Fixing a broken ignition lock after attempted theft

As it says; what you've done to your bike and how it helped make it better.

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Pete.
Posts: 150
Joined: Thu Apr 02, 2015 7:16 pm

Fixing a broken ignition lock after attempted theft

Postby Pete. » Sun Jan 27, 2019 11:59 am

Just recording this here in case it's useful to someone later if they have their ignition torn out like I did this week.

After someone ripped out the ignition barrel on my bike, I bought a repair it from Motorworks. The kit is a new barrel with a bag full of tumblers that you mix and match to suit your original key. It's held in by a sprung pin that you poke a little wire into a hole to depress when you want to pull the barrel out. Only problem was that in ripping out the the barrel they also broke the top off the little alloy bit that the pin locates in, so my new barrel wouldn't stay in.

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So, not wanting to fork out for a new lock I thought about how to fix this one. The other side of the mechanism has a perfectly sound piece of metal that I could drill for the pin, if only it protruded from the opposite side. There's a handy hole that is supposed to be where you poke a tool into the depress the pin, so I used a 2.5mm drill through that hole to drill another blind hole opposite, the re-ground the end of the drill flat to square off the bottom of the hole.

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Now for the barrel. The pin direction has to be reversed so I drilled the blind hole right through 2.5mm and tapped it m3 then loctited a m3 screw into the thread just a few turns in.

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Then cut off the screw, ground it flush and that's it - the plunger now pokes out the other side. I put it all together and it works perfectly.

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Only possible downside is that there is now no way of ever removing the barrel without destroying something, but that's not too bad because it means I would only have to buy a new lock, which the repair has saved me from buying anyway :)
In hindsight, after drilling the barrel to reverse the pin and making the new blind hole I should have taken a 1.5mm drill and carried on right through to the outside, so that the pin could have been released later. With luck I'll never have to worry about it.

User avatar Great Britain
ianc53
Member
Posts: 552
Joined: Thu Feb 19, 2004 5:22 pm
Location: The Kingdom of Fife

Re: Fixing a broken ignition lock after attempted theft

Postby ianc53 » Sun Jan 27, 2019 1:07 pm

Thanks for posting this, always impressed when someone uses some skills to avoid paying BMW more money.

Cheers

Ian
Grey R1200RS SE 2016
Grey/ mandarin R1100S 2004
Blue R100RS 1980
Suzuki GT250B 1977

Great Britain
dave the german
Member
Posts: 3059
Joined: Tue Nov 01, 2005 4:35 am
Location: North East

Re: Fixing a broken ignition lock after attempted theft

Postby dave the german » Sun Jan 27, 2019 2:00 pm

Would it have been possible to use a grub screw? Not sure how the lock looks in situ and whether this would make it easy for a tea leaf
'15 R1200GS TE
'06 R1200S
'04 BCR
Yam SR 500 long term restoration
wanna win the lottery and ride my bike

Pete.
Posts: 150
Joined: Thu Apr 02, 2015 7:16 pm

Re: Fixing a broken ignition lock after attempted theft

Postby Pete. » Sun Jan 27, 2019 2:17 pm

Yes Dave it would be possible to just use a m3 grub screw and I considered it. You'd have to use a dog point one with a 2.5mm or smaller point. I looked though my tray of grub screws and didn't have one that was M3.

No issue with tea leaves since you'll always need the key to pull the barrel (properly).

Great Britain
dave the german
Member
Posts: 3059
Joined: Tue Nov 01, 2005 4:35 am
Location: North East

Re: Fixing a broken ignition lock after attempted theft

Postby dave the german » Mon Jan 28, 2019 4:08 am

All sound advice from when/if it happens to another Trixter - this forum is invaluable
'15 R1200GS TE

'06 R1200S

'04 BCR

Yam SR 500 long term restoration

wanna win the lottery and ride my bike


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