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Author Topic: Project "walrus" Yam XS 750  (Read 35136 times)

Offline XS750AU

  • Posts: 318
Re: Project "walrus" Yam XS 750
« Reply #40 on: Aug 10, 2016, 07:03:39 »
12.3 is marginal if the regulator is stuffed. Should be closer to 13V if it was a freshly charged battery. Suggest you charge it and see if  you get good spark. In the past I have hooked up a car or boat battery with jumper leads just to test things http://www.dotheton.com/forum/Smileys/default/wink.gif
Tim
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline Ryan Stecken

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Re: Project "walrus" Yam XS 750
« Reply #41 on: Aug 10, 2016, 07:27:09 »
Ok tim!so you connect a car battery (running motor) directly to the minus and plus terminals of the xs battery am I right...then i will do it this way next time!

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Offline XS750AU

  • Posts: 318
Re: Project "walrus" Yam XS 750
« Reply #42 on: Aug 10, 2016, 07:42:12 »
correct
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline Ryan Stecken

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Re: Project "walrus" Yam XS 750
« Reply #43 on: Aug 10, 2016, 07:46:20 »
Superb! :D then I will try it this way!

The PO told me that he thinks the rectifier is fried cuz the lights and control lights won´t come on (in all key position), he gave me a new unit, i guess I will try to connect the new unit to when I try the things you stated.

There is a malconnection too at the cables coming out of the rectifier (black cable came loose), could this also cause this ignition problem, i tried to fix it,maybe there´s still no connection?

Offline XS750AU

  • Posts: 318
Re: Project "walrus" Yam XS 750
« Reply #44 on: Aug 10, 2016, 08:07:42 »
Yes the cables and connectors are 40years old, there is probably more than one faulty connector. On my bike it would not charge, the rectifier was OK, the problem was just shitty connections that were worn out and corroded. The black cable out of the rectifier goes to earth. I hate electronics - it is more like black magic to me!!!!! In the end I just had to pay a guy to fix it http://www.dotheton.com/forum/Smileys/default/angry.gif.
Cheers
Tim
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline Garc

  • Posts: 18
Re: Project "walrus" Yam XS 750
« Reply #45 on: Aug 10, 2016, 13:56:00 »
I personally ran up and down every harness with a multimeter and cleaned all connecting plugs with contact cleaner/small wire brush.  Tested all loads for static battery draw and verified all resistances of components.
The joys of a 35+ year old bike.  Nothing beats the sound of a triple though.

Good luck
XS 750/850 Triple Shaftjacker

Offline Ryan Stecken

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Re: Project "walrus" Yam XS 750
« Reply #46 on: Aug 11, 2016, 07:11:36 »
Does any of you guys have a coloured wiring diagram handy in high res?would like to print it out to fight ny electrical gremlins...i yesterday dug out a spare loom maybe I will need it :-)

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Offline datadavid

  • Posts: 1138
Re: Project "walrus" Yam XS 750
« Reply #47 on: Aug 11, 2016, 08:00:57 »
I have one for every model made in my manual, can send pics of your models tonight when i go by the garage.

Offline datadavid

  • Posts: 1138
Re: Project "walrus" Yam XS 750
« Reply #48 on: Aug 11, 2016, 08:03:32 »
Electrics probably just need a good cleaning - the connectors hanging on the left side of the battery box are usually subjected to battery acid early in the bikes life because of the vent tube there, so they will be corroded and not letting voltage through!
Did you try to hang a size 10 spanner on the alternator cover with ignition switched on yet? It should magnetize enough to hold the spanner.
Soon you will have a roaring triple!

Offline Ryan Stecken

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Re: Project "walrus" Yam XS 750
« Reply #49 on: Aug 11, 2016, 09:08:58 »
Thanks data!will do!
I'm new to the 4stroke world so I keep learning everyday.
Alternator is left hand side am I right?
Will this also apply with my XS 850 electronic ignition?

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