ST1100 Charging issues.

[R1stu]

Is there anyone near to Southampton that can come and give me a hand before I scrap the bike?

I cannot tell for the life fatham why my battery is not charging. I have done the checks from the Haynes manual testing all the yellows from the alternator, testing the black and white wire, and I think they are correct.

The RR test in the haynes makes no sense to me. I have tried 3 regulators 2 standard ones and a brand new electrix one that I paid £100 for and nothing.


People are saying the starter solenoid has nothing to do with the charging circuit, yet the wiring diagrams show power coming from the RR through this. Prev also when the fuse was missing from the starter the bike did not charge.

HELP!!!!!
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Carbon closet tart! https://www.bikepics.com/members/r6stuk/02r6/
Stolen bike. 2000 R1: https://www.bikepics.com/members/r6stuk/00r1/
Current bike 1991 Honda ST1100 Pan European, 1986 Honda cb350sg (Finished)

[Nobby the Bastard]

It's routed through the starter solenoid or the RR and starter solenoid share a connection to the battery?

I can see it being routed throught the fuse but power only goes through the solenoid when the starter is active.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[WD Forte]

I see the 91 has a typical stator/rotor charging system which looks like an alternator but aint
I thin it was 96 ish onwards they started to use 'proper' alternators.

tests are done as most bike charging systems
ie stator windings, then Rectifer diode tests then Regulation.

I suspect the main problem is you don't fully understand what you're doing, why and how to do it.
Southampton is a bit of trot for me but any half decent bike electrician
you can find locally should be able to pin down the fault pretty quickly.
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bikers smell of wee

[A100man]

[WD Forte]

Bikes usually have a 3 phase AC generator on the crank
this is basically 3 sets of coils and permanent magnets whizzing around
it which produces AC power.

This AC power goes out to the Rectifier/Regulator (RR for short)
where diodes in the rectumfrier turn it to DC as yet unregulated.

This unregulated voltage may well be a far higher voltage than the bike/battery needs so needs to be regulated to usually close to 14V
This is usually done internally to the RR by shunting excess power to ground hence the need for fins to dissipate the heat produced.
so basically, wasting some of the power produced by the stator

'Proper' alternators like you'll find on most cars do it all internally
they generate, rectify and regulate and give out a steady DC voltage
of around 14V to power the electrics while keeping the battery charged.

They don't use permanent magnets which produce a fixed output like a bike stator which produces power whether it's needed or not
but have field coils which can be altered in response to demand ( load)
by altering the magnetic field strength.

This makes them more efficient as they can put less load on an engine
when demand is low (battery full charged, sunny day, no lights or heated grips on etc)

that earlier ST has what initially looks like an alternator but
closer inspection shows it has no slip rings brushes or diode pack
and regulator like a pukka alternator.
It's just a fancy pants faggoty assed external stator setup
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bikers smell of wee

[sickpup]

The battery connects directly to the Starter relay where the main fuse is, 30 or 40 amp. Power is distributed from the start relay to every other system on the bike and the charge system DOES go through the starter relay.

There is a relatively common problem where internal corrosion of the starter relay, the pot is the wrong way up fills with water from either rain or condensation and causes resistance in the charging circuit.
As a work around you can connect the RR output direct to the battery just fuse the live with the same rating fuse as the bikes main fuse, this bypasses the starter relay but if it is the problem you will need to change the starter relay eventually preferably before it fails closed circuit.

[A100man]

Could the battery itself be nadgered and not taking charge?
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[sickpup]

[R1stu]

[sickpup]