Electrical failure - battery, regulator.

[Dave20046]

Originally Posted by Neeja

Yeah...you've got no battery charging going on there. A 12v battery isn't really 12v - it's a 12.7v cell. When you say after a few hours of charging, was this on an optimate type device? If so, was it saying that the battery is full? If so, the battery's dead, too - a fully working, freshly charged battery should be reading between 12.6 and 12.9v.

Ideally with the bike idling you want somewhere between 12.4v and 14v going to the battery, and when it's above 5krpm it should be running at 13.5-14.5v or so.

If you can get the bike running and get to the reg/rec, is it warm? The reg/rec changes electrical energy to heat to stop the battery from being overvolted, not undervolted. If it's hot, then it's shot - if it's cold, it'll probably be something else in the charging system as there's not enough voltage for it to regulate.

Cheers for that post neeja are you positive that 12.4 is an acceptable tick over voltage?
My bike has standing battery of 12.5-13v, idle of like 12.4 and revs around 14v. I thought the idle voltage was wrong (as per this thread http://forums.sv650.org/showthread.php?t=144579 )


Soz for the derail matt; as said above those readings suggest the charging system ain't working (as said) it should be between 14 and 15v at 5k revs.
I think the next step is to narrow down which component it is, luckily you have a curvy so the reg/rec's nice and accessible (remove ya rear pod plastics) you want to start the bike and disconnect the three plugs going into the regrec and put a multimeter (on ac IIRC) between 2 of the pins (then the next two then the next two so you've read the voltage between every terminal) and report back your readings. IIRC it needs to be 75v+ when revv'd

I've taken the battery and charged it until the indcator light on the charger came up full, and then a bit more for good measure.
cleaned up the connector pins too and from the reg/rec but they werent that bad to begin with. Reconnected everything and taken some more readings, unsure of if the lights were meant to be switched on or not I did it twice either way.

With lights off I get at idle a reading of 17.45V and at 6000 I get 17.79v at the battery.
with lights on I get at idle a reading of 12.75 and 13.02 at some rev's (but dont know what the Revs were at).

Just seen your post YC, gonna check the yellow wires tomorrow night.

[Dave20046]

Originally Posted by leedsmatt7

Just seen your post YC, gonna check the yellow wires tomorrow night.

The readings above might screw your battery mate. don't do it to much.

Follow YC's instructions

[yorkie_chris]

As I said in text your reg rec has almost serpently dug its own brain out with a spoon.

[Sid Squid]

Originally Posted by yorkie_chris

As I said in text your reg rec has almost serpently dug its own brain out with a spoon.

If the results in post No12 are accurate and reliable then this is almost certainly true.

Originally Posted by Dave20046

Cheers for that post neeja are you positive that 12.4 is an acceptable tick over voltage?
My bike has standing battery of 12.5-13v, idle of like 12.4 and revs around 14v. I thought the idle voltage was wrong (as per this thread http://forums.sv650.org/showthread.php?t=144579 )

Yep. Your readings sound pretty good. If the idle voltage being low bothers you, you can always swap your reg/rec out for a better one - swapping from an SV unit to a TL unit meant that his battery's pretty much got a constant 14v supply, regardless of revs. However, if it ain't broke, don't fix it. At 12.4v if you left the bike to idle for hours and hours and hours, you'd eventually wear the battery down...until it had a standing charge of about 12.4v. Which is fine to start the bike again to keep it going at 12.4v...

As for the OP, yes, that sounds like the reg/rec's gone, and your battery will probably boil a bit if you keep running the bike

Originally Posted by Neeja

As for the OP, yes, that sounds like the reg/rec's gone, and your battery will probably boil a bit if you keep running the bike

Boiling battery between my legs... Na I'll be using the pointy for a while it seems.

[Dave20046]

Originally Posted by Neeja

Yep. Your readings sound pretty good. If the idle voltage being low bothers you, you can always swap your reg/rec out for a better one - swapping from an SV unit to a TL unit meant that his battery's pretty much got a constant 14v supply, regardless of revs. However, if it ain't broke, don't fix it. At 12.4v if you left the bike to idle for hours and hours and hours, you'd eventually wear the battery down...until it had a standing charge of about 12.4v. Which is fine to start the bike again to keep it going at 12.4v...

As for the OP, yes, that sounds like the reg/rec's gone, and your battery will probably boil a bit if you keep running the bike

cheers m'lord.
Hot grips cut out at idle but I can live with that.

1 No. 2008 CBR600 RR Regulator Rectifier Ordered. Not too bad either, £40 plus postage