2nd BBK install, need help  By  brandjur (Read 4,248 times)

All proves my point, the theory of how many wires on each plug tells you what>>>>>>>> it is? The sensor more than likely went to the AC feed loop.

The CDI controls when the spark plug fires. A restricted CDI simply stops firing once a pre-set engine rpm is reached. Without spark, the engine slows to below the "rev limit" and the CDI resumes providing current. An unrestricted CDI does not stop providing current no matter how high the engine rpms go. You are only limited by the engine itself.

On some scooters there is a sensor fitted to the variator cover that detects the rpm of the engine. Once the revs reach a certain limit, the CDI unit cuts down the spark, reducing power. Sometimes rather than buying a new CDI, cut the wires from this sensor and see if it does the trick, if not then bypass the sensor and go directly from the stator to the CDI.


Also the reason the DC CDI is larger is because it contains a DC to AC transformer.

Also the Jonway YY50QT30 comes with the choice of 2 or 4 stroke, which is yours? BTW in case any don't know YOU CAN NOT use a 2-stroke CDI on a 4-stroke engine, reason is the timing is different.

The Baja sc50 is a 4-stroke.

www.bajamotorsports.com/system/documents/63_OWNERS_MANUAL_-_SC50_-_Sun_City_50cc_Scooter_Owners_Manual_VIN_prefix_LAWA_.pdf


Also it's common for suppliers to tell you their performance CDI is plug and play and will work on all Scooters, all a bunch of hogwash.

Here is the 5-pin AC type CDI with a totally different plug set up:



Common 6-pin AC type CDI:



Take note of the two grounds I mentioned. Again one has to see what they have by checking it and then there is no doubt.

JR

JR,

Please relax. After doing a lot of research, I have run into a situation and that is why I sought help from this message board.

This is my "saga" as I am dealing with my scooter issues. It isn't over for me and I was merely asking for any guidance, help, or experience from others. One reason I am concerned is that if ever my original CDI quits, then it won't start with a replacement CDI. I am just trying to figure it out. If it helps someone else out in the future, at least it will be archived.

I do know the other factory CDI is working as it worked on the other scooter. However, it does not work on mine. All the CDIs are for 4t.

I will go to Jeremy Hall at Enviromoto and ask him about the CDI wiring pins/colors. Last time I emailed him he was very defensive of his non-return policy. He also tried to lead me down a road of believing I was wrong in thinking it was an AC CDI. That lead me to waste more money and purchase a DC unit.

Thank you for your help, but please, let's keep this light. One of the reasons why my initial post was long is to reassure that I was trying to be thorough with my homework and my wrenching.

[replyingto=brandjur]brandjur[/replyingto]I'm as relaxed as one can get, at my age it pays to be that way. As far as the saga to me you indicated that your saga was not understanding the CDI as far as how it works and what you have.

Now after reviewing what you have and what you're trying to replace it with it's all clear. Here's yours:

2009 MC-17 50cc

Simple 6-pin Chinese CDI and if you're worried about it quitting then here is one that will work I assure you:


www.ebay.com/itm/Scooter-CDI-Box-GY6-150cc-50cc-Chinese-Gy6-Moped-ATV-/280689146867?pt=Motorcycles_Parts_Accessories&hash=item415a607bf3&vxp=mtr

Cheap price to have a spare and CDI's really don't go out that often.

Here's a cheapo on the Performance one too:

www.ebay.com/itm/Bike-ATV-Scooter-Moped-GY6-High-Performance-Racing-CDI-Box-Unit-Dirt-50cc-150cc-/310654441070?pt=Motors_ATV_Parts_Accessories&hash=item485472966e&vxp=mtr

I'm sure Jeremy isn't going to take his back so if it doesn't work then a lesson learned and that's about all one can say, sorry it ended up that way.

2012 Peace scooter 50cc TPGS-811

Betting money even though it may plug in the pins are different most are on Peace scooters.

JR