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Old 09-12-2013, 08:20 AM   #98
stainlesscycle
Beastly Adventurer
 
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Joined: Jun 2008
Location: morgantown, wv
Oddometer: 2,144
Quote:
Originally Posted by Scootern29 View Post
Put the CDI box in the oven at 180 degree's for 20 minutes and see if it changes anything. An old Yamaha mechanic told me this a few months ago.

I had the same kind of symptoms on my MX125C and the CDI box was bad.
i gleaned this from the internet a while back. can't remember where. try at your own risk..

"I've read but not tried it myself that dead CDI boxes can be brought back to life by placing in an oven and heating.

"Holy cow, it works. I had 2 units, 1 was completely dead, no spark at all. I put it in the oven at 300* for 20 minutes, connected it and it made spark, kicked it and the bike started but wouldn't rev up. I then took the 2nd unit I had that made spark and didn't rev and baked that one for 20 minutes. connected it and kicked it over. She fired up, and revved just like new. How it works I have NO idea, but it does. "
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