Snake
Junior Member
Posts: 27 
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Post by Snake on Aug 13, 2016 16:08:27 GMT
Hi,
My sd died, overnight.....No spark, turns over, lights etc all ok. I have been through the threads on here, I have a spare coil and CDI but both are unproven. I have tried all 3 combinations of old part/replacement part but nothing. Is there really no way to test these parts without trying them on a running bike?
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Deleted
Deleted Member
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Post by Deleted on Aug 13, 2016 19:57:32 GMT
No easy way of checking the CDI in my opinion and resistance checks of the coil can be misleading too  - check the simple stuff like cut out switch first - remove the black white wire under the tank so you know nothing is earthing out the ignition . If you have a multi meter check the alternator too - drive.google.com/file/d/0B0BD_MkiU7Jpb1VXYXNqMTRmdTQ/view?pli=1When you get chance get your spare CDI and coil on a running bike so you know their status . |
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Snake
Junior Member
Posts: 27
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Post by Snake on Aug 14, 2016 2:37:57 GMT
Hi Bojer. I tried the kill switch first off, changed the coils and CDI's around cleaning all the contacts as I went but still nothing.
Thanks for the link but it is for the 250, are these interchangeable between the 250 and 400's?
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Post by na44superdream on Aug 14, 2016 6:54:07 GMT
Had a similar problem, it was not a major component, it was a connection in the left hand electrical panel in the end.
The CB400N has the Hitachi Geni & CDI. (Let my spare 400 CDI go a couple of years ago, since I've only CB250N engines)
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Deleted
Deleted Member
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Post by Deleted on Aug 14, 2016 21:26:56 GMT
Hi Bojer. I tried the kill switch first off, changed the coils and CDI's around cleaning all the contacts as I went but still nothing. Thanks for the link but it is for the 250, are these interchangeable between the 250 and 400's? So in a nutshell.....the coil is the same on 250 and 400 models.....and for the record, it is also the same on all Superdream and Dream models, 250 and 400. The CDI's you have to be more careful with. The 250 Superdream utilised a Nippondenso CDI, the 400 a Hitachi item. A lot of bike breakers don't really understand this and will sell you a CDI 'fit' for 250/400 Superdream - so be careful out there!!! At least you are a snake - if you get stung you can bite 'em back.  |
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Snake
Junior Member
Posts: 27
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Post by Snake on Aug 15, 2016 11:51:54 GMT
Ah, right, so the coil is compatible but the CDI is a Nippondenso so is a no no.
Is there anyone who would be able/willing to test these parts for me for a crossing of palm with silver? or has a CDI for sale/hire. Was off for a ride this weekend with my son (CBR125r) so it would be good if there is a way to get this sorted.
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Post by richrich on Aug 16, 2016 9:16:27 GMT
So, died overnight, probably cdi as this has happened before!
You have the resistance matrix for the genny and cdi?? ,as well as red neon plug caps or similar to "see" HT, a multimeter to see resistance and outputs, and a flywheel "extractor bolt".
Some have used the oil filter bolt but beware that although the size and thread are the same, the filter bolt wall thickness means that the face that butts up against the crank end is small, meaning that the butt face sits on the taper, and may cause the thin bolt wall to split or burst, meaning a new "can of worms".
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Post by richrich on Aug 16, 2016 9:28:38 GMT
Read in your intro, she has been playing up, starts fine, runs well until warm/hot, then will not rev over 4/5 k revs ish?? and/or starts fine but wont rev at all well, very poor power and exhaust front pipes "glow"?? feels like a fuel problem ( which she also may/will have ) bit isnt, now she is dead.
Get matrix info as a starting point, 250 cdi will allow eng to run but not very well at all.
Speedshop do a 400 cdi unit which seems fine, been on lads 400 for some time now.
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Post by richrich on Aug 20, 2016 15:52:06 GMT
had any help/info yet??
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Post by rich on Aug 30, 2016 12:37:01 GMT
i see that "censorship" is still alive a well on here, only allowed to send a PM to a staff member rather than to any member on here!!
snake, did you get the info you need yet??, please reply in "open space"
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Deleted
Deleted Member
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Post by Deleted on Aug 30, 2016 13:29:12 GMT
I think all the OP's questions were answered Rich- are you offering to test his ignition parts?
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Post by rich on Aug 30, 2016 13:43:18 GMT
if need be, but since his quieries have been answered, the acid test is using them on his bike?
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Post by Gorgonzola on Aug 30, 2016 16:31:57 GMT
No censorship evident on this site.
Surely the OP could email you (Rich) should he should feel the need to?
I don't see grounds for such comments.
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Post by rich on Sept 6, 2016 10:25:42 GMT
hi terry, tried to pm you did you get it?? still seem unable to pm members at my end??
screen message says i can only pm staff.
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stevegbr
Administrator 
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BIRMINGHAM
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Post by stevegbr on Sept 6, 2016 10:36:29 GMT
hi terry, tried to pm you did you get it?? still seem unable to pm members at my end?? screen message says i can only pm staff. he has not been online since august 27th. |
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- check the simple stuff like cut out switch first - remove the black white wire under the tank so you know nothing is earthing out the ignition . If you have a multi meter check the alternator too - 
