: July 13, 2017, 08:45:26 AM »
I don't know how to advise you further then. Maybe take it to an auto electrician to trouble shoot then. There are other ways but will require a megger or oscilloscope to do so.
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Offline SonOfAnarchy ZA

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Re: Help with a moddification
« Reply #13 on: July 13, 2017, 09:29:41 AM »
ok kwl thanks for you help
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