Engine starting issues - Page 2 - Ducati Scrambler Forum
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post #11 of 13 (permalink) Old 08-31-2016, 05:21 AM
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Originally Posted by MisterStrudel View Post
Confused @soakes - what correlation does a fully charged battery have to do with the starter sprag clutch failing? While I do not actively trickle charge my battery, the bike is ridden five out of seven days a week - battery is healthy and charged. Can you confirm what you mean?
If the battery isn't up to scratch the engine will turn over more slowly with the effect that it doesn't gain enough momentum. So that when it fires the ignition pushes the engine backwards against it's normal rotation, usually with a very loud "Clack" noise. This backfiring has a detrimental effect on the sprague clutch.

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post #12 of 13 (permalink) Old 08-31-2016, 07:15 AM
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And also,

The relevance would be that a strong battery would provide a quicker spin up with more torque than that of a weak battery.

A weak battery would tend to provide less grunt to lock the sprag and it would be more prone to slip.

It's a bit like hitting the nail on the head with a big hammer, rather than glancing off the nail with a watchmakers hammer,,,,,

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Last edited by rider; 08-31-2016 at 07:21 AM.
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post #13 of 13 (permalink) Old 09-01-2016, 07:52 AM Thread Starter
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@Derek @rider - thanks for that information. I did not realise that was the case.

I just put the multimeter on the bike and ignition off the battery sits at 12.75V, on ignition the battery dips momentarily to 11.8V and straight back up. Based on these results, I am comfortable ruling out the battery.

It is off the dealer in 12 hours so we will see what they have to say for themselves.

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