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| 1979 RM 250 CDI problems http://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=29&t=2633 |
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| Author: | clandis703 [ Sun Mar 28, 2010 1:43 pm ] |
| Post subject: | 1979 RM 250 CDI problems |
I just had a 2nd cdi fail on my RM 250. It runs perfectly otherwise, but after having one go bad, the second failed after 30 minutes of riding. Does anyone know if there could be something else in the electronics that might cause this, or do I just have bad luck? Any help would be appreciated. Clint |
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| Author: | rayivers [ Fri Apr 02, 2010 8:02 pm ] |
| Post subject: | Re: 1979 RM 250 CDI problems |
Clint, It could be the input voltage(s) from the stator are too high, or possibly the coil has degraded and is burning out the CDI output switching thyristor/transistor. You'll need a really good multimeter to test the stator voltages (they're very short duration spikes) and coil input resistance (the coils I've measured have been pretty low resistance). Ray |
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| Author: | clandis703 [ Sun Apr 04, 2010 6:50 pm ] |
| Post subject: | Re: 1979 RM 250 CDI problems |
Ray: Thanks for the input. Due to my frustration, I spent the money for the PVL ignition system. I just didn't want to continue to mess with it plus most of the testing was over my head. So, I spent the money and it runs great!! Thanks again, Clint |
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| Author: | rayivers [ Mon Apr 05, 2010 8:09 am ] |
| Post subject: | Re: 1979 RM 250 CDI problems |
Clint, Quote: I spent the money for the PVL ignition system That's what I should have done with my Hondas! Instead, I just kept buying stuff off eBay, now I'm having a rotor remagnetized to try and eliminate a weird idle problem... it just goes on and on. For the most part the bikes run well, but I'm sure they would run better with the PVL unit. Ray |
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