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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: TimTyler on August 12, 2012, 10:52:15 PM

Title: Where Does This Ground Wire Connect
Post by: TimTyler on August 12, 2012, 10:52:15 PM

Putting the bike back together. Almost complete after three loooong days of nitrile gloves.

This electrical connector comes down from under the tank towards the battery / starter area and is grounded even though the jacket is red.

Where might I connect it?

Title: Re: Where Does This Ground Wire Connect
Post by: Rick G on August 13, 2012, 12:56:06 AM

There is an earth connection on thr gearbox just above the coils.  Socket head screw 6mm thread and 5mm hex. There are usually more than one eth connected there.

Title: Re: Where Does This Ground Wire Connect
Post by: TimTyler on August 13, 2012, 03:15:18 PM

Thanks, Rick!

I found this photo too (not my bike) that shows it connects to the same place as the battery ground.

Title: Re: Where Does This SPRING Go?
Post by: TimTyler on August 13, 2012, 04:25:54 PM

This small spring is the only part left over from my clutch rebuild. I thought it came off the side stand / center stand, but for the life of me I can't see where.

Title: Re: Where Does This Ground Wire Connect
Post by: mystic red on August 13, 2012, 05:25:44 PM

When in doubt, check the fiche. #13?


(http://www.maxbmwmotorcycles.com/fiche/DiagramsMid/B0000997.png?v=08102012)

http://www.maxbmwmotorcycles.com/fiche/DiagramsMain.aspx?vid=51743&rnd=08102012 (http://www.maxbmwmotorcycles.com/fiche/DiagramsMain.aspx?vid=51743&rnd=08102012)

Title: Re: Where Does This Ground Wire Connect
Post by: Motorandy123 on August 13, 2012, 06:45:07 PM

It looks like the rear brake pedal spring.

My bike has only one wire on that ground point, it is a smaller wire and goes
straight to the battery. Maybe 50 amp bikes have a bigger wire too?

Title: Re: Where Does This Ground Wire Connect
Post by: TimTyler on August 13, 2012, 08:01:19 PM

Quote from: mystic red on August 13, 2012, 05:25:44 PM

When in doubt, check the fiche. #13?

Yeah - I did that.

I have two each of the #13's and the #7's and they're all considerably thicker and twice as long as this little leftover spring.

Title: Re: Where Does This Ground Wire Connect
Post by: Uffda on August 13, 2012, 08:21:57 PM

I had the same problem 2 years ago after doing my first spline job.  Same little spring left over with no obvious place to go.  And I posted the same question you had...."Where does this left over spring go?"  As Randy said, it's the brake lever spring.  One end goes between the #7 springs on your center stand and the other end attaches to a spot near your MC.  Good luck.
#9 in attachment

Title: Re: Where Does This Ground Wire Connect
Post by: TimTyler on August 13, 2012, 08:28:14 PM

Quote from: Uffda on August 13, 2012, 08:21:57 PM

As Randy said, it's the brake lever spring.  One end goes between the #7 springs on your center stand and the other end attaches to a spot near your MC.

Bingo! That was it. Thanks, guys.

Title: Re: Where Does This Ground Wire Connect
Post by: Photog on August 14, 2012, 08:23:32 AM

Quote from: Motorandy123 on August 13, 2012, 06:45:07 PM

It looks like the rear brake pedal spring.

My bike has only one wire on that ground point, it is a smaller wire and goes
straight to the battery. Maybe 50 amp bikes have a bigger wire too?

Later K's (don't know what year, it's probably documented in here somewhere), have a bigger ground wire. Mine is an 87 and the factory wire is almost scary thin.
Euro Moto Electrics has a nice kit with upgraded battery wiring. You can roll your own too, of course. I found however, that the euromotoelectrics kit was very cost effective compared to a DIY effort.