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General Category >> Rubber Side Down! >> Ignition switch rating
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Message started by verslagen1 on 05/07/19 at 21:46:11

Title: Ignition switch rating
Post by verslagen1 on 05/07/19 at 21:46:11

Does anybody know what the ig switch is rated for?

I'm thinking of putting it before the fuses so both fuses would be switched off.

This would switch the decom controller off when the bike is off.

Title: Re: Ignition switch rating
Post by Ruttly on 05/07/19 at 22:57:13

But then if the switch fails there is no protection , no fuses
But voltage is the same

Title: Re: Ignition switch rating
Post by batman on 05/08/19 at 09:28:06

It might be better to install a "kill switch " after the fuse in the line going to the decomp.

Title: Re: Ignition switch rating
Post by verslagen1 on 05/08/19 at 11:51:48

So... how often does an ig switch fail?

Title: Re: Ignition switch rating
Post by norm92de on 05/08/19 at 12:45:51

I don't know how often but I have had switches fail, both on and off. Can be interesting, especially on an aircraft at night. :)

Title: Re: Ignition switch rating
Post by verslagen1 on 05/08/19 at 13:23:17

I was looking at the wiring diagram last night, and only the decomp controller/solenoid/stater relay is on the unswitched circuit.
All else is on the switched circuit.
Both circuits have 20 amp fuses.
The decomp solenoid can be a big draw item but it's momentary.
For those that remove the solenoid and go manual, there's no reason not to put both circuits thru the switch.

A rule of thumb says the fuse should be rated for 2 the actual usage.
So, a stock bike will probably use 10 amps normally.

A stock light is 55/65 watts and some people have installed 2 lights without blowing up the switch although they have ran the battery down.

So a stock ig switch will handle 15 - 20 amps no problem, 30 - 40 amps is probably the limit. That's enough to run both circuits thru the switch.

Title: Re: Ignition switch rating
Post by Ruttly on 05/08/19 at 14:26:30

Just install a relay to feed the decomp and control it with ignition switch and fuses will still be in place to protect the systems.

Title: Re: Ignition switch rating
Post by verslagen1 on 05/08/19 at 15:18:39

Hmmm... might be a good use of the sidestand relay.

Title: Re: Ignition switch rating
Post by Panhead on 05/08/19 at 16:00:36

I'm only speculating here, but judging from the size of the wires coming from the switch I would think the switch contacts are good for a lot more than they will ever see.

Title: Re: Ignition switch rating
Post by Ruttly on 05/09/19 at 04:40:07

Hmmm... might be a good use of the sidestand relay.[/quote]

That should work just fine and still have the fuses before the switch

Title: Re: Ignition switch rating
Post by Dave on 05/09/19 at 05:22:20

Now that you brought up fuse sizes...my factory ones are likely too big since the conversion.

No more decompression controller and all of my lights are LED.

Maybe there is no need to downsize the fuse.....as the wire size has not changed - only the working current draw. I have 6 years and 10,000 miles and no electrical gremlins yet (provided you don't count my RYCA tail light getting soaked and damaged by a TN/NC rainstorm.

(You folks with RYCA style tail light should take them apart and seal the seams with RTV).

http://i59.tinypic.com/2lji63o.jpg

Title: Re: Ignition switch rating
Post by verslagen1 on 05/09/19 at 07:32:00

5766696F626663070 wrote:

I'm only speculating here, but judging from the size of the wires coming from the switch I would think the switch contacts are good for a lot more than they will ever see.

The switch itself has pretty good sized wire, but the harness is minimal.