how can i check my cdi box is ok? - SV650.org

30-06-07, 03:32 PM

?

Biker Biggles · 30-06-07, 04:49 PM

Substitution for a (borrowed)good one?
If you have one plug out you can check the coil by swapping front and rear.On a curvy I would also check continuity of the feed wires to the coils from the CDI as these can be affected by shorting in the loom at the known pinch points (Riders seat bolts and under the pillion seat)You will need a multitester.

Luckypants · 02-07-07, 01:28 PM

Hi matey

Forgive me if this has been covered elsewhere, but the possibilities of what killed your bike was discussed on the AE07 (missed you buddy).

When your bike hit the car, it sort of slid it's right side on the side of the car. From looking at the photos, it looks like the tail piece could have been hit right where the regulator / rectifier sits on the right side of the rear sub frame.

Have you checked this is OK? Running with a fecked Reg/Rec can fry your battery and electrics and could be the root of the problem?

Just a suggestion.

northwind · 02-07-07, 08:21 PM

Yep, trying to find a known good spare is the best bet. Personally I'd blame wiring before components but it's not unheard of.

Sid Squid · 03-07-07, 02:08 PM

SV ignition electronics are commendably reliable, check all wiring very carefully first, start with the common parts - if it's not firing on both cylinders then it's not going to be the parts specific to either one.

I'd be looking at supply first, is there battery voltage at both coils and the ignition unit?

Then read this: http://forums.sv650.org/showthread.php?t=69733

03-07-07, 02:51 PM

i have checked all the wires & cant see anything worn

i have a freind coming tomorrow to do some propper tests with a multimeter,
but i have not had any problems with it starting since it let me down last friday for the AE

Sid Squid · 03-07-07, 06:41 PM

Which further suggests the electronics themselves are OK - generally electronic things occupy one of two states:

1) Working.

2) Not working.

That's hardly definitive, but an intermittent fault is rarely electronic.

04-07-07, 05:07 PM

Quote:

Originally Posted by Sid Squid

Which further suggests the electronics themselves are OK - generally electronic things occupy one of two states:

1) Working.

2) Not working.

That's hardly definitive, but an intermittent fault is rarely electronic.

so what would you say an intermittent fault, could be caused by?

30-06-07, 03:32 PM	#1
hovis Guest Posts: n/a	how can i check my cdi box is ok? ?

30-06-07, 04:49 PM	#2
Biker Biggles Member Mega Poster Join Date: Jan 2005 Location: Barnet Herts Posts: 5,069	Re: how can i check my cdi box is ok? Substitution for a (borrowed)good one? If you have one plug out you can check the coil by swapping front and rear.On a curvy I would also check continuity of the feed wires to the coils from the CDI as these can be affected by shorting in the loom at the known pinch points (Riders seat bolts and under the pillion seat)You will need a multitester. __________________ On a clear day we stand there and look further than the ordinary eye can see.

02-07-07, 01:28 PM	#3
Luckypants Moderator Mega Poster Join Date: Jul 2003 Location: Nr Ruthin Posts: 7,056	Re: how can i check my cdi box is ok? Hi matey Forgive me if this has been covered elsewhere, but the possibilities of what killed your bike was discussed on the AE07 (missed you buddy). When your bike hit the car, it sort of slid it's right side on the side of the car. From looking at the photos, it looks like the tail piece could have been hit right where the regulator / rectifier sits on the right side of the rear sub frame. Have you checked this is OK? Running with a fecked Reg/Rec can fry your battery and electrics and could be the root of the problem? Just a suggestion. __________________ "Your Viffer sounds like it is raising hell! Spot on." - Witchery 17/4/08 Snow Plough Appreciation Society - Member #3

02-07-07, 08:21 PM	#4
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Re: how can i check my cdi box is ok? Yep, trying to find a known good spare is the best bet. Personally I'd blame wiring before components but it's not unheard of. __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

03-07-07, 02:08 PM	#5
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: how can i check my cdi box is ok? SV ignition electronics are commendably reliable, check all wiring very carefully first, start with the common parts - if it's not firing on both cylinders then it's not going to be the parts specific to either one. I'd be looking at supply first, is there battery voltage at both coils and the ignition unit? Then read this: http://forums.sv650.org/showthread.php?t=69733 __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

03-07-07, 02:51 PM	#6
hovis Guest Posts: n/a	Re: how can i check my cdi box is ok? i have checked all the wires & cant see anything worn i have a freind coming tomorrow to do some propper tests with a multimeter, but i have not had any problems with it starting since it let me down last friday for the AE

03-07-07, 06:41 PM	#7
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: how can i check my cdi box is ok? Which further suggests the electronics themselves are OK - generally electronic things occupy one of two states: 1) Working. 2) Not working. That's hardly definitive, but an intermittent fault is rarely electronic. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

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