Had a breakdown today. Caught on camera. Any thoughts folks?

[Molly]

Hi folks. 

TT fortnight is getting underway here in the Isle of Man this weekend. With perfect timing my bike's decided to die.... Would you be so good as to watch this short video and see if you've any idea what's gone wrong? Thank you in advance. Much appreciated. 

 

 

[pete roper]

Yer battery’s gone flat because your regulator rectifier has shat itself.

[gstallons]

Pete is probably correct . I assume you got it back home .  

1 charge the battery and pull each fuse to make sure of their condition and no blades show blistering from poor connections . If so ,repair and replace

2 disconnect the voltage regulator and connect a DVOM set on the AC scale . Connect this to the two large yellow wires coming out of the engine case and start the bike . Check the AC output at idle and then high idle . The v output may be 80v or something like that . If it is good , install a new regulator and use insulated butt connectors to get a GOOD connection . 

 3 when you are finished. Start the bike and check the charging system. 

 4 Moto Guzzi does not make good EV bikes

[p6x]

That rattling noise we hear when you attempt to restart indicates a current intensity drop, which confirms an electrical issue.

On a different note, I had some electrical issues with my V11, including the starter shorting internally (documented with photos), but once you have sorted them for good, then the Guzzi is a rock.

 

Edited May 25 by p6x

[Molly]

Thank you chaps. Monaco GP just finished so heading to the shed to follow your guidance. I did put it on charge for a while and it started fine so that was a relief. 

Expensive weekend. The boy's kart is in bits right now and needs parts... 

Thank you again. 

I'll just add this pic from earlier today. Met my bike's brother from another mother...

[docc]

Once restarted, also check that the tach is not erratic and the headlamps/brake light/horn work. This fault combination indicates a bad Relay #2 which also supplies the reference voltage for the charging system.

[LowRyter]

Those regulators aren't the greatest.   And the stator might go because of it.  Don't ask me how I know that.

[gstallons]

This is not just for you but for everyone : any charging system is not meant to charge a completely discharged battery. Recharge the battery before working on a bad charging system. 

[gstallons]

Remember , we are nowhere near you or your motorcycle . All we give you is our opinion . It is up to you to figure out what needs to be done.

[Molly]

Hi guys. 

Thank you again for the guidance. Here's an embarrassing admission. Just looked in on the bike and noticed the battery had yet to reach full charge (Optimate connected to pigtail). Upon inspection noticed the negative terminal had become very loose. I'm now hoping that this 'Mechanic 101' error / oversight is to blame. I'll still follow your guidance as it's all learning, but I've fingers crossed for an easy fix... 

:-)

[Tomchri]

Make a good ground cable from regulator to the engine while your having a little inspection. More options available if desired .

Cheers Tom.

[p6x]

8 hours ago, Molly said:

Thank you chaps. Monaco GP just finished so heading to the shed to follow your guidance. I did put it on charge for a while and it started fine so that was a relief. 

Expensive weekend. The boy's kart is in bits right now and needs parts... 

Thank you again. 

I'll just add this pic from earlier today. Met my bike's brother from another mother...

I know the feeling....

This is what happens in Monaco on F1 GP.... I have been there once... my dream? driving my Le Mans to l'hôtel de Paris, and handing the key to the jockey to park it....

 

[Molly]

30 amp fuse melted to a green plastic blob... More investigation underway. 

 

[pete roper]

Check the connectors from the reg-rec. Good chance you’ll find them melted.

[Molly]

35 minutes ago, pete roper said:

Check the connectors from the reg-rec. Good chance you’ll find them melted.

Thanks for all the guidance, Pete. I have it on my bench. Connectors look ok. Watched a couple of YouTube videos to see how to test it but can't translate the examples I saw to mine. Out of interest, is it possible that tge loose negative battery terminal was a factor in the breakdown? Can't see any burned bits on the stator.