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| bradh511 |
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bradh511
Scooby Slapper
Joined: 01 May 2009
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 Posted: 21:04 - 19 Dec 2014  Post subject: Gs125 broke down again :( |
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hello again my suzuki gs125 broke down again last time it cut out at a junction and didnt start again ... I lifted tank off opened cdi to find dmp i sparyed some wd40 in side also all coil connection and it fired into life ... This time i was going down a main dual carriage way and it started to miss and got worse .. To point it cutout then had a massive backfire so presume its spark .. But it has spark only thinking cdi is makeong it fire incorrectly.. Anyone had this sort of problem woodruf keys fine ect
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Theory 11-10-12 lets hope i get mod 1 and 2 done by the 18th of jan 2013  |
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| Taught2BCauti... |
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Taught2BCauti...
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Joined: 12 Jan 2012
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| Posted: 11:26 - 20 Dec 2014 Post subject: |
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It's possible that the damp has damaged the CDI unit, but start by making sure it is thoroughly dry.
Remove the spark plug to see if you are getting a good spark, and whilst it is out, do a compression test.
Check wiring connections for corrosion, including earth points, and check battery voltage with a volt-meter. Some CDI units don't work properly on low voltage.
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Honda Varadero XL125(V8)
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| Bishopgaming |
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Bishopgaming
Derestricted Danger
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| bradh511 |
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bradh511
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| Posted: 17:10 - 20 Dec 2014 Post subject: |
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Comps good. Batterys fucked but always ran with a bump or off electric start cleaned all connections but spark seems not like it should ... Any ideas if its cdi or coil thinking its coil break down now
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| Taught2BCauti... |
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Taught2BCauti...
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| Posted: 17:15 - 20 Dec 2014 Post subject: |
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Try again with a good battery.
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Honda Varadero XL125(V8)
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| bradh511 |
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bradh511
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| Posted: 21:48 - 20 Dec 2014 Post subject: |
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The started with flat battery after 2 years and did 700 miles ... I know it needs a battery but its not the fault.... Its fault lies deap in the ecectrical system anyone got values for testing cdi and coilon one of these
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| Taught2BCauti... |
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Taught2BCauti...
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| Posted: 10:22 - 21 Dec 2014 Post subject: |
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Coil is easy to test - disconnect the wires from the CDI, and measure the coil resistance with an ohm-meter. Coils usually fail open-circuit, so any reading above zero is a good sign.
You can also try putting 12v DC from a good battery (not your knackered one) across the coil terminals - you should get a spark at the plug when you disconnect one of the terminals.
Testing the CDI, is not a DIY job - best way is by substitution with a known good working unit.
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Honda Varadero XL125(V8)
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| bradh511 |
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bradh511
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| Posted: 15:05 - 21 Dec 2014 Post subject: |
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So what your saying is test coil... If no good buy a cdi
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| Taught2BCauti... |
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Taught2BCauti...
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| Posted: 16:19 - 21 Dec 2014 Post subject: |
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| bradh511 wrote: | So what your saying is test coil... If no good buy a cdi |
No - I'm saying it is easier to test the coil than the CDI unit, so test the coil first.
If the coil is duff, then replace the coil. (Why would you buy a new CDI unit if you know you have a duff coil?)
If the coil is good, it must be something else - in which case, try swapping the CDI unit next.
If you know someone with the same bike as yours, try putting your CDI unit on their bike, or put their CDI unit on your bike.
If their bike works fine with your CDI unit fitted to it, then it's not your CDI unit that's faulty.
If their bike doesn't work with your CDI unit fitted to it, but your bike works with their CDI unit fitted - then your CDI unit is faulty.
This is the best way to test the CDI unit, I don't know any other way you could test it without an oscilloscope.
If you now know that you have a good coil and a good CDI unit, the next thing to try, is the pulse generator that triggers the CDI unit - and the best way to do that, is by substitution again, unless you know what type it is and have an oscilloscope.
Having said that, most bike ignition systems require a good battery to work at all, so if you already know yours is duff, change it for a good one first!
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| bradh511 |
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bradh511
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| Posted: 17:14 - 21 Dec 2014 Post subject: |
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I said my batter is duff because it doesnt hold charge properly but still useable....as for swapping cdis on bike i dont know anyone so will have to buy another yes i can test the coil .... And the bike broke down with a fully charged battery so why would this be the problem .....yes pulse generator i could see being wrong i have a spark but strength is intermittent i think the coils fine still awaiting better weather to check ..... And my only other options is to buy a new cdi to test that its not the fault
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| cb1rocket |
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cb1rocket
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Old Thread Alert!
The last post was made 11 years, 290 days ago. Instead of replying here, would creating a new thread be more useful? |
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