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Thread: Spark still possible with bad CDI? Reply to Thread
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Topic Review (Newest First)
11-28-2012 02:03 AM
Originally Posted by essphore View Post
Ok, found out that I didn't clean the pilot jet well enough, and both valves were were sticking/stuck. I'm pretty happy right now, and my daughter is finally gonna learn how to ride a quad. Thank you to everyone for their input!

Good deal then,you're welcome...
11-27-2012 11:28 PM
essphore Ok, found out that I didn't clean the pilot jet well enough, and both valves were were sticking/stuck. I'm pretty happy right now, and my daughter is finally gonna learn how to ride a quad. Thank you to everyone for their input!

11-25-2012 09:56 PM
essphore Thanks for all of the replies everyone! I did download a manual, and the coil falls within spec. I ended up dropping it off at a friends (he repairs all types of bikes/water crafts for a living) house, so I will report back with the results. The good thing is he has worked on a few TRX 90's in his career. Thanks again.

11-25-2012 06:50 PM
Deeperinthabush Welcome to da forums... Yes it is possible to get spark to the plug if the cdi is going bad... If the cdi is going bad it can have a whitish/yellow colored spark,or an intermittent spark,but will eventually quit having any spark at all(usually pretty soon)..You can see if the cdi gets hot to the touch if you can get it to run,and if it is hot then it is going out...Cold to slightly warm is ok...Also,check the coil itself,and the coil wire using the meter,and specs from the free e manual located in the schematics,and repair manual section on the main page.. is the password if prompted for one...
11-25-2012 07:48 AM
TRX2fiveO If you have the cover off there is a pink wire in a spring style lock you can removed that wire and check the spark again. However You more than likely have a bad pulse generator.
11-25-2012 07:38 AM
Melatv Check the compression --- you will see oil in the valve cover that is normal.
11-24-2012 08:45 PM
essphore I get a Yellowish/blueish, but not BRIGHT blue spark. That's good to know I can still get spark with failing CDI. I actually call a local dealer, and was told that if I have spark the CDI is still good. I'm not sure what to think now. A factory CDI is around $145, and I found a "Big Gun" rev box on Amazon for $114 shipped. I may go that route. Any other members have any more input? Thanks Again.
11-24-2012 08:36 PM
cmanningjr You can get intermitten spark with a cdi going bad..What color is the spark?? Bright Blue??
11-24-2012 08:36 PM
1991honda350 I had a whole bunch of spark/no spark issues with my bike, a 1991 Honda 350 4x4, then I remembered that I read on here somewhere that a member had to give his cdi a tap then it would be good again, I did the same and I was good to go (I replaced the cdi) so it is possible to have a bad(?) cdi and get spark but I found it wasn't steady or reliable
11-24-2012 07:24 PM
Originally Posted by Melatv View Post
When you check the plug is it wet with gas after trying to start it? Did you do a compression test?
I did remove the lower valve cover, and found a little bit of oil pooled in the cover. Mean anything?
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