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Post by terryspa on Apr 13, 2016 15:47:26 GMT -6
I have a problem with my 2007 JCL 250 (263cc). The problem is that it will start but as soon as I try to give it any gas, it starts bucking, missing, then die. Last Fall it stopped charging. It was running OK but just wouldn't charge. I just put it away for the Winter. This Spring it started OK. I road it around the yard and put it in my garage. I tested the stator and had no output. Also the blocking diode was open. So I replaced the stator, voltage regulator, and replaced the diode with a relay (as suggested here, Thank you). Now I have charging voltage, 15 volts at idol but as soon as I try to give it gas, it will die. I thought maybe there was a problem with the pick up on the new stator assembly so I took it back apart and put the original pick up sensor from the old stator. Same problem. I put in fresh gas, but as I said earlier, it ran ok before I changed the stator. I also tried putting the old voltage regulator back in but the same problem. One thing about the new stator, when I went to mount it the three mounting holes were not located so that I could mount it as the old one. The clip holding the yellow wires was not aligned with the cutout in the case where the wires would normally go. I removed the clip holding the wires so I could rotate the stator to line up the holes. There was no wat to line up the three holes unless the wires were 180 degrees from where they should be. I think it was built backwards. In any case, i mounted it with only two screws and rotated a few degrees from what would be the normal position. Do you think the position of the startor is a problem or is it just a coincidence that I just happend to have a fuel or carb problem? Any help or suggestions would be greatly appreciated. I did make a short movie to show what it sounds like. I don't know how to add that here. Thanks! Terry ![]() |
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Post by JR on Apr 13, 2016 20:07:24 GMT -6
 terryspa You've got a dirty carb and it's time to pull it off and give it a good cleaning. We've got how to's in the video section. JR
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Post by terryspa on Apr 14, 2016 5:28:13 GMT -6
OK. Thanks! I will try that today.
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Post by terryspa on Apr 14, 2016 14:35:44 GMT -6
I pulled the carb off and cleaned it. Checked all the connections and vacuum hoses. I still have the same problem. As I said earlier, the scooter was running ok before I changed the stator, it just was not charging. Now it is charging but will not run at any more than an idle. Doesn't seem like the stator would have anything to do with the problem but I may have to put the old one back in just to eliminate that.
Any more suggestions? Idle was nice about 1,800 RPM
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Post by cyborg on Apr 15, 2016 6:56:03 GMT -6
I'd agree with Jr on this one,,,I suspect the carb is still the issue,,,pull the top cover and check the diaphragm for tears and/or holes,,,this condition sounds quite like a bad diaphragm
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Post by terryspa on Apr 15, 2016 9:53:31 GMT -6
OK. I will check it again. I did look at it yesterday and all seemed ok. Still seems strange that it was working before I replaced the stator and I did not touch anything associated with the fuel system. But nothing surprises me any more with this scooter! Are rebuild kits available for the card or is my only option is to buy a new carb?
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Post by JR on Apr 15, 2016 12:41:28 GMT -6
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Post by terryspa on Apr 15, 2016 15:27:43 GMT -6
I checked the diaphragm and did not see a problem. When I put it back together, it would not even idle well like it did before and the only thing I touched this time was the carb. I guess I will order a new carb.
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Post by JR on Apr 15, 2016 22:35:07 GMT -6
Listen terryspa there is one thing I want you to check and it's the battery. This is a DC type CDI system and if the battery is weak it can effect the spark. Take a reading on the battery with a volt meter, you need 12Vdc or higher. If it is below that charger the battery for 4 to 6 hours with a slow charger and then let it sit for one hour and take a reading then. I have seen these scooters start with a low voltage battery but since it is a DC type CDI system then the CDI gets it's power from the battery and not the stator so a weak battery can make the CDI produce a weak spark. JR |
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Post by terryspa on Apr 16, 2016 8:35:29 GMT -6
It is a new battery and the voltage checks good. I will put it on the charger and try it again. Thanks for all the help!
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Post by terryspa on Apr 16, 2016 17:37:49 GMT -6
I put the charger on the battery and after charging the battery was a little over 13 volts (not running). I still have the same problem. I ordered a new carburetor and should get it next week. I will continue from there. Thanks again for all the suggestions.
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Post by ellpee on Apr 18, 2016 8:25:44 GMT -6
I have seen these scooters start with a low voltage battery but since it is a DC type CDI system then the CDI gets it's power from the battery and not the stator so a weak battery can make the CDI produce a weak spark. JR Hey JR, for my eddjicashun, elaborate on this a bit. I thought the role of the CDI was simply to sent a signal to the coil at the appropriate millisecond telling it to release a high-voltage impulse to the spark plug. Effectively, a fancy timer. Didn't realize the CDI actually plays a role in generating the spark. |
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Post by JR on Apr 18, 2016 12:45:15 GMT -6
Not so ellpee CDI, or Capacitor Discharge Ignition is composed of an electrical transformer, a rectifier, a capacitor and a series of circuits. Capable of producing a high-voltage spark to insure a strong combustion, the CDI requires an adequate power source either from a battery (DC Type) or the stator (AC Type). The ignition timing is a preset interval used to fire the spark plug at the right time to maximise combustion. On most scooters, timing is set a few degrees before the engine's piston reaches the top of its travel, referred to as Top Dead Center, and is often triggered by a magnetic or mechanical trigger circuit which is the pulse coil. This circuit stops the charging cycle of the capacitor, discharging the energy stored within the capacitor through the ignition coil wire. Ultimately, the high-voltage current is transmitted into the spark plug to create a spark at its tip to create combustion. In other words the CDI is charged by an electrical source and it discharges a high voltage to the coil and does so every revolution of the flywheel at the right time. The magnet on the flywheel is located to pass under the pulse coil right at TDC and tell the CDI to discharge it's power to the coil which in turn sends even a higher voltage to the spark plug to make it fire. The pulse coil on the stator is the unit that tells the sparkplug when to fire. JR |
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Post by ellpee on Apr 19, 2016 8:36:05 GMT -6
Ah so. Thanks, JR. I (and hopefully others) am a smarter person for that info.
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Post by terryspa on Apr 22, 2016 6:54:15 GMT -6
Update: I ordered a card from E Bay. Unfortunately they sent the wrong one! Have to start over again, more waiting!
By the way, I did buy a used Burgman 650 Executive this week. Nice! But I still want to get the 250 running if I can.
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