Q for my DAD...

Originally Posted by Richie

Not so, this happen'd to my Aprilia when I first got her.
after we jump started it, took the cables off and she died... jumped her again, and same again when one lead was disconnected...
new battery fitted, all singing and dancing and happy me when out for a ride with big grin on face.

also , did you check the voltage at the battery with the bike running... ie 15Volts or at the regulator ?
if at the battery with the engine running then your battery is kaput.


hope you get the problem sorted soonest.
Richie

Ive checked the voltage at the battery with rec connected and not. Voltage at battery without was 11.5v and with 12.5v so there must be a connection... But why so LOW!? The battery is charged and has enough power to start and run the bike so it seems fine. This is doing my tree in tbh!

try it with your battery in, your battery is fine then you will know if its the battery or not?
if you havent tried it yet its worth trying? the battery might not be holding the charge.

Thanks for the input Sunshine. I think at the moment its running entirely off of the battery. It seems to be doing a decent job considering.

We (me and the old man) think it maybe the relay, well its more my dads idea, I somehow missed that... heh.

Ill let you know. Most of these electrical issues can effect any bike so it could help someone in the future if I give it closure

IMO just get a new battery, the thing is so important it's hardly worth messing with everything else for £40.

Well, what was the final diagnosis? Was it the battery or something else?

Curious as I have a 955i ST

No fault found as yet. Still got issues. Sigh. My old man is wondering if it might be the ECU. Im not sure, I guess it could be but it just dont sound right and other than the charge not getting from the rectifier to the battery its all running fine as far as I can tell!

So what you think, ECU could be the issue?

Does the connection between rectifier and battery go through the ECU?
If the answer is no check to see if theres a break between the rectifier and battery?
Is the charge definitely leaving the rectifier?

Surely if you check the current through the loom point to point before and after any fittings you can establish if its a break in a wire or a defective fitting. Getting confused here as I thought you had full current flow to the battery originally but now you say only to the rectifier.

How old is the battery that is currently fitted to the bike?

3 Year old battery. As far as I can tell its fine, hold the power well, when the bikes not using it all and cranks well.

Right to straighten out all the confusion I seem to have caused...

The battery is in. The voltage on the terminals with everything connected and battery fully charged is ~12.5V which is fine. With engine running it drops by ~0.5/1v. The rectifier is putting out ~15v at the connector (on the rectifier). I can trace both sides to the fuse that connects the rectifier to the battery. I there for guess that all wiring is fine as either one wouldnt get there if it wasnt. For some VERY odd and irritating reason the voltage doesn't appear to get across the fuse. Have changed fuse etc. Its annoying because as far as I can tell it "should" work absolutely fine!

The ECU thing is just my dad clutching at straws, for some odd reason he don't want to go to a shop, I guess I understand that upto a point, but we have a very good in independent shop near, he even knows the owner fairly well but still dont want to go there.

Guess I could short the fuse and see what voltage I get across the short with engine running. Oh and of-course the fuses seem 100% fine, pass resistance tests etc.

[yorkie_chris]

Ok get multimeter, stick one prod in back of live connector of regrec, other one on battery live.
Range on 20VDC.

If this is high, that wire is fault. Try same on earth.


I would get a known good type of regrec and wire direct to battery with high current cable and soldered fittings.