Project "Get Bonny riding to the BCF BBQ" - sv650

[c_dug]

Having issues with the SV that bonny is supposed to be borrowing this Friday for the BBQ.

It hadn't been run for a month or three, the battery was a gonner but I knew that already. We hooked it up with jump leads to my divvy and it fired up right away with no issues. Ran nicely.

Once it was running we disconnected the jump leads but it died straight away.

Since it died it hasn't started once, the SV battery is the same as the one fitted to the k5 gsxr1000, so we pinched the one out of the_godfathers bike to see if it made a difference but there was no change.

I dont have a spark plug spanner narrow enough to remove the plugs from the SV, but I tested both leads with a plug from my divvy and got no sparks from either cylinder. Unless there is something about the divvys spark plugs that means they wouldnt spark from the SV coils, im guessing there is an electronic issue somewhere along the line?

Any suggestions of what to check next?
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[P.]

What happens with the gsxr battery attached? Spins over nice and fast but no sparking?

[c_dug]

Yep exactly that.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Hetzer]

It sounds like you might have blown the coils.
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"There's the horizon! Ride hard, ride fast and cut down all who stand in your way!"

[P.]

If you can get over to Maidstone sharpish you can have the coils of my SV purely for the bbq, they are from the race bike so I will need them back, but possible there is an issue there somewhere other than the coils.

Remove tank/airbox and check wiring.

[G]

Kill switch circuit?

The kill switch stops the engine by grounding it out before it gets to the spark plug.

Check to see if there's power getting in to the coils.

Have you checked the fuses?

[nowhere.elysium]

[c_dug]

Theres no way I can get to maidstone today, busy all day. My plan is to book a day off this week and run through whatever is suggested in this thread.

Dead coils would be an issue, how would they have been killed though? How do I test them?

G, we did think about the killswitch, but with it flicked the engine doesnt even crank over. So I figured that if the switch was at fault the engine wouldnt even be spinning up.

Gerry, if there is no reason the sv coils shouldn't spark my divvy plugs then I think removing the sv plugs isnt necessary? Thanks for the offer though. Also I still have the milliput here for you.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[G]

Note that it may just be a relay/connection further down the line, rather than the kill switch it's self which is causing the problem.

Have you got a mulitmeter there?

[Hetzer]

[c_dug]

I have a fairly decent multimeter here so should be able to test what is needed, if I know what to do!
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[nowhere.elysium]

OK. I'd be looking at the ignition fuse, the kill switch part of the switchgear, and the state of the coils. I can't remember the appropriate impedance values off the top of my head, but I do have a printed copy of the factory service manual somewhere. Let me have a dig around.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[nowhere.elysium]

Did you want me to run the service manuals up to you? I can pick up the milliput in the process.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[Shaft]

[c_dug]

[Shaft]

If you can get that service manual from Gerry, there's probably a test procedure for the various parts of the ignition circuit, along with specific values.

Failing that, start with a good battery, check the main fuse, then test for continuity until you find the part with power going in and none coming out.
____________________
Things get better with age; I'm close to being magnificent........
20 RE Interceptor, 83 Z1100A3, 83 GS650 Katana
WooHoo, I'm a Man Point Millionaire! https://www.bikechatforums.com/viewtopic.php?t=234035

[G]

https://www.dropbox.com/s/r9qgbwqz4wbva6m/1st%20Gen%20Service%20Manual.zip

[jjdugen]

I'm going with the ECU being fried too, not a good idea to run without a battery !
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The CBR900RR has been sold. Aprilia Falco worms its way into my heart.
Try Soi 23 on Amazon for a good read.... Self promotion? Moi?

[c_dug]

Well, Mr. Elysium popped over earlier and had a look.

The coils are fine, the reg/rec is fine, generator is fine.

Looking more likely to be the CDI.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[nowhere.elysium]

I'm still suspicious of that sidestand switch.
____________________
'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[Shaft]

Doesn't the sidestand switch behave the same as the kill, ie it won't turn over if it's engaged?
____________________
Things get better with age; I'm close to being magnificent........
20 RE Interceptor, 83 Z1100A3, 83 GS650 Katana
WooHoo, I'm a Man Point Millionaire! https://www.bikechatforums.com/viewtopic.php?t=234035

[c_dug]

Thinking about it though would the sidestand switch make any difference in Neutral? Surely it would start and then cut out as soon as it was put in gear if it was the switch at play?

I've done some google-fu and it seems swapping the cdi is really the only way of testing it properly so I suppose I'll stump up for a unit from a breakers if thats the only way.

Annoyingly for such a common bike I dont know any curvey SV owners near by to play swapsies with!
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[P.]

I have one you are welcome to buy afraid you will need to drop to Maidstone and pick up sir. Can try starting my bike with yours before travelling back too.

[c_dug]

From a curvey? How much and can you do a week day this Week?
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[c_dug]

In fact I can pop down one evening so weekday isn't that important, maybe pm me order whatever.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.