Well thank you gentlemen for your help and advice.
BUT the mystery has deepened (well for me anyway)
Took the fully charged battery down to the test centre fitted and pressed the starter hoping.
The result well none the fault was as before.
Decided to van the bike back home.
Remove filter checked the butterfly's general look around nothing untoward.
Tried starting the engine same fault as before.
Had some easy start so although I don't really like it thought it might give an indication as to where the fault might lie.
So engine cranking on the button I spray the intakes she tries to fire more spray the engine tries harder just about to stop and suddenly the engine starts to pick up and then run perfectly?????.
Have restarted the bike a dozen times now with no problems idles nicely picks up fine.
I call a motor engineer friend. Ask do you think it's the injectors, should I clean them.
After some discussions he feels leaving the key in and trying to start on low Battery might have upset the electronics.
Getting the engine running has realigned said electronics.
I don't really know but he is a very good and experienced engineer.
What think you?
Once again thanks for the help
Bill.
--- In st2_owners@yahoogroups.com, sampsons <sampsons@...> wrote:
>
> Hi Bill
>
> You may have a split fuel hose inside the tank and be losing pressure
> in the fuel system. Open your fuel cap and turn on the ignition, and
> look for excessive movement in the tank, or fuel spraying if you have
> less than half a tank of fuel.
>
> Has happen to me before.
>
> Darryl
> 2004 ST4s
> 2003 ST3
> 400 ss Junior
>
> On 4/06/2011 9:02 AM, will_go4s wrote:
> >
> > ST4s 2002.
> >
> > Bikes been running fine been several runs of 200miles,
> > Time to go for its MOT (road Safety test).
> > Starts fine out of my garage run nicely down to the where it's going
> > to be tested. 4mile
> >
> > At end of test the engineer tried to start the engine it turned over
> > ok but didn't fire.
> > He tried several times.
> > Then I remember he had had the key in all the time testing lights etc.
> > Removed ignition key, waited a minute put it back in then tried to
> > start the engine.
> >
> > On the first press of starter button engine turned over then fired for
> > about 4cycles then cut out.
> > Successive retries with starter only turned over the engine with out
> > it firing.
> > Switch off ignition removed key waited a couple of minutes and retried
> > as before that is
> > Engine turned over then fired for 3-4 cycles then cut out. And would
> > then turn over but not fire at all. Until it was switched off for a
> > few minutes.
> > These starts were done with the fast idle/cold start lever set mostly
> > mid way but did try with it in all positions
> > Bleeping the throttle had no effect the engine it just stopped after
> > its 3-4 cycles.
> > This pattern repeated a number of times decided to put battery on
> > charge for a bit 1/2hr.
> > Tried again the same pattern.
> > The fuel pump runs up when the ignition key is turned on. The battery
> > is under a year old. All joints etc., were checked and cleaned before
> > winter lay up.
> > Tried with battery coupled to a car battery. The same pattern.
> > The bikes been left in the dealers over night and I have removed the
> > battery to charge it.
> > Will try to start with hopefully a fully charged battery in morning,
> > but have a feeling that the battery may not be the problem. As once
> > the engine fires it should keep running?
> >
> > Any help or ideas would be most welcome
> >
> > Bill
> >
> >
>
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