View Full Version : Help, no rear spark... no AR
In a continuation from this thread (http://forums.sv650.org/showthread.php?t=91918) I have been working on Helga most of today, mainly to get her ready for the AR but also to find out why the hell I have no rear cylinder spark.
Now this is what I have done so far...
Replaced the spark plugs and tested them for a spark on my other SV.
Tested and swapped the coils from the other SV.
Swapped the CDI from the other SV.
Tested the voltage from the front coil, ignition on 10v dropping to 8v when engine is turned over.
Tested the voltage from the rear coil, ignition on 12v increasing to 14v when the engine is turned over.
Tested the green and white/blue wires in to the CDI as discribed in my manual which states there should be 3v or more, I'm only getting .03. It states that this is a failed signal generator, but as Sid pointed out to me if this is the case then why is the front plug sparking.So I've run out of ideas, and now I'm testing the wiring as per Sids advice but I need some more pointing incase this fails too.
Plus I would like to say if this don't get sorted I ain't coming to the AR :(
wyrdness
27-06-07, 03:39 PM
Broken / damaged HT lead? Have you tried swapping it with one from the other SV?
this is spooky
http://forums.sv650.org/showthread.php?t=92199
i just cleaned all the connectors i could see
Broken / damaged HT lead? Have you tried swapping it with one from the other SV?
As in step2 the whole coil was swapped.
In a continuation from this thread (http://forums.sv650.org/showthread.php?t=91918) I have been working on Helga most of today, mainly to get her ready for the AR but also to find out why the hell I have no rear cylinder spark.
Now this is what I have done so far...
Replaced the spark plugs and tested them for a spark on my other SV.
Tested and swapped the coils from the other SV.
Swapped the CDI from the other SV.
Take the other SV instead...job done.
Ceri JC
27-06-07, 03:46 PM
You have PM.
OK, rain has stopped play and now I'm not getting any spark anywhere. Back to the manual.
Take the other SV instead...job done.
I would but its not ready yet, yes its running but it has no MOT or tax. Plus it needs another week of work to get it to riding standard.
You have PM.
Thanks for the offer...
I cant help with your problem Grinch but you better come as I have packed the Mokos now and as they are at the bottom I cant be bothered to unpack them now! :rolleyes: :lol:
Tested the green and white/blue wires in to the CDI as discribed in my manual which states there should be 3v or more, I'm only getting .03. It states that this is a failed signal generator, but as Sid pointed out to me if this is the case then why is the front plug sparking.Well it looks like now I have no sparks anywhere so it looks more and more like its the signal generator, which in turn I will need me to drop all the oil out of the SV (the signal generator is behind the alternator cover). Now I want to be sure of this as if I use the spare I'm going to have to drop the oil out of both SVs.
Sid Squid
27-06-07, 05:03 PM
You don't need to drop the oil out, if you have the bike upright - on a stand for instance, a bit will spill but you'll only require a top up when you're done.
Alternatively lay it on the grass/a blanket/etc and none will be lost.
Well I'll be giving that a go tomorrow as long as the weather hopefully holds out.
So the conclusion at the moment is the signal generator or the loom. The signal gen I can swap but the loom is going to be hard as I have wired the alarm into it. So I will just have to pull the whole lot out and check it all.
I would work my **** off and get the other SV working but I have only one bolt on the front exhaust, and it ain't coming out with out some serious graft. So at the moment it would never pass a MOT, as the last job was to trailer it up to a mate to mig a leaver on to the bolt to work it off. Unless anyone knows another trick?
There is about 10mm of bolt shaft clear from the front cylinder, I was thinking of getting the bike up to temp, spray with plus gas and then working at it with some mole grips.
dirtydog
28-06-07, 06:33 AM
I managed to get a completely knackered and snapped stud out using some mole grips
I managed to get a completely knackered and snapped stud out using some mole grips
Cheers that's given me a little hope. ;)
Well its running, fired her up and both cylinders got hot. But then I notice oil seaping out, which I supect is where the gasget tore. To make it worse I tore the gasget on the other bike too, they just seemed to stick to the casing. In my frustration to get it sealed I have sheered the nut off, bugger.
So I'm going to have to drill that out, good job I have spares. Though I can't get a gasget till tomorrow as no one local has any gasgets in stock, so I'm going to have a busy morning tomorrow.
Once again a last minute rush to get it all done. It's putting a lot of dought in my mind about going now, as it seems like everything is set against me. I want to say stuff it and go and drink some beer at home and maybe go and watch Pirates of the Carabeian.
You can make a decent gasket from a cornflakes packet or using instant gasket. You've come this far and made it work, seems a shame not to push to get the last thing done;)
dizzyblonde
28-06-07, 12:17 PM
join the club. matt sat in three hour exam at mo. he had probs with raptor. balanced throttle wotsits, changed spark caps..to no avail and then noticed..no gaskets. when he bought it they tried to put an exhaust system on that wouldn't go, so put back on the original system ..badly. So gasket on this aft and toes and fingers crossed it magically makes things better. pain in the ****. but at least theres suzy as back up..famous last words!!!
454697819
28-06-07, 12:29 PM
B&Q - black silicone sealant
as good as any gasket...
Cornflakes! Well I've spoke to Sid and he said don't worry about it, just get some Hylomar Universal Blue and seal it best up. The bolts are there for to keep the casing on rather then keep sealed as there is no oil preasure.
Cornflakes!
No Cereal packets in the Grinch household then... I suppose Hymo is the correct thing to use.....:rolleyes:
northwind
28-06-07, 01:29 PM
Cornflakes! Well I've spoke to Sid and he said don't worry about it, just get some Hylomar Universal Blue and seal it best up. The bolts are there for to keep the casing on rather then keep sealed as there is no oil preasure.
Universal blue's great, last year both my engine covers and my water pump were held on with it. The more observant may have noticed that I was blowing coolant any time I got above 9000rpm though :rolleyes: But that was user error. It'll sort you.
And well done :thumbsup: You shall go to the ball. Hey, do you want that undertray? I finally removed it last week. It's a state, but if you can plastic weld it'd fix...
Great, the undertray would be lovely what ever state it is in. Ta.
Been out on the bike to get the rear tyre swapped and there is a little bit of oil at the bottem but nothing major, probably left over from the removal.
northwind
28-06-07, 11:16 PM
I was going to see about bringing it with me tomorrow but I think that might be pushing my loading capacities :) But I'll post it to you after I get back.
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