Bike sparky help needed.

[nzspokes]

+1 to pete's suggestion. If it works as suspected, then use the voltmeter (as suggested earlier) to isolate which part of the loom is dropping the voltage, it should read almost zero across an two points on either the positive, or negative side. If it doesn't move the test points closer together until you narrow the fault down.

Problem is its got 6 wires going in. Dont know which to put it to.

[bogan]

What are the colors of the wires going into the CDI, probably the same across a few hondas of that era (and I've had a few :P).

[nzspokes]

Black/white, Black/yellow,blue,blue/yellow,white,green

[bogan]

Green = ground
B/W positive (switched through ignition), also goes to coil +ve
those two are the only ones common with mine, if your's is single coil it would explain why the rest are different, i'll assume so for subsequent guessing.
black yellow is probably to the coil negative
blue and blue yellow likely to be pulse generator wires

hmmm, not too sure what that white one will be, maybe white is positive, and black white goes only to the coil positive? or vice versa.

In any case, I think assume green is ground, so check what voltage is present between that and your battery earth when the key is on. Also check what voltage is between battery earth and the B/W, and white wires.

[nzspokes]

Green = ground
B/W positive (switched through ignition), also goes to coil +ve
those two are the only ones common with mine, if your's is single coil it would explain why the rest are different, i'll assume so for subsequent guessing.
black yellow is probably to the coil negative
blue and blue yellow likely to be pulse generator wires

hmmm, not too sure what that white one will be, maybe white is positive, and black white goes only to the coil positive? or vice versa.

In any case, I think assume green is ground, so check what voltage is present between that and your battery earth when the key is on. Also check what voltage is between battery earth and the B/W, and white wires.

Would any be the kill switch?

[bogan]

Would any be the kill switch?

Generally the kill switch just cuts the power to the cdi.

Another option to check which is which, is to remove the CDI, put the -ve lead of the multimeter on the earth, and do a voltage check for all wires with the key on, and resistance check for all with it off.

[nzspokes]

hey, just worked out it doesnt look like im getting out of the black/white

[bogan]

hey, just worked out it doesnt look like im getting out of the black/white

getting any voltage out of it you mean? check the white as well just in case. If nothing there either, open up the switch cluster with the kill switch on it and see what color those wires are, and if voltage is present.

[nzspokes]

getting any voltage out of it you mean? check the white as well just in case. If nothing there either, open up the switch cluster with the kill switch on it and see what color those wires are, and if voltage is present.

Green and black and white. No voltage if switch on or off.

[bogan]

Green and black and white. No voltage if switch on or off.

Ok, does your multimeter have a 200ohm or similar setting? Check that from battery negative to green wire at the cdi.

[pete376403]

Does this help - wiring diagram last page
http://www.hondampe.com.au/docs/owni...CB250-1992.pdf
or
Honda CB125 74 Service Manual ENG http://www.megaupload.com/?d=1HR7J1TE

Honda_CB125_CB160_Shop_Manual_1972 http://www.mediafire.com/?5ignzmzdh2v

Honda CB250,360,CL360,CJ250 T,360T Service Manual ENG http://www.megaupload.com/?d=NU65ZOAL or
http://www.mediafire.com/?dufwgzn1wjw or
http://www.megaupload.com/pl/?d=29MXHLW4

Honda CB,CL,SL 250-350 http://www.mediafire.com/?5f3menxnmzm

Honda CB250rs http://www.4shared.com/file/24781708...b/cb250rs.html


Honda CB400 N Parts List http://www.megaupload.com/?d=Q1VZTP16

Honda CB400 N Service Manual GER http://www.megaupload.com/?d=OSXAU4B8 or http://www.mediafire.com/?f2yyzzlbzdy

Honda CB500 (S) 93-01 Haynes Service Manual ENG http://www.megaupload.com/?d=QWI03K35

[nzspokes]

Ok, does your multimeter have a 200ohm or similar setting? Check that from battery negative to green wire at the cdi.

Black wire is switched power. Pulled switch apart again. And green from cdi to battery - is .5ohm.

[ducatilover]

PM me your email and I'll send you a manual mate

[nzspokes]

Ok, What ive worked out is....

Black/white kill switch. Goes to ignition and kill switch.

Black/yellow goes to coil and tach so pulse line.

Blue Pulse generator

White Pulse generator

Green earth, goes to coil also.

Blue/ yellow is ??? Guess it has to be power in?

[nzspokes]

The blue yellow goes to the clutch side of the motor. Seems to be a switch in there. 2 wires go in, the blue/ yellow and green/white. Could that be the pulse generator? I thought it was in the stator as the blue and white come from the stator which is on the other side of the motor..