New Rider
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Joined: Nov 17, 2013 15:54:17 GMT -5
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Post by bigjon on Dec 22, 2013 11:46:15 GMT -5
When trying to start my Vento R41,it almost turns over but wont fire. So I am going down the list. I have a Blue "performance Cdi",should the light blink when starting or should it be constant. Thanks
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Post by jjoshua20213 on Dec 22, 2013 12:05:37 GMT -5
Don't know about your cdi, but I had a Gold Casoli CDI, that worked perfect and died out randomly one day while riding. No symptoms. I just let off the gas and it didn't pick back up when I acceded. Then when it dies it wouldn't start. Put stock CDI in and it started like magic. Got home and changed back to the aftermarket cdi and it would not start. The aftermarket CDI was only a month old.
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New Rider
Currently Offline
Posts: 2
Likes: 0
Joined: Nov 17, 2013 15:54:17 GMT -5
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Post by bigjon on Dec 22, 2013 15:43:45 GMT -5
I have heard that the CDI's are subject to failure. During my check, I took the spark plug out and it was black and covered in gas. I wiped it with a rag and put it back in. And upon first crank, fired right up. I will order myself a spare CDI just to prevent down time in the future.
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Post by jjoshua20213 on Dec 27, 2013 2:10:32 GMT -5
Your running to rich and somehow flooded the engine. Black plug = Too much gas. Did you ever find out why that happen?
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Post by carasdad on Dec 27, 2013 8:29:48 GMT -5
 Black wet plug indicates too rich. It could also mean weak or non working spark components. But typically with a CDI..it either works..or is slam up dead.. Ignition coils and pickup coils can be intermittent.. Always start at the Stator and check voltages from there. If the stator has voltage to the CDI and pickup coil wires...check your ignition coil. But if it runs with the stock CDI..that may be your weak link.. I have found that performance CDI's will last either 5 minutes..or 5 years.. But then even the stock CDI is a weak link.. I offer customers road side repair..and the 2 biggest things I find are a broken belt..with the majority of break downs being the CDI..whether stock or performance. I get CDI's by lots of a dozen from my wholesaler..and it never fails that 2 out of the 12 arrive dead as a door nail.. Oddly this is not an issue with ignition coils..voltage regulators and the other electrical components.. 
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