'Home made' immobiliser

[Biker100]

well basicly i'm wanting to fit some sort of imobiliser switch to the bike (02 nsr), as i dont trust the scallys from the estate.

i'de just like some help from you lot rly, it would be much apreciated.

i was thinking about cutting/rejoining the starter motor live wire and installing some sort or switch which would be hidden, but then realised it could still be 'bump' started.

i then thought about doing the same with the HT lead but dont know what sort of affect it would have with it being 'high tension'. would it effect it??

any body got any suggestions on where to fit the switch??

thanx liam

[stinkwheel]

You want a switch that connects the ignition coil input to earth. It wont be going anywhere (under its own steam) with the coil earthed. The ignition will still light up but it won't start.

[KatOwner]

Don't try and tap into HT voltage. The switch would probably result in a permanently immobilised ignition! I can't think of a switch that would handle HT voltages

Anyway..... I personally have tried fitting a switch under the seat that interrupted the power supply from battery to the ignition ( in much the same way a normal kill-switch does ), and also the 'earth the coil' approach. The latter is MUCH less likely to cause problems. You have to be careful you don't end up with a flat battery!

Ultimately, though, the only way to stop the scally's having the thing away is to lock it to something immovable with a bloody huge chain!

[loply]

Just follow the wires from the kill switch and add another switch to them.

Safest and surest way IMO.

For an NSR125 though mate, I could put that in my rucksack if I wanted to nick it, so it's only half the battle to stop the engine from starting.
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Yamaha SZR660 Caution to the wind, the throttle pinned!

[Biker100]

thank for the help people.

i currently have it chained to the wall, chained to a gas canister and disklocked f and r inside my shed. call me paranoid but i still dnt think its safe.

tbh the most likely people to take it are the scallys who will only be using it to 'rag'. so if it doesnt start they'll hopefully leave it.

i think i'm going to go with the, earthing the ignition coil method as i think this will be most efective.

thanks liam

[nrml76]

On one of my mates bikes, we fixed an extra automotive toggle switch in the kill switch circuit, and mounted it deep underneath the fuel tank. It worked very well. Make sure you use automotive switches, as the vibration damages ordinary switches. Use good quality wires also. The wires have habit of breaking off were the are fixed to the switch.
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Everyone who lives dies, yet not everyone who dies has lived. We take these risks not to escape life, but to prevent life from escaping us.

[loply]

[Phoenix]

A reed switch needs a constant magnetic source though to be on otherwise as soon as u remove the magnet it'll break the circuit again.

[alien.46.uk]

Hmm ... I Like the idea of a simple switch to cut off power etc ...

Would a switch just after the Pos+ connection not work without draining the battery?

Luke.
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2007 Kawasaki ZX10R :: 1998 Kawasaki ZX-9R - SOLD
1998 Yamaha FZS600 Fazer - SOLD :: 1994 Aprilia Pegaso 125 - SOLD

[stinkwheel]