CDI box?

[Mick04]

How does one know when there cdi box is bad. If I still have spark on my 81 185s is that a good sign or bad? The spark is week and yellow. I know they are a trailprotrailprotrailprotrailprotrailpro to test but does anyone have the procedure they could post or e-mail me. Thanks

[hondaATCman]

Well, when my CDI went bad on my Yamaha XJ 550 street bike, I was getting mixed signs of spark. Like a very weird pattern...I would have a nice, fat blue spark one second, no spark at all a second later, then maybe a very week spark after that, and repeat. It would vary on all 4 cylinders too.

[BIG BAD RED]

there is a guy that repairs them here in oz after they loose there memory but it would be a last resort for$$$..not cheap...

[trikezilla]

LOL...ITS ALWAYS A GOOD SIGN TO HAVE SPARK (minus the fact it is weak and yellow...it should be a "fat, wide, blud spark" [clymer manual]. If i was you, i would by a cheap one off ebay, and go from there.

[Mick04]

How do I know that the ones off ebay are going to be any good either? I mean I could sell mine as good but I bet it isn't. You know what I mean, just because I have spark doesn't mean that it is any good right!

[jeswinehart]

you are right about being a pain to test out the cdi's mick ,,, time consuming also.
indicators of a bad cdi are weak or no spark ( at least that's what my manuals say )

pm me your mailing address + i'll mail copys of the procedure.


john

[86200s]

i didnt think i had a weak spark but i worked on this guys 200m and when i turned it over it had a huge spark compared to mine and i shocked myself and i couldnt even feel my bikes spark sometimes but his i felt strong every time would the cdi or ignition coil or both be responsible for that

[86200s]

my bike runs fine most of the time but sometimes it has trouble starting its a 86 200s .20 over high compression not sure how high