 The $2 bike imobiliser
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Joined: Jan 2005
Posts: 2,362
Oil Expert
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OP
Oil Expert
Joined: Jan 2005
Posts: 2,362 |
Don't want/can't afford an alarm but want to stop some mongrel hot-wiring your ride? I was checking something unrelated out and it occurred to me that the alarm connector has a blank plug with two wire "loops", each one connecting a pair of pins. If you remove the plug the bike won't start but that's a bit of a pain to do on the street. However if you cut the wire loops and extend them to a hidden dual pole switch you have a handy little hidden "kill switch". It's by no means fool-proof but it might delay an oppourtunist thief long enough for him to get discouraged and steal someone else's pride & joy instead.
If anyone's interested I can put up some details as to how to do it.
Matt
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 Re: The $2 bike imobiliser
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Joined: Jan 2005
Posts: 3,960
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,960 |
John
Like a dog on a car ride with my tongue in the wind
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Re: The $2 bike imobiliser
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Joined: Jan 2005
Posts: 12,877
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,877 |
Benny
Black & Silver '02
Too many mods to list
Not enough miles ridden
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Re: The $2 bike imobiliser
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Anonymous
Unregistered
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Anonymous
Unregistered
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Sounds good Matt. I remember reading some time ago about a guy who was supposed to have wired a spark plug to his gas tank with a secret switch. If you tried to start his bike without knowing about the other switch ......... Not sure if that was one of them urban myth things but if you could plans for one of them too. Thanks in advance 
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Re: The $2 bike imobiliser
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Joined: Jan 2005
Posts: 2,362
Oil Expert
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OP
Oil Expert
Joined: Jan 2005
Posts: 2,362 |
Quote:
I remember reading some time ago about a guy who was supposed to have wired a spark plug to his gas tank with a secret switch.
My word Adey... you seem to have become somewhat sadistic with your rapidly lessening form... and btw congrats on your new svelte self.
Anyway, here tis, the single simplest electronic doohickey I've put up here, and as such I'm not goint to any great lengths to explain it.
The first task you need to achieve is the purchase of a "dual pole" switch. There's a dozen or more sorts of dual pole switch, the sort you'll probably get is a "dual pole dual throw" (DPDT) without a "centre off" which just means it's two switches glued together and each each switch has two "on" positions and no off position. Wether you get a toggle switch, a rocker, a pushbutton, or anything else is up to you, since you're going to decide where it lives. In the USA you can get these from Radio Shack or a million other electronics places (there's an expensive place called Frys there isn't there?), in the UK it'd be Maplin I believe, and in Australia I'd go to Jaycar, Dick Smith or Tandy. There's probably a million websites you can order one from too.
Figure 1 shows the right hand side of the bike with the tank removed. A free cigar to the first person to spot the cleverly disguised alarm connector.
Too late, I already smoked the cigar. Anyhoo, please note the two seemingly innocent wire "loops" on the bespoke connector. Anyone with access to a circuit diagram will tell you that these connect to the ignition and the starter motor. The idea is that when the alarm is installed it can disable both of these, but without the alarm the connector needs a "blank" with the loops.
Figure the-second demonstrates the remarkably complex modification required to the loops, whereby one cuts a loop, adds extensions to either end of it, and solders those connections to one side of our switch. One then repeats with the other loops, to the other side of the switch. My picture shows the back of a toggle switch - if you've bought something different you'll have to work it out yourself.
Finally you need to mount the switch on the bike someplace. I'd suggest you hide it up under the tank, but it's up to you - it IS supposed to be a "secret" switch after all.
Caveats - you should use solder, not spit or superglue, and heatshrink rather than modelling clay or something equally inventive. While I've taken all care with this, if you blow up your bike, wife, dog, or anything else by doing this it's your problem, not mine.
Matt
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Re: The $2 bike imobiliser
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Joined: Jan 2005
Posts: 12,164 Likes: 1
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,164 Likes: 1 |
Cool! I was wondering what those wires were for.
Soren
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