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Good chance it has blown the cdi fuse ,alot of Chinese bikes have a separate fuse for the cdi unit,if it's ok I would say the generator is fried if you have had a burned out regulator.so check it for scorched wires.
Pretty straight forward, unbolting the cdi off the frame and replacing one wire at a time. Buying a service manual from say amazon for $20-25 bucks is the best investment you can make. It will offer other testing to be sure it's the cdi which is expensive, and be sure something isn't causing the cdi to burn out, once you take it out of the box it's yours, no returns on electrical parts.
find a running sr 250 and swop his cdi unit with yours if the bike runs, fine. if not put his cdi back in and try again. if the good bike now starts it will indicate that your cdi is faulty. the cdi is located under the tank inside the frame. don't buy a second hand cdi unless you can test it on a working bike. they are very expensive and you don't want to buy a dud
Possibly either behind one of the side covers (CDI might be attached to battery holder)
Or possibly under the tank bolted to frame.
Good Luck with it.
For more Bike stuff, go to YouTube/CrashTestDummyTV
Cheers
>:)
Hi,
The CDi usually breaks down when it gets an over voltage from the voltage regulator.
Try to replace the voltage regulator so that the CDi won't overheat.
Check also the ignition coil, it might have a short circuit it the connection terminal or the polarity is wrongly placed.
Thanks for using FixYa!
There is no easy way of testing a CDI completely, best thing to do is to check the spark plugs are sparking by removing them from bike and holding them against frame to earth (still connected to coils), crank bike over and check for a fat blue spark. Be warned, DO NOT hold with bare hands as you will get a electric shock!! This will give you an indication that the CDI is working.
A LOUD ticking sound could very well be a High Voltage Arc. This is usually caused by a breakdown of insulation on High Voltage Wires, or components. It can also be arcing between the door frame and the cavity. Usually where the bottom of the cavity floor meets the door frame. Indication of this will be small areas on the door where it looks like the paint has been chipped off, but if you look close you will see it is small burned marks. Another area is the Splatter Shield located inside and at the top. It looks like a Plastic Cover. It is not plastic, but a fiber material. Grease, and food will get trapped on and under this Splatter Shield. Over a period of time the grease and food particles will break down from being cooked over and over again. They will then form Carbon. Which will Arc when Microwaves are present. Remove Push-Pins holding Splatter Shield. Clean by washing with dish detergent . If burned (arc) spots are still present after washing, replace Splatter Shield or arcing will continue. Once Carbon has burned through, it will continue to burn.
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