Hi All,

Apologies I guess many think this has been done to death!!

Looks like I have the classic reg/rect failure, engine management light on, flat battery no charge etc.

The multi plug on mine looks as if it has welded itself together (I assume all you are supposed to do is squeeze the tang on the side of the block and pull?)

Bit concerned that many appear to have had replacement looms under warrantee, I assume this is due to the build up of heat from the bad connections causing damage to the wire?

Has anyone managed to get away with just cleaning the contacts up and resealing?

Should have vaselened it all up when it was new like the smart guys!!

Full dealer service history so will speak to them to see if they will do anything as it's a known problem but in the meantime any comments would be appreciated.

Thanks,

Adrian.

Which multi plug is this one? The one under the seat?

My engine management light is on too, but the battery gone flat because I installed a gps tracker device for too long without ride the bike, now, looks like is charging normally.

Hi,

The multi plug I can't get apart is on the reg/rect itself, on the front down tube of the frame near the horn.

You can't get apart because its a combo relay?

You should be able to get it apart. Almost certainly you have the reg/rect problem. The only "cheap" fix if out of warranty is Bernard's (stoic bloke)...

http://www.xt660.com/showthread.php?t=17054

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+1

I agree, I had the original Ten that broke down, that one also had the replacement full loom. What a load of bull. The problem is that Yamaha in their infinate wisdom decided to remodel the actual rectifier and you will note that the pins inside the rectifier 'pocket' are considerably smaller than on either the X or R models. It always seems to be the Earth pin that heats up and melts the connector block.
I now have a small Gammatronix LED on my front cowling that shows me the output from the battery. If this indicates less that 12V I can stop and check the reg connector.
So far no problems but if it did occur I would certainly do Bernards mod and move the Reg up under the headstock.
Hope this helps.

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If I'm not working, I'll be

But the battery is charging normally I guess.

The battery just flat out because I let 2 weeks in the gps tracker on, so, I made a slow charge and now is working flawless. Just the light management is on all the time, just go off if I put high been light. I dont know, but for me is a stupid problem.

Is there a way to check if the problem is the reg/rect? I tested the charging system, when is around 3.000rpm, the power output is around 13.4V.