No spark - Curvy. - SV650.org

11-06-12, 01:24 PM

so as tha title suggests, engine turns but i got no spark on either cylinder so it wont start..
obviously tried checking fuses, replacing plugs, even borrowed known working coils off a friend, nothing..
ignition relay seems to be working as its clicking but other than that dont know what else to check ti pinpoint the prob..
an ancient manual i have suggests checking the signal generator but my knowledge on electrics is limited and im a bit hesitant in opening up the engine:P
any ideas guys(/girls) ??

flymo · 11-06-12, 01:29 PM

what are we talking? lawnmower? strimmer? Motorcycle?

11-06-12, 01:58 PM

haha good point, 2001 faired curvy

flymo · 11-06-12, 03:17 PM

Have you checked the pickup coil/CDI unit etc?

11-06-12, 07:43 PM

how do you test a CDI unit? isnt that really specialized and expensive?

flymo · 11-06-12, 07:54 PM

Quote:

Originally Posted by joker650

how do you test a CDI unit? isnt that really specialized and expensive?

Yeah, technically called an Ignition control unit in this case. Easiest way is to use a known good one to verify.

But before doing that, check the pickup coil resistance and for earth grounding. Do you have a multimeter handy?

11-06-12, 08:05 PM

Quote:

Originally Posted by flymo

Yeah, technically called an Ignition control unit in this case. Easiest way is to use a known good one to verify.

But before doing that, check the pickup coil resistance and for earth grounding. Do you have a multimeter handy?

As Flymo says, check your pickup coil.

No need to take anything off the engine, just unplug it from the loom and check the connectors. IIRC the three contacts shouldn't show continuity between any of them, it should show a resistance which I can't recall, and generate x amount of volts when turning the engine over.

This happened to me, I'll try and find the thread.

flymo · 11-06-12, 08:08 PM

Should only be two wires, not three. One green, one white. 140 to 230 ohms at 20 deg c. Neither should show continuity to the engine earth when the coil connector is disconnected from the loom.

11-06-12, 08:12 PM

Ignore my last post, completely wrong! Check this thread!

http://forums.sv650.org/showthread.p...ighlight=Spark

In particular the bit about the signal generator. This tells the bike when to spark each plug, though I think both spark anyway regardless of which one is needed.

14-06-12, 01:05 PM

turns out its the cdi unit.. tested it with a known working one, worked like a dream..
anyone know of any for sale apart from ebay cos prices look a bit steep on there
(100 + shipping)

11-06-12, 01:24 PM	#1
joker650 Guest Posts: n/a	No spark - Curvy. so as tha title suggests, engine turns but i got no spark on either cylinder so it wont start.. obviously tried checking fuses, replacing plugs, even borrowed known working coils off a friend, nothing.. ignition relay seems to be working as its clicking but other than that dont know what else to check ti pinpoint the prob.. an ancient manual i have suggests checking the signal generator but my knowledge on electrics is limited and im a bit hesitant in opening up the engine:P any ideas guys(/girls) ??

11-06-12, 01:29 PM	#2
flymo Member Mega Poster Join Date: Jan 2008 Location: North West Posts: 3,124	Re: no spark what are we talking? lawnmower? strimmer? Motorcycle?

11-06-12, 01:58 PM	#3
joker650 Guest Posts: n/a	Re: no spark haha good point, 2001 faired curvy

11-06-12, 03:17 PM	#4
flymo Member Mega Poster Join Date: Jan 2008 Location: North West Posts: 3,124	Re: no spark Have you checked the pickup coil/CDI unit etc?

11-06-12, 07:43 PM	#5
joker650 Guest Posts: n/a	Re: no spark how do you test a CDI unit? isnt that really specialized and expensive?

11-06-12, 08:08 PM	#8
flymo Member Mega Poster Join Date: Jan 2008 Location: North West Posts: 3,124	Re: no spark Should only be two wires, not three. One green, one white. 140 to 230 ohms at 20 deg c. Neither should show continuity to the engine earth when the coil connector is disconnected from the loom. Last edited by flymo; 11-06-12 at 08:09 PM.

11-06-12, 08:12 PM	#9
sam anon Guest Posts: n/a	Re: no spark Ignore my last post, completely wrong! Check this thread! http://forums.sv650.org/showthread.p...ighlight=Spark In particular the bit about the signal generator. This tells the bike when to spark each plug, though I think both spark anyway regardless of which one is needed. Last edited by sam anon; 11-06-12 at 08:14 PM.

14-06-12, 01:05 PM	#10
joker650 Guest Posts: n/a	Re: No spark - Curvy. turns out its the cdi unit.. tested it with a known working one, worked like a dream.. anyone know of any for sale apart from ebay cos prices look a bit steep on there (100 + shipping)

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