Weird fault on SV at work this week. - SV650.org

04-07-10, 07:42 PM

A few weeks ago we sold this nice bloke and his missus a blue SV650 K9 that was immaculate, and within 2 weeks he'd dropped it quite heavily on the right side, with no crash bungs. Damage wasn't too severe and mainly cosmetic - very nasty scrapes all the way up both parts of the fairing, broken front brake lever and scraped can etc. The guy put a new brake lever on and continued to ride it as structurally it's safe and straight.

This week he phones us up because the bike won't start, it's completely dead. He was negotiating a roundabout when the bike died and there was zero electrics, Turning the key produces nothing, no dash lights... bugger all. Our mechanic went straight to the fusebox and replaced the 30A fuse, which immediately blew in a rather explosive fashion. Right, something has a direct short to earth, so further investigation is started. After unplugging this, testing that, sticking a multimeter on the other he finds the cause.

When matey had dropped the bike it shunted the fairing over a fair way, which in turn shunted part of the wiring loom over, which fretted on the coil bracket and resulted in the reg/rec cables shorting out and being fried about 30mm from the reg/rec itself. He managed to rework the cables and insulated them properly and then checked the reg/rec static readings with a multimeter... and it's fine. So plonked it all back together and did the usual charging checks with the engine running and it's back to normal.

Just one to bear in mind if you get the same on a pointy that's been slid heavily on the right side

muzikill · 04-07-10, 08:08 PM

same thing happened to me (kinda) fuse kept blowing and bike immobiliser would kick in, found out that the alarm loom had shorted against the bike due to vibration (when i checked the rear frame for the seat i found it to be raggy edged) p*ss poor it should have been filed down at the factory when made. Probably still the same with all of the pointys (worth checking if you do a strip down)

Cable was covered in tape to stop it happening again.

04-07-10, 07:42 PM	#1
Lozzo Guest Posts: n/a	Weird fault on SV at work this week. A few weeks ago we sold this nice bloke and his missus a blue SV650 K9 that was immaculate, and within 2 weeks he'd dropped it quite heavily on the right side, with no crash bungs. Damage wasn't too severe and mainly cosmetic - very nasty scrapes all the way up both parts of the fairing, broken front brake lever and scraped can etc. The guy put a new brake lever on and continued to ride it as structurally it's safe and straight. This week he phones us up because the bike won't start, it's completely dead. He was negotiating a roundabout when the bike died and there was zero electrics, Turning the key produces nothing, no dash lights... bugger all. Our mechanic went straight to the fusebox and replaced the 30A fuse, which immediately blew in a rather explosive fashion. Right, something has a direct short to earth, so further investigation is started. After unplugging this, testing that, sticking a multimeter on the other he finds the cause. When matey had dropped the bike it shunted the fairing over a fair way, which in turn shunted part of the wiring loom over, which fretted on the coil bracket and resulted in the reg/rec cables shorting out and being fried about 30mm from the reg/rec itself. He managed to rework the cables and insulated them properly and then checked the reg/rec static readings with a multimeter... and it's fine. So plonked it all back together and did the usual charging checks with the engine running and it's back to normal. Just one to bear in mind if you get the same on a pointy that's been slid heavily on the right side

04-07-10, 08:08 PM	#2
muzikill Member Mega Poster Join Date: Jul 2005 Location: Dunfermline Posts: 1,712	Re: Weird fault on SV at work this week. same thing happened to me (kinda) fuse kept blowing and bike immobiliser would kick in, found out that the alarm loom had shorted against the bike due to vibration (when i checked the rear frame for the seat i found it to be raggy edged) p*ss poor it should have been filed down at the factory when made. Probably still the same with all of the pointys (worth checking if you do a strip down) Cable was covered in tape to stop it happening again. __________________ Learn to maintain your bike, take it apart, rebuild the engine & more (using better bolts ), drop it & fix it again! K3 Job c.v: Engine:remove/split/rebuild/refit. Replace:Gearbox,Fuel pump,Gaskets. Piston clean,rings. Overhaul:Throttle body,Injectors,Brakes,Forks. Remove/refit:Exhaust,Radiator,Oil cooler,Throttle,Air filter,Tank. Replace: Oil,Coolant,grease,brake hoses & bleed.

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