Home
Basic Dirt Bike How-To's - Video
Dirt Bike How-To's - Video
Living The Moto Life - Video
Bike Tests | Shoot-Outs - Video
Forums
What's new
Latest activity
Log-In
Join
What's new
Menu
Log-In
Join
Navigation
Install the app
Install
More options
Close Menu
Forums
Dirt Bike Discussions By Brand
Canadian Daves JustKDX
1986 Weak Spark Issues
Reply to thread
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
[QUOTE="Benesesso, post: 1328267, member: 61071"] My 1986 KDX200 has been getting harder to start, although it ran fine with an Iridium plug gapped real close at .018". The crummy ignition wouldn't fire even a new plug at .025" OK, must be the stator coil. Checked the ohms; right on the money (I know; doesn't mean diddley). Hooked up my analog AC voltmeter to the red&white/black stator wires, only got ~20 VAC with a good kick--spark plug out. Time to see just how much VAC it takes to get the CDI to fire. Hooked up my Lionel train transformer to the red&white/black CDI input side, and frame-grounded a good spark plug gapped at .018". No spark up to the max. output of the Lionel, ~20VAC. Figured 60HZ was like the engine at 3,600 RPM. Now what? Switched to a transformer I have, set it to 50 VAC, got good sparks. Opened the gap to ~.080", no sparks at all. Tried 55 VAC, got a few sparks. Tried 60 VAC, got a few more but not consistant. I mean I used to have an old Clinton 1 1/2 HP engine with a plain ol' magneto, and it would throw 1" long sparks easily by turning the crank by hand. Yes, I know, slow voltage-rise time. Put the gap back to ~.025", only got intermittent sparks. Tried 60 VAC again, more intermittent sparks, then POW!!! Seems there was too much smoke inside the CDI unit, and now it's all out. Anyone have a GOOD CDI for sale? I'll try that, and then probably end up buying a Ricky Stator coil. Anyone know if a later model CDI is better than the early ones? [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
Dirt Bike Discussions By Brand
Canadian Daves JustKDX
1986 Weak Spark Issues
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top
Bottom