I need readable '93 (gsf400P) wiring diagrams

[andrewsw]

I'll post some pictures soon.

So, yeah, duh, it's not a jap bike. And (still haven't actually pulled the neutral switch to check it out) it has only the one wire, blue, cloth covered, coming from the switch... maybe someone cut it, but if so, it was right up at the switch. Meanwhile, the green/yellow wire from the cdi just sits there.

I'm still not convinced that it's limited, BTW, though it really seems to run out of steam at 100mph. As far as the rest of it goes, it's not a jap bike: single disk, mph gauges etc.

A

[Chris H]

You defo got a US bike then, but you feel that it maybe restricted and no US/Canadian models have a green/yel wire at the cdi,so draw from that what you may! the only way to tell if you got a jap cdi is to put a resistor between the green/y wire and ground, this was the quick fix for jap bikes.

[Vidrazor]

All this has made me curious. Here's the CDI from my bike:



Mine is also a '93. Are all 93 models a "P" model? Being as I've never had any ignition problems with my bike, I assume this is the correct box. If anyone knows otherwise, I'd like to know, because I think the previous owner may have been using this on a track and I always wondered if he hacked it up. Thanks.

[Banditmax]

Thats right for a p model.

[gsxr400 racer]

And i think that one is restricted

[Vidrazor]

How involved is it to un-restrict restricted B4s? Is it merely a process of disconnecting something, or do you have to swap out CDIs and/or do other mods?

[Banditmax]

Depends how energetic your feeling. You could just buy an m-max box.

[Vidrazor]

Therefore...

[Banditmax]

Or you could change the neutral switch as per http://www.400greybike.cc/newforum/viewtopic.php?f=53&t=166

[Vidrazor]

Does it have to read 1k ohm for it to work properly? What if 5th and sixth read nothing? If so, it seems to me to be a lot easier to mill the contacts so you never make any contact at all. Anyone ever try that?

What is the m-max box?

[Banditmax]

No it has to have a resistance to work properly. The m-max box i assume tricks the cdi into thinking its always got 1ohm resistance through there although ive never actually tried to find out what it does fully. But what i can tell you is it does not connect the gear switch to the cdi.

[Vidrazor]

Who makes the m-max box?

[Banditmax]

m-max, but the only supplier of them that i knew of seems to have gone bankrupt.
sales@apexleisure.co.uk is there email address if you wanted to try to get hold of them.

[Chris H]

Only havin a VV model that has diffrent wiring i probably kno less than Bmax,but the standard fix for all grey suzuki 400's was to put a 1.5k resistor between the green with yellow tracer wire, so the wire came out of the cdi then thrugh the resitor then the wire was taken to ground,maybe it worked or was a blag by the importers to sell bikes im not sure,the US P model bike shud only have 6 wires acording to the suzuki manual. wot is intresting tho is that some US models have a diffrent ignition timing than all the rest,i think for emisions?, so maybe changin the cdi for a diffrent one could give better power for the track, but this is merely a suggestion? anyone kno?

[Banditmax]

I think that 1kohm resistor is what the m-max is doing to be honest. But i don't have an m-max or similar anywhere close to me at the moment, but when i do eventually get home (read in july) i will get out the multimeter and let you know what it's doing.