Kdx 250sr

[Dan 250sr]

Has anyone ever tried to modify the cdi on a sr version. Stator wires go through a rectifier then to the cdi on my bike Japanese version... European kdx seem run straight of the stator to cdi . I have a kx 250 cdi , could this be wired in ? Be great to know if possible thanks...

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[Dan 250sr]

Has anyone ever tried to modify the cdi on a sr version. Stator wires go through a rectifier then to the cdi on my bike Japanese version... European kdx seem run straight of the stator to cdi . I have a kx 250 cdi , could this be wired in ? Be great to know if possible thanks...

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Kdx 250sr wiring diagram apparently , other one is for kx. Would it be possible to wire kx cdi to kdx ? Be great if anyone could help. Thanks

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[bufftester]

Can't read the SR diagram, but if the ignition and lighting circuits are separate like they usually are chance that you could use the KX CDI and coil in place of the SR units. That's assuming the SR has a similarly wired stator. Of course the curves will be for a KX powerband so you may lose some performance there. Is there a particular problem with your current unit?

[Dan 250sr]

Can't read the SR diagram, but if the ignition and lighting circuits are separate like they usually are chance that you could use the KX CDI and coil in place of the SR units. That's assuming the SR has a similarly wired stator. Of course the curves will be for a KX powerband so you may lose some performance there. Is there a particular problem with your current unit?

Ok I'll look into that. I know the sr goes to rectifier then cdi. I have fitted a 1988 kx barrel con rod and piston, with center power valve, I couldn't get sr piston. I just know it's got more to give at top end. Pulling like a train bottom end. And from what I can make out the sr cdi is slightly down rated? Thanks for input I hate electrics...

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[Dan 250sr]

Seems like a kx cdi uses one of the coils for timing curve...has a smaller coil.. also kx stator wires go straight to cdi.. kdx goes to rectifier/ regulator then back through to cdi. I'm having trouble getting my head around this timing curve voltage.. kdx puts out same voltage through all 3 stator wires

[Stevetooms]

Did you manage to get the kx250 CDI to work on your kdx250 pal

[Dan 250sr]

Hello sorry just seen message, no I kind of gave up as my stator isn't compatible with that cdi, from what I can make out you need a signal to make timing curve work, the kx uses the smaller coil for that from what I can see

[kdxsully]

Probably has an exciter coil, right?

[Dan 250sr]

From what I can make out it uses the smaller coil on a kx to adjust timing curve, kdx 250 sr coil is completely different... I think the smaller kx just makes more voltage as revs get higher and that's how it changes timing.. stand to be corrected on that...

[Stevetooms]

Well does anybody have a CDI for an kdx250sr 1991 model knocking about I am after one please