Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Sport Touring: ST4 / ST3 / ST2 > battery power

[skidlids]

I'd try shorting out/bypassing the starter solinoid and see how quickly it turns over then,

As Martini says it could be high resistance which could be down to a well worn solinoid, which in effect is a metal busbar that shorts the two studs together that the battery cable and starter motor cables are connected to
and with the current drawn involved it causes an arc which over time causes the surface to become pitted and carbonised, hence becoming a poor (high resistance) connection

Also to be considered are the stte of the Starter motor brushes and the condition of the Starter motor idler gear pinion which as Bradders found out can cause big problemswhen starting

[Glyn]

thanks for all the helpfull advice
so far ive done nought, as ive been striping calipers doing timing belts de dusting clutch and generaly spring cleaning. been at it two weeks!!
any ways i was putting it away tonight after some more feteling and she wouldn't start at all. long story short i found a nearly broken wire on the alarm where it disapears back into the loom near the battery, fixed this and she starts better than ever, turned over perfectly.
is this just coincedence ? could a poor conection on an alarm have this effect?

[twpd]

Maybe. But broken wires tend not to cause battery drain. It could conceivably cause starting probs if it's part of the immobiliser circuit.