Eek! I\'ve killed my electrics. Red goes to Black ....
 

Can anyone help? I did something unforgivable and jumped the dead battery on my '93 SS 750 with the leads to the wrong terminal! I thought there might be a problem when the start switch welded on! It blew the fuse and after mending the switch I crossed my fingers ... but it promtly blew another fuse and another till I come to the conclusion that I'd f@cked it. So I wonder does anyone have a clue before I send in a SORN? I'm skint and can't afford the loving hands of my guru Motori de Marino :rolleye:

Hard luck Kefi....

My electrical knowledge aint that good I'm afraid but I would look towards the starter solenoid mounted on the right hand side near the battery box (if yours is the same as my 93 900ss).

The haynes manual details how to test it.

I'd of thought this unit plus the fuse would of stopped too much damage but you might be as well checking your charging system voltage (when you get everything running again - lets be positive (oops - sorry)).

You wouldnt want to melt a battery like I did recently :mad:

Good luck - Frank

Is there a big 30A or 40A alternator fuse as well? If so, I'd check that.

You might find some help here..

http://www.ducati.ms/ubbthreads/show...b=5&o=0&fpart=

This guy did the same thing.. Hope you get it fixed.

ATB

Good weblink...you need to join to read the thread...and its easy and worth it to join....

Here is a reply from Edwyun....what a good guy...he's everywhere :saint:

this exact thing happened to a friend of mine at a trackday on his 851. Like ward said, check/replace the regulator. IMHO, i'd use a OEM updated R/R (3-phase type; just don't use the extra yellow wire).

Ride safe,
Edward
900FE (#231)

What a fantastic response! Thanks you guys I'll take a look later and get back to you. Many thanks!
Ken

Shame I can't pick up the thread posted by the guy from Winborne but I'll get started and perhaps the webmaster will sort that one for me. Cheers again ...

have a good look at most of the rubber jacket around the wire. its possible it may have burnt and you will now be getting a short-circuit. if it got hot enough to weld the ignition barrel it could of burnt through else where.

I accidentally connected battery wrong way round when bike was in bits & wanted to stop alarm from being discharged. Result was a fried regulator & the 40A fuse blew. replaced regulator & fuse & all OK.

UuuFippinReekaakaa! The Duchess Lives! I found a bare wire by the starter relay (probably melted the insulation and shorting on the mount). Anyway fixed that and replaced the 15 amp fuse, charged the battery and bosh.
Immense gratitude to you all for the support. I'm well chuffed, thanks! I hope it's sunny tomorrow...:bouncy:

thats what its all about m8
great club
great peeps
great advice

isn't it nice to be able to fix something without having to pay someone £40 just to look at it.
Good work mate.
Don't get me wrong professional work shops have a time and place.
but when money is tight.
Glad we could help

Definately! Electrics always scare me so I probably would have left it till I could afford a professional. As it was it was a basic bit of detective work inspired by all your posts. Very empowering.

Well done Kefi - no probs.

BUT !!! Please check what voltage your battery is seeing etc in case your regulator/rectifier (RR) has seen some damage.

Then let her RIP !!! :devil:

Frank

Thanks Frank! Is that something covered in the Haines?

Now I'm being lazy! I'll check my Haines Manual in the morning before I blow out some cobwebs. BTW I read somewhere that the cure for fouling plugs on the 750 was something to do with carb needles. Or is that another thread?!
Cheers you guys
Ken

Yep - Its covered in the Haynes, needs to be able to have bike running from memory.

Plug fouling..dunno about 750 - always worth check grade of plug as there are variations between different manufactuers grades.
I had good success with a NGK Iridium plugs until one went bad :puzzled:
Checkin gthe needle heights is a good plan but a bit of a pain as it entails removing the airbox etc etc etc etc etc etc :barfy:
Choked air filter might be a suspect as well.

Good luck

Thanks mate. I heard the needles go oval in time which screws the mixture... Maybe I'll start a thread but I'll search first. Going off line now...

yep - I have heard of 'ovaling' - overhauled my 900ss carbs at 14,000 mls and the needles were fine.

Again - dunno about the 750 but the 900ss uses the same basic carb as a Y*m*h* TRX850......hint, hint.

This

is what happens to the emulsion tubes in carbed Ducatis.

Darren

And here is some diagnostics you might find useful as well:

http://www.electrexusa.com/electrex_fault_finding.html

Good luck !!!

Nice one Darren - I had a link to the factory Pro website and deleted the swine by accident !!!

Forget that though...time to order up them flatsides :D

Thanks Frank 'n Darren. Definately got to look into it as even with a clean filter she never get's much beyond charcoal even after a fast run. One trip round town and I'll need to clean the plugs. In the summer I renamed her Tamagochi after the toy that needs to be loved and tended constantly! Still we do don't we ...

Or maybe like riding an old radio. Takes five minutes to warm up but when it does the sound's great!

Hmmmm...full service and Dyno / Dynojet session meybe ???

From Chris Kelley? £420 plus postage and whatever customs charges you get hit for... Bargain...

Darren

you know - I always wondered about getting some flatsides from something like an IL4 and seeing if they would break-up ok :devil:

What's a flatside?

flatside carburettor

OK, thanks

Here's some more info from Chris Kelley of California Cycleworks fame.

Frank, there was pair of FCRs on fleabay yesterday that came from a rack of 4. From the guys spiel it appears that he bought them and split them himself to fit a twin. It'd probably be considerably cheaper if you could do the work yourself but I guess once you'd added up the cost of the specialized fittings, machining and rejetting there wouldn't be that much of a saving.

Darren

Yes, as mentioned above, do check out your regulator; you'd be lucky if it's survived unscathed. Get the engine warm and put a multi-meter across the battery terminals. Make sure it's set to the 0-20V DC range. YTou should be seeing arounfd the 14V mark. If it never gets up above about 13V, regardless of engine speed, or if it can increase to over 15V, then I'd say your reg/rect was clapped.

Remember a brand-new and fully charged battery will start the bike and run the engine without a rectifier (or indeed a alternator). You wouldn't get far before it died on you, though.

Thanks moto
I did take a little run on it today. The Haines manual said that varying output from the lights would indicate a duff reg and as I don't have a meter to test it and the lights were stable I reckoned it was probably ok. Did about a 5 mile blat and put it back in the garage as the weather was changing. Mmm... I could have been lucky to get home! I'll see if I can scrounge a meter befor I venture out again. Thanks so much for your input.

Just in case Kefi - I hope this isnt needed by you (or me :barfy:).....

Regulator Rectifier for Ducati motorcycles: £35 start bid

http://cgi.ebay.co.uk/ws/eBayISAPI.d...6134 589&rd=1

the rectifier in the pic looks like an old one and not one of the 2(?) updated ones for the carbed SS bikes.

It's been truly gratifying to see such response. I wouldn't have imagined so much input. I'm gonna get it checked with a multimeter this week and hopefully armed with all your advise make the best of it. Cheers you Boyz!:burn:

All part of the spirit within the DSC :)

Good luck