Hi had my 749 on a optimate 4 over winter,I go to start up and after system check & fuel pump whurr ,press start button batt indicator goes straight to "lo" any clues or pointers b4 buying a new battery? cheers in advance
Had the same, just run a extra earth cable from your battery to your engine (bolt on vertical head), or buy the Exact Start extra battery cables, from forum member Exige ( Highly recommended ) Read here my problem. 999 not starting Vbat Lo - Ducati.ms - The Ultimate Ducati Forum http://ducatiforum.co.uk/threads/999-not-starting-vbat-lo.32307/
Stu, if you have a digital voltmeter it is easy to check if your battery is on its way out. Leave the battery off the optimate for a few hours for its voltage to settle then check the voltage at the battery terminals before switching anything on. If it reads anything less than 12.7v your battery is probably on its way to the battery recyclers. A new fully charged battery like yours should give out 12.8v - 13.1v depending on the ambient temp and hold that voltage for many days after being fully charged. Do not rely on the dash Voltmeter as that does not allow you to check the off load voltage of the battery. Warmer ambient temp means slightly higher voltage. If you don't have a digital voltmeter its time to get one, Halfords have a few but get one with a continuity tester, usually around £15 and upwards. If you don't already, try to get into the habit of starting the engine with the lights off - so many ignore this basic rule which could be the difference between a breakdown due to a discharged battery and a ride home
My 999 shows 11.9v then goes up to 12.2v with headight off but starts fine. Check your connections at the battery. The cable can corrode where its crimped to the battery connector.
A battery can show full charge but when put under load can fail, my son had one showing 12.8 and when under load ( pressing the starter) it dropped bellow 4 v. Steve
