Breakdown!! - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 8 (permalink) Old May 21st, 2019, 2:33 am Thread Starter
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Breakdown!!

Hi all,

had my Paul Smart out for the second decent run of the year and it broke down!! was running great then as I slowed for a roundabout and pulled clutch it stalled but refired quite easily. i thought the indicator idiot lamp looked a bit dim. about five minutes later it started mis-firing which got progressively worse until the engine management light came on and it rolled to a stop.

recharged the battery and it fires and runs beautifully. this is where I am confused. pust a multimeter onto the battery and recorded the following:

1. ignition off 12.8v
2. ignition on 12.4v
3. running 12.2v. (** i'm convinced this was 13.5v before bike got upto temperature - going to check again tonight)
4. tacho bounces when bike gets upto temp (50 deg on clock) - found a nick in a green with brown stripe wire.

all useful comments welcome

thanks in advance

Barry
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post #2 of 8 (permalink) Old May 21st, 2019, 6:14 am
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Quote:
Originally Posted by Charliecraig1 View Post
Hi all,

had my Paul Smart out for the second decent run of the year and it broke down!! was running great then as I slowed for a roundabout and pulled clutch it stalled but refired quite easily. i thought the indicator idiot lamp looked a bit dim. about five minutes later it started mis-firing which got progressively worse until the engine management light came on and it rolled to a stop.

recharged the battery and it fires and runs beautifully. this is where I am confused. pust a multimeter onto the battery and recorded the following:

1. ignition off 12.8v
2. ignition on 12.4v
3. running 12.2v. (** i'm convinced this was 13.5v before bike got upto temperature - going to check again tonight)
4. tacho bounces when bike gets upto temp (50 deg on clock) - found a nick in a green with brown stripe wire.

all useful comments welcome

thanks in advance

Barry
Sounds as though it's not charging the battery, so perhaps a new regulator/rectifier would be in order.
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post #3 of 8 (permalink) Old May 21st, 2019, 12:41 pm
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Originally Posted by Old rider View Post
Sounds as though it's not charging the battery, so perhaps a new regulator/rectifier would be in order.
'sounds similar to when my regulator/rectifier went belly up.
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post #4 of 8 (permalink) Old May 21st, 2019, 3:57 pm
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Follow the standard tests for the rectifier/regulator. If that tests okay, then next test is for stator output.
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post #5 of 8 (permalink) Old May 22nd, 2019, 4:20 am Thread Starter
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Tested battery ok. Tested battery at leads when running and was only 12.2. Checked stator output and was reading high (expected). New regulator ordered.

Thanks all

Barry
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post #6 of 8 (permalink) Old May 23rd, 2019, 5:36 pm
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Originally Posted by Charliecraig1 View Post
New regulator ordered.
I see you're pretty new here, did you order a MOSFET unit to ensure future reliability?

Hi, my name is Jeff, and I'm a Ducatiholic.
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post #7 of 8 (permalink) Old May 24th, 2019, 12:28 pm Thread Starter
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Breakdown

Hi Jeff

Yes. Did quite a bit of reading up and went with the Electrex World unit which will be fitted this evening.

Regards

Barry
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post #8 of 8 (permalink) Old May 28th, 2019, 5:13 pm Thread Starter
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Hi all,

Electrex world unit fitted easily in five minutes. Bike running perfectly.

Also discovered that my loom had melted slightly where it had touched the original rectifier slightly - repaired one wire which has fixed my dodgy tacho - result.

Regards

Barry
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