Are Ignition Boxes a Common Problem

bikertrash2001 · June 5th, 2011, 04:46 PM

Hey All,

New to the forum here, but personally an old fart. I got a 92 250 that my father-in-law had big aspirations for but never got around too. It's been pretty neglected, but for the most part, the innards of the motor look pretty good.
Anyway, when I finally got the carbs and tank degunked and set the valves, I got good fire on the left cylinder but a very erratic spark on the right. I could hook my timing light up to the wires and see it was pretty shaky. It would only run on full choke and then it was the left cylinder just dragging the right against it's will. I swapped the coils from side to side with no change. I took the wire from the ignition box (green) out and ran a straight wire from the box to the coil with no help either.
I don't see a lot of posts on here about ignition boxes being bad. And also by the fact that you can buy them on ebay pretty cheap speaks volumes. Usually if it's a common bad part, the prices are crazy.

Thanks!

Alex · June 5th, 2011, 06:02 PM

The CDI is often flaky on the new-gens (2008+). Seemed to be more reliable in the older generation ninjettes. But any part can certainly fail, and perhaps it did here as well.

June 5th, 2011, 04:46 PM	#1
bikertrash2001 ninjette.org newbie Name: Jon Location: North Alabama Join Date: Jun 2011 Motorcycle(s): 1992 EX250, 2002 Yamaha Roadstar Warrior, 1973 Honda 450 Cafe Posts: 1	Are Ignition Boxes a Common Problem Hey All, New to the forum here, but personally an old fart. I got a 92 250 that my father-in-law had big aspirations for but never got around too. It's been pretty neglected, but for the most part, the innards of the motor look pretty good. Anyway, when I finally got the carbs and tank degunked and set the valves, I got good fire on the left cylinder but a very erratic spark on the right. I could hook my timing light up to the wires and see it was pretty shaky. It would only run on full choke and then it was the left cylinder just dragging the right against it's will. I swapped the coils from side to side with no change. I took the wire from the ignition box (green) out and ran a straight wire from the box to the coil with no help either. I don't see a lot of posts on here about ignition boxes being bad. And also by the fact that you can buy them on ebay pretty cheap speaks volumes. Usually if it's a common bad part, the prices are crazy. Thanks!

June 5th, 2011, 06:02 PM	#2
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	The CDI is often flaky on the new-gens (2008+). Seemed to be more reliable in the older generation ninjettes. But any part can certainly fail, and perhaps it did here as well. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

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