Greetings folks ;O)

[fossie]

I know you've been on other sections with same query , and it is evident that you know your way around a bike , but what is the symptoms that leads the belief of cdi failure?

We had a 250 kat that wouldn't start onthe button turned over but always started with a bump. Put a 400 cdi on and started everytime .
However we have had the same symptons cured by ditching side stand switch.

[Fastasfowey]

Hi Fossie,
sadly I'd done the deal with the bike shop before the full story came out mate. He'd sold the bike to a guy some years back, taken it back as a non runner in part ex from the guy, presuming it'd just been stood a few years disused. When I pulled it to bits I found just the multi-plugs where a CDi should be. He decently offered me my cash back but I couldn't walk away for the sake of a CDi box, thinking it couldn't be too hard to find one haha. Still, I'm glad now as the search led me to this Club and I've found everyone so willing to help.
The last Katana I owned was the 1000S model back in 1989 and she was quite heavily modified too, I'd blown the crank and threw a rod on my 1100 EFE so it was intended as a donor for the engine at the time, but I'd always wanted another Kat since, so here we are mate really. Kawasaki from 1981 always wired the side stand cut out switch through clutch switch, and regularly you'd have to make a simple patch loom to bypass it just as you described above, interestingly, I've found info about the digital electronic ignition used by Suzuki since 1987 as posted elsewhere on here (sorry,I'm a complete Luddite with computers and probably put it somewhere obscure!), so I'll follow my nose and see where it comes back to. Probably a common issue with different cures as different symptoms will all lead back to the CDi with something different bypassed each time. Circuitry has to be the same from 250 to 400 so I'm guessing the CDi architecture in 1991 through 1993 was designed by the same guy, with the same routing, only interrupted by different features for different models. I see the 250 has a higher top speed in theory, not just highter revs so the speed sensor isn't common between the 2 models. The 250 bump starting sugguests a link between the CDi and starter button, GSXR style from 1995 era, I wonder if the 400 has a different cut out? Revs are unrelated, so is speed limiter so only other things in the circuit are kill switch/ starter switch and side stand switch.
It'll be worth me trying to find out I think as lots of members on here have spare CDi boxes, I even had offers to lend or sell me one. THAT's comeraderie for you )
I'm not sure what I know that might help anyone but served my time as a mechanic, worked for bike shops and was team mechanic (albeit Yamaha OWO1/ Exup era) for 9 seasons, and often found the problems were sorted by thinking more about what happens upto a point, rather than what isn't happening. The Japanese were never ones for trying to re-invent the wheel. Anyway, there's lots for me to learn and I always appreciate help and advice. I was just taught well in some things, the rest I ask for help with.........particularly with electrickery and computers !
All the best and hope I've not put too much in the wrong posts ;O)
Mark

[johnr]

32900-46D00 is the number of the cdi you want. early impulse cdi like callyboys wont fit, you need the impulse with the same engine as the gk77 kat 400. ive a spare, somewhere in the shed!!!!!

[Fastasfowey]

Hi Johnr,
mate that would be fantastic !
If I was closer I'd come pick it up as soon as is good for you mate, but would you post it down to me please and how much would you like for it?
Many thanks,
Mark
07513 037942