The blue/grey wire coming out of the ignition switch has broken on my R1100S.
Looked a fairly easy fix with a soldering iron.
But.......
It's all gone horribly wrong.
I took out the plastic switch from the ignition block, this is the plastic cylinder which has the wiring loom attached.
I SHOULD have popped open the plastic cap at the back to reveal the wires.
Instead (following some American YouTube advice) I opened the main switch which immediately had contacts & springs falling out!!
I think I've got all the bits.
But I've no idea where they go & how to put it all back together again.
I've Google searched but can't find any instructions or diagrams on how to reassemble it.
Anyone any ideas?
Ignition switch mayhem....... :(
Moderators: slparry, Gromit, Paul
Re: Ignition switch mayhem....... :(
Now you’ve done it
Take everything in a plastic bag to your local friendly auto-electrician. Let him stick it back together as you enjoy a latte in your coffee shop of choice.
At least that’s what I would do as I hate fiddly little jobs. Got to keep the blood pressure under control! Good luck.

Take everything in a plastic bag to your local friendly auto-electrician. Let him stick it back together as you enjoy a latte in your coffee shop of choice.
At least that’s what I would do as I hate fiddly little jobs. Got to keep the blood pressure under control! Good luck.
Re: Ignition switch mayhem....... :(
Thanks for the wise advice about taking the ignition switch bits in a plastic bag to an auto electrician.
But.......
I just couldn't help myself & continued on trying to sort it for another couple of hours in my freezing garage.
And......
I fixed it!!
There's a 3D puzzle of 4 tiny springs and 3 metal components.
I had a guess where they all belonged clipped it all back together turned the ignition, and it all worked.
Yaaaaaaaaaaaaaaaaaay!!!!
I've taken the bike out several times over the last few days and no probs.
Just thought I'd pass on my learning from this as it seems like there are a lot of issues with fractured wires coming out of the ignition switch.
1 It actually should be an easy fix
2 On the R1100S you can leave the ignition block in the head stock - most other models need for this to be removed which involves drilling through security bolts
3 To remove the plastic switch from the ignition block you need a 6" long precision screwdriver with a 2mm flat head blade to remove (or partially unscrew) the tiny grub screw which retains it.
4 When you have released the plastic switch only open the main casing if you absolutely have to and watch for springs & things falling out and be prepared for the 3D jigsaw of putting it all back together.
5 To replace the broken wire release the end cap to reveal the wiring.
6 Solder on a new replacement wire & put it all back together.
7 If you're not handy with a soldering iron you can buy a new loom & switch from Motoworks for £85 + P&P. This loom just clips into a socket in a plastic box under the fairing to the left of the forks.
Cheers
But.......
I just couldn't help myself & continued on trying to sort it for another couple of hours in my freezing garage.
And......
I fixed it!!
There's a 3D puzzle of 4 tiny springs and 3 metal components.
I had a guess where they all belonged clipped it all back together turned the ignition, and it all worked.
Yaaaaaaaaaaaaaaaaaay!!!!

I've taken the bike out several times over the last few days and no probs.
Just thought I'd pass on my learning from this as it seems like there are a lot of issues with fractured wires coming out of the ignition switch.
1 It actually should be an easy fix
2 On the R1100S you can leave the ignition block in the head stock - most other models need for this to be removed which involves drilling through security bolts
3 To remove the plastic switch from the ignition block you need a 6" long precision screwdriver with a 2mm flat head blade to remove (or partially unscrew) the tiny grub screw which retains it.
4 When you have released the plastic switch only open the main casing if you absolutely have to and watch for springs & things falling out and be prepared for the 3D jigsaw of putting it all back together.
5 To replace the broken wire release the end cap to reveal the wiring.
6 Solder on a new replacement wire & put it all back together.
7 If you're not handy with a soldering iron you can buy a new loom & switch from Motoworks for £85 + P&P. This loom just clips into a socket in a plastic box under the fairing to the left of the forks.
Cheers
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- Posts: 296
- Joined: Thu Oct 18, 2012 1:10 pm
- Location: UK
Re: Ignition switch mayhem....... :(
i normally take a few pics if i can , before taking things apart , often helps ,,, but its hard to allow for the boing factor
its not a boxer , its a 180 degree v-twin