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Help: Ditching engine cut-off relay

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Help: Ditching engine cut-off relay

PostAuthor: Preben » Fri Dec 25, 2015 7:39 am

Hello!
I´m building a trike using engine and wiring from a XV1600, but i have no use for the engine cut-off relay, which even is defective, is there anyway i can connect the to bypass this relay?
Thanks for all help i can get!
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Re: Help: Ditching engine cut-off relay

PostAuthor: crdnick » Fri Dec 25, 2015 1:07 pm

the mythical xv1600 huh.

you should re read what you typed.

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Re: Help: Ditching engine cut-off relay

PostAuthor: bstig60 » Fri Dec 25, 2015 2:26 pm

crdnick wrote:the mythical xv1600 huh.

you should re read what you typed.


Not a mythe! https://en.wikipedia.org/wiki/Yamaha_XV1600A Road Star; Wild Star; produced from 99-2005.

OP: the wiring diagram you posted appears to be for a 4 cylinder bike. You should be able to find a wiring diagram for your Road Star on line. To by pass the cutoff relay, you will have to rewire it. Heres a diagram for an '08.... http://roadstarclinic.com/component/opt ... id,800873/
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Re: Help: Ditching engine cut-off relay

PostAuthor: Preben » Fri Dec 25, 2015 2:28 pm

crdnick wrote:the mythical xv1600 huh.

you should re read what you typed.


Meaning what?

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Re: Help: Ditching engine cut-off relay

PostAuthor: Octania » Fri Dec 25, 2015 2:53 pm

Wow?

Simmer down?

Ignore stuff that isn't really a problem?

Focus on the solution and helping others?

Merry Christmas all y'all!

Preben- I have not your actual wiring diagram, nor familiarity with your exact wiring setup, but, in general, this type relay needs to be turned on by various switches and then it allows something you want, to happen. So, assuming you can find which one it is, you need only do yourself with a wire, what the relay or its activating switches would do. You can either trick the relay into being on all the time, or better yet, just jumper from in to out on the circuit the relay is controlling- typically the larger two. Just verify that you didn't leave some circuit on ALL THE TIME even when the key is off. If so, you will have to get a little more creative and perhaps trick the solenoid into thinking all is well on its control signal side, perhaps by a button that you have to press each time you start the engine. This is basic electricity, and should be easy.

Do you know how to wire a "drop relay"? This is one that when activated powers itself and holds itself on until all incoming power is cut. This is probably what the one you are fighting used to do. My bike's headlights are run like that- activates the headlight only after the start button has been pressed, then stays on always until the power is cut by means of turning off the key switch.
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Re: Help: Ditching engine cut-off relay

PostAuthor: Jake » Fri Dec 25, 2015 9:07 pm

To clear up any misunderstanding, I moved this to XV1600, even though it's an electronic question.
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Re: Help: Ditching engine cut-off relay

PostAuthor: Preben » Sat Dec 26, 2015 2:57 am

The reason that i will get rid of this relay, is that it is defective according test done after the manual, and it seems to be discontinued as well. I purchased another used relay on ebay before x-mas, but that´s not here yet.

The wiring diagram is the correct one, out of a Clymers handbook, this model have dual sparkplugs in each cylinder.

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Re: Help: Ditching engine cut-off relay

PostAuthor: totallyredvirago » Sat Dec 26, 2015 9:15 am

looking the relay over. it controls the fuel pump and also a safety relay. a total rewire will be needed to bypass it............dan
82 xv 750 skull on grips,levers,3rd brake and side covers.soft bags and tool bag, relay for coils, fresh inferno red, paint code PEL(red)

no time to do it right..always enough time to do it twice.
it is if is isnt :con:
If it went together easy... you forgot something.
when in doubt.... ground it out!

http://www.viragotechforum.com/viewtopic.php?f=140&t=35947 (bare bones wiring81-83 xv750)
http://www.viragotechforum.com/viewtopic.php?f=140&t=48895 (91 up xv750 bare bones)
http://www.viragotechforum.com/viewtopic.php?f=140&t=36987(84-85 xv700,1000 bare bones)

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Re: Help: Ditching engine cut-off relay

PostAuthor: Preben » Sat Dec 26, 2015 9:34 am

totallyredvirago wrote:looking the relay over. it controls the fuel pump and also a safety relay. a total rewire will be needed to bypass it............dan

What do you mean with at total rewire?
I don´t have the switches (clutch and sidestand), and i don´t have a fuel pump either. It´s build from scratch wit mostly custom made parts, harley stuff and the engine.

Edit:
Problem solved, without relay, and everything works. :thanks:

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Re: Help: Ditching engine cut-off relay

PostAuthor: totallyredvirago » Sat Dec 26, 2015 1:43 pm

ooh i did not know you planed a bare bones rewire. but i was right. you did rewire. lol. anyway yes if you got rid of the fuel pump and saftey switches then all you would need to do is trick the TCI or in your case the CDI to not allow a spark kill. that would be done with the blue/black safety wire going to the CDI. what did you do with this wire? ground or power it?...........dan
82 xv 750 skull on grips,levers,3rd brake and side covers.soft bags and tool bag, relay for coils, fresh inferno red, paint code PEL(red)

no time to do it right..always enough time to do it twice.
it is if is isnt :con:
If it went together easy... you forgot something.
when in doubt.... ground it out!

http://www.viragotechforum.com/viewtopic.php?f=140&t=35947 (bare bones wiring81-83 xv750)
http://www.viragotechforum.com/viewtopic.php?f=140&t=48895 (91 up xv750 bare bones)
http://www.viragotechforum.com/viewtopic.php?f=140&t=36987(84-85 xv700,1000 bare bones)

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Re: Help: Ditching engine cut-off relay

PostAuthor: Octania » Sat Dec 26, 2015 9:23 pm

two plugs per banger?
1600 cc?

I must go learn more about this thing.

Sounds like with TRV's guidance you can figure out how to fool the ign system into thinking it's OK to run.
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