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03 FE501 SEM Coil / CDI

Joined Feb 2008
72 Posts | 0+
NSW Australia
Hi Just traced a mates hard to start 03 FE501 to be a faulty CDI / Coil unit. Anyone have one for sale or know where I may pick one up cheap ? ? Over $500 here in Australia.
Regards Dan
 
Danielson said:
Hi Just traced a mates hard to start 03 FE501 to be a faulty CDI / Coil unit. Anyone have one for sale or know where I may pick one up cheap ? ? Over $500 here in Australia.
Regards Dan

Hi Dan,

What tests did you do to conclude it is the cdi, I presume you did get the bike running, what did it run like once started?.

Regards

Sparks.
 
Hi Sparks, I had the bike running last week but it sounded poor and stalled. Today we cleaned the carb and checked the valve clearances, as well as static timing. Tried to start it but only got a few fires out the motor. I removed the spark plug and hooked up a spark tester and it would only jump about 3mm consistently so I tried 2 other stators in it which produced the same weak spark. To be sure I put his stator in my own 400 and it jumped a good 10mm or more. Only thing that wasn't the same was that I cranked his off the electric start (plug removed) whereas mine was done with the kickstarter.
There is a white wire coming from the CDI that looks as if it is fed 12v + when cranking the motor off the button is this correct.
Thanks for your quick reply, Dan
 
You've probably already checked it but incase you havent it could just be a dud ht lead, the lead will just unscrew out of the coil get yourself a multimeter and measure from one end to the other, I've never looked at one but I imagine you should be able to measure the ht coil as well , I'd be looking for a connection between the ht and one of the leads going into the thing .cheers matt
 
Danielson said:
Hi Sparks, I had the bike running last week but it sounded poor and stalled. Today we cleaned the carb and checked the valve clearances, as well as static timing. Tried to start it but only got a few fires out the motor. I removed the spark plug and hooked up a spark tester and it would only jump about 3mm consistently so I tried 2 other stators in it which produced the same weak spark. To be sure I put his stator in my own 400 and it jumped a good 10mm or more. Only thing that wasn't the same was that I cranked his off the electric start (plug removed) whereas mine was done with the kickstarter.
There is a white wire coming from the CDI that looks as if it is fed 12v + when cranking the motor off the button is this correct.
Thanks for your quick reply, Dan

Hi Dan,

When you hit the start button this should feed 12v down the white wire into the cdi.
Did you check the spark performance with the plug cap removed, these have been known to go faulty from time to time.
Regarding a broken HT lead I doubt it they don't get any bend abuse and even if the centre conductor was broken the
HT voltage would still come through quiet easy.
I think all the systems I have tested that show similar problems to yours apart from a couple all have run up OK on the test rig, what I would do Dan is, if your 400 is running OK put his cdi on to your bike an see what happens.

Regards

Sparks.
 
I have a CDI unit that fits a 2002 FS650. It's new but I didn't need it because the stator was the faulty part. Willing to sell if you're interested.
 
Hi Loonyberg I would be very interested in your 650 CDI. Do you take paypal and will you post it to Australia ? Also I should ask How Many $$. Sent you a PM but have not heard back.
Cheers Dan
 
I have tested the spark again with very different results, first I tried disconnecting the white wire from the CDI (which gets 12V + when you hit the button) and cranked it off the button = no spark at all, then I kicked it = good spark to 10mm or more, then I hooked up the white wire again that goes to 12V + when you hit the button and spark was there but only good to about 5mm which is better than I had last week. It started second kick off the kickstarter but not off the button.
My conclusions are (please correct me if wrong) that when using the kickstarter it turns the motor a lot faster and generates enough power to make a good spark. When using the electric start with the white CDI wire disconnected there is no spark which to me says that the motor is not cranking fast enough to generate a spark on its own but when the white wire is connected it gets 12V + from the battery to generate spark but it is still weak. My conclusion would be that the engine needs to turn faster off the electric starter to make a good spak on it own or it needs more power going down the white wire when cranking but the starter motor is taking most of it.
Over to you Sparks.
Regards Dan
 
Danielson said:
I have tested the spark again with very different results, first I tried disconnecting the white wire from the CDI (which gets 12V + when you hit the button) and cranked it off the button = no spark at all, then I kicked it = good spark to 10mm or more, then I hooked up the white wire again that goes to 12V + when you hit the button and spark was there but only good to about 5mm which is better than I had last week. It started second kick off the kickstarter but not off the button.
My conclusions are (please correct me if wrong) that when using the kickstarter it turns the motor a lot faster and generates enough power to make a good spark. When using the electric start with the white CDI wire disconnected there is no spark which to me says that the motor is not cranking fast enough to generate a spark on its own but when the white wire is connected it gets 12V + from the battery to generate spark but it is still weak. My conclusion would be that the engine needs to turn faster off the electric starter to make a good spak on it own or it needs more power going down the white wire when cranking but the starter motor is taking most of it.
Over to you Sparks.
Regards Dan

Hi Dan,

Why do you think I asked you to send your cdi to me when you received the new one...LOL..
Simple answer Dan your stator is on it's way out, the 12v feed to the cdi is only and amplifier it doesn't take over 100%, hence the weaker spark.
But there again I could be wrong and it is actually the starter that is not turning the engine fast enough, but with the plug out it will be turning way fast than with a plug in.
Simple test do what you have done when the engine is cold then repeat the test when the engine is hot, especially on the kick start and see if you notice any difference in spark performance, ie having to kick it harder to obtain a spark, if so defiantly your stator.

Regards

Sparks.
 

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