I think you. Need to do some measurements, so you will know what is going on.
Measure that you have 12.8 Vdc at the solenoid battery terminal.
Measure the 'trigger' terminal on the solenoid when you push the starter button. Should be battery voltage within .1.
Measure the starter side of the solenoid when button pressed, should be less than batt voltage if the starter is turning. But you need to know what it is. (could be down to about 9Vdc).
Take it one step at a time and keep track. No use tossing parts at it until you know what is bad.
Another thought, take the starter side cable off the solenoid, press the start button, what voltage do you see with no load? Better be full battery voltage (minus perhaps .2V).
You could have two bad solenoids. If it is clicking, then it seems likely the 'trigger' part is fine, but see if you have full Volts at the starter side when activated.
You should also be able to jumper (with a large cable) from the Battery side of the solinoid to the starter side, and it will turn over.
Thats what I'd do anyway.
Mark
On May 5, 2012, at 7:37 AM, "Ian Ellison" <ian@ianellison.org.uk> wrote:
> Had another look at the ST2 (the one that won't turn over). I found a spare
> solenoid in my parts collection and substituted it. No difference. I used
> jump leads to replace the starter wires. No difference. I eliminated the
> right angled connector on the +ve battery terminal. Nada. I used a jump lead
> to provide an additional earth route from battery to motor. Nope. Tried with
> the original battery, another known good one, and the two in parallel. Same
> result.
>
> I then put everything back to normal and touched a jump lead from battery
> to starter and it turned over and fired right up. Motor sounds sweet anyway!
>
> So I have substituted everything from battery to starter post with the bike
> showing consistent behaviour, a healthy click from the solenoid but no
> turning over. Direct application of power to the starter makes it work.
> Shorting out the solenoid doesn't work.
>
> Is there anything else that inhibits the starter motor from turning over? I
> can't see a sidestand switch, I have tried pulling the clutch in (and in
> gear with the clutch in after Huss's message the other day.) I am totally
> baffled. Kill switch is in the Run position. Given it ran that has to be
> OK.
>
> I have checked all the connectors I can see - 2 2-wire waterproof connectors
> nder the tank, one red wire,one yellow, the big multiway near the fuse box,
> the rectangular one on the right near the battery. All look clean and in
> good condition.
>
> Anyone? Unless I have 2 bad solenoids, or a cable which displays high
> resistance under load but measures 0 ohms at rest I have no ideas left.
>
> Unless anyone can offer a brainwave my next move is to buy some new heavy
> duty starter cables and just replace everything in that circuit.
>
> Bah!
>
> IanE
>
>
>
>
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